939 lines
34 KiB
C
939 lines
34 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2011, 2014 by Delphix. All rights reserved.
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* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
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* Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
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* Copyright 2013 Saso Kiselkov. All rights reserved.
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*/
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#ifndef _SYS_SPA_H
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#define _SYS_SPA_H
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#include <sys/avl.h>
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#include <sys/zfs_context.h>
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#include <sys/kstat.h>
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#include <sys/nvpair.h>
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#include <sys/sysmacros.h>
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#include <sys/types.h>
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#include <sys/fs/zfs.h>
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#include <sys/spa_checksum.h>
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#include <sys/dmu.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Forward references that lots of things need.
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*/
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typedef struct spa spa_t;
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typedef struct vdev vdev_t;
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typedef struct metaslab metaslab_t;
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typedef struct metaslab_group metaslab_group_t;
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typedef struct metaslab_class metaslab_class_t;
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typedef struct zio zio_t;
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typedef struct zilog zilog_t;
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typedef struct spa_aux_vdev spa_aux_vdev_t;
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typedef struct ddt ddt_t;
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typedef struct ddt_entry ddt_entry_t;
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typedef struct zbookmark_phys zbookmark_phys_t;
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struct dsl_pool;
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struct dsl_dataset;
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/*
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* General-purpose 32-bit and 64-bit bitfield encodings.
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*/
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#define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len))
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#define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len))
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#define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low))
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#define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low))
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#define BF32_GET(x, low, len) BF32_DECODE(x, low, len)
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#define BF64_GET(x, low, len) BF64_DECODE(x, low, len)
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#define BF32_SET(x, low, len, val) do { \
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ASSERT3U(val, <, 1U << (len)); \
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ASSERT3U(low + len, <=, 32); \
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(x) ^= BF32_ENCODE((x >> low) ^ (val), low, len); \
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_NOTE(CONSTCOND) } while (0)
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#define BF64_SET(x, low, len, val) do { \
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ASSERT3U(val, <, 1ULL << (len)); \
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ASSERT3U(low + len, <=, 64); \
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((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len)); \
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_NOTE(CONSTCOND) } while (0)
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#define BF32_GET_SB(x, low, len, shift, bias) \
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((BF32_GET(x, low, len) + (bias)) << (shift))
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#define BF64_GET_SB(x, low, len, shift, bias) \
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((BF64_GET(x, low, len) + (bias)) << (shift))
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#define BF32_SET_SB(x, low, len, shift, bias, val) do { \
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ASSERT(IS_P2ALIGNED(val, 1U << shift)); \
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ASSERT3S((val) >> (shift), >=, bias); \
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BF32_SET(x, low, len, ((val) >> (shift)) - (bias)); \
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_NOTE(CONSTCOND) } while (0)
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#define BF64_SET_SB(x, low, len, shift, bias, val) do { \
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ASSERT(IS_P2ALIGNED(val, 1ULL << shift)); \
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ASSERT3S((val) >> (shift), >=, bias); \
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BF64_SET(x, low, len, ((val) >> (shift)) - (bias)); \
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_NOTE(CONSTCOND) } while (0)
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/*
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* We currently support block sizes from 512 bytes to 16MB.
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* The benefits of larger blocks, and thus larger IO, need to be weighed
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* against the cost of COWing a giant block to modify one byte, and the
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* large latency of reading or writing a large block.
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*
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* Note that although blocks up to 16MB are supported, the recordsize
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* property can not be set larger than zfs_max_recordsize (default 1MB).
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* See the comment near zfs_max_recordsize in dsl_dataset.c for details.
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*
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* Note that although the LSIZE field of the blkptr_t can store sizes up
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* to 32MB, the dnode's dn_datablkszsec can only store sizes up to
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* 32MB - 512 bytes. Therefore, we limit SPA_MAXBLOCKSIZE to 16MB.
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*/
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#define SPA_MINBLOCKSHIFT 9
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#define SPA_OLD_MAXBLOCKSHIFT 17
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#define SPA_MAXBLOCKSHIFT 24
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#define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT)
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#define SPA_OLD_MAXBLOCKSIZE (1ULL << SPA_OLD_MAXBLOCKSHIFT)
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#define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT)
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/*
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* Alignment Shift (ashift) is an immutable, internal top-level vdev property
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* which can only be set at vdev creation time. Physical writes are always done
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* according to it, which makes 2^ashift the smallest possible IO on a vdev.
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*
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* We currently allow values ranging from 512 bytes (2^9 = 512) to 8 KiB
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* (2^13 = 8,192).
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*/
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#define ASHIFT_MIN 9
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#define ASHIFT_MAX 13
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/*
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* Size of block to hold the configuration data (a packed nvlist)
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*/
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#define SPA_CONFIG_BLOCKSIZE (1ULL << 14)
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/*
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* The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
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* The ASIZE encoding should be at least 64 times larger (6 more bits)
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* to support up to 4-way RAID-Z mirror mode with worst-case gang block
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* overhead, three DVAs per bp, plus one more bit in case we do anything
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* else that expands the ASIZE.
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*/
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#define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */
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#define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */
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#define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */
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#define SPA_COMPRESSBITS 7
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/*
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* All SPA data is represented by 128-bit data virtual addresses (DVAs).
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* The members of the dva_t should be considered opaque outside the SPA.
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*/
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typedef struct dva {
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uint64_t dva_word[2];
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} dva_t;
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/*
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* Some checksums/hashes need a 256-bit initialization salt. This salt is kept
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* secret and is suitable for use in MAC algorithms as the key.
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*/
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typedef struct zio_cksum_salt {
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uint8_t zcs_bytes[32];
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} zio_cksum_salt_t;
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/*
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* Each block is described by its DVAs, time of birth, checksum, etc.
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* The word-by-word, bit-by-bit layout of the blkptr is as follows:
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*
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* 64 56 48 40 32 24 16 8 0
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* 0 | vdev1 | GRID | ASIZE |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* 1 |G| offset1 |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* 2 | vdev2 | GRID | ASIZE |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* 3 |G| offset2 |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* 4 | vdev3 | GRID | ASIZE |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* 5 |G| offset3 |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* 6 |BDX|lvl| type | cksum |E| comp| PSIZE | LSIZE |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* 7 | padding |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* 8 | padding |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* 9 | physical birth txg |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* a | logical birth txg |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* b | fill count |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* c | checksum[0] |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* d | checksum[1] |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* e | checksum[2] |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* f | checksum[3] |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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*
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* Legend:
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*
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* vdev virtual device ID
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* offset offset into virtual device
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* LSIZE logical size
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* PSIZE physical size (after compression)
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* ASIZE allocated size (including RAID-Z parity and gang block headers)
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* GRID RAID-Z layout information (reserved for future use)
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* cksum checksum function
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* comp compression function
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* G gang block indicator
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* B byteorder (endianness)
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* D dedup
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* X encryption (on version 30, which is not supported)
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* E blkptr_t contains embedded data (see below)
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* lvl level of indirection
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* type DMU object type
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* phys birth txg of block allocation; zero if same as logical birth txg
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* log. birth transaction group in which the block was logically born
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* fill count number of non-zero blocks under this bp
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* checksum[4] 256-bit checksum of the data this bp describes
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*/
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/*
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* "Embedded" blkptr_t's don't actually point to a block, instead they
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* have a data payload embedded in the blkptr_t itself. See the comment
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* in blkptr.c for more details.
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*
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* The blkptr_t is laid out as follows:
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*
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* 64 56 48 40 32 24 16 8 0
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* 0 | payload |
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* 1 | payload |
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* 2 | payload |
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* 3 | payload |
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* 4 | payload |
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* 5 | payload |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* 6 |BDX|lvl| type | etype |E| comp| PSIZE| LSIZE |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* 7 | payload |
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* 8 | payload |
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* 9 | payload |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* a | logical birth txg |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* b | payload |
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* c | payload |
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* d | payload |
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* e | payload |
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* f | payload |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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*
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* Legend:
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*
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* payload contains the embedded data
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* B (byteorder) byteorder (endianness)
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* D (dedup) padding (set to zero)
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* X encryption (set to zero; see above)
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* E (embedded) set to one
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* lvl indirection level
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* type DMU object type
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* etype how to interpret embedded data (BP_EMBEDDED_TYPE_*)
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* comp compression function of payload
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* PSIZE size of payload after compression, in bytes
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* LSIZE logical size of payload, in bytes
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* note that 25 bits is enough to store the largest
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* "normal" BP's LSIZE (2^16 * 2^9) in bytes
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* log. birth transaction group in which the block was logically born
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*
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* Note that LSIZE and PSIZE are stored in bytes, whereas for non-embedded
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* bp's they are stored in units of SPA_MINBLOCKSHIFT.
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* Generally, the generic BP_GET_*() macros can be used on embedded BP's.
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* The B, D, X, lvl, type, and comp fields are stored the same as with normal
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* BP's so the BP_SET_* macros can be used with them. etype, PSIZE, LSIZE must
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* be set with the BPE_SET_* macros. BP_SET_EMBEDDED() should be called before
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* other macros, as they assert that they are only used on BP's of the correct
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* "embedded-ness".
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*/
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#define BPE_GET_ETYPE(bp) \
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(ASSERT(BP_IS_EMBEDDED(bp)), \
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BF64_GET((bp)->blk_prop, 40, 8))
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#define BPE_SET_ETYPE(bp, t) do { \
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ASSERT(BP_IS_EMBEDDED(bp)); \
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BF64_SET((bp)->blk_prop, 40, 8, t); \
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_NOTE(CONSTCOND) } while (0)
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#define BPE_GET_LSIZE(bp) \
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(ASSERT(BP_IS_EMBEDDED(bp)), \
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BF64_GET_SB((bp)->blk_prop, 0, 25, 0, 1))
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#define BPE_SET_LSIZE(bp, x) do { \
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ASSERT(BP_IS_EMBEDDED(bp)); \
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BF64_SET_SB((bp)->blk_prop, 0, 25, 0, 1, x); \
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_NOTE(CONSTCOND) } while (0)
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#define BPE_GET_PSIZE(bp) \
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(ASSERT(BP_IS_EMBEDDED(bp)), \
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BF64_GET_SB((bp)->blk_prop, 25, 7, 0, 1))
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#define BPE_SET_PSIZE(bp, x) do { \
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ASSERT(BP_IS_EMBEDDED(bp)); \
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BF64_SET_SB((bp)->blk_prop, 25, 7, 0, 1, x); \
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_NOTE(CONSTCOND) } while (0)
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typedef enum bp_embedded_type {
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BP_EMBEDDED_TYPE_DATA,
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BP_EMBEDDED_TYPE_RESERVED, /* Reserved for an unintegrated feature. */
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NUM_BP_EMBEDDED_TYPES = BP_EMBEDDED_TYPE_RESERVED
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} bp_embedded_type_t;
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#define BPE_NUM_WORDS 14
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#define BPE_PAYLOAD_SIZE (BPE_NUM_WORDS * sizeof (uint64_t))
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#define BPE_IS_PAYLOADWORD(bp, wp) \
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((wp) != &(bp)->blk_prop && (wp) != &(bp)->blk_birth)
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#define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */
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#define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */
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/*
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* A block is a hole when it has either 1) never been written to, or
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* 2) is zero-filled. In both cases, ZFS can return all zeroes for all reads
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* without physically allocating disk space. Holes are represented in the
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* blkptr_t structure by zeroed blk_dva. Correct checking for holes is
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* done through the BP_IS_HOLE macro. For holes, the logical size, level,
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* DMU object type, and birth times are all also stored for holes that
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* were written to at some point (i.e. were punched after having been filled).
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*/
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typedef struct blkptr {
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dva_t blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */
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uint64_t blk_prop; /* size, compression, type, etc */
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uint64_t blk_pad[2]; /* Extra space for the future */
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uint64_t blk_phys_birth; /* txg when block was allocated */
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uint64_t blk_birth; /* transaction group at birth */
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uint64_t blk_fill; /* fill count */
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zio_cksum_t blk_cksum; /* 256-bit checksum */
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} blkptr_t;
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/*
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* Macros to get and set fields in a bp or DVA.
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*/
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#define DVA_GET_ASIZE(dva) \
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BF64_GET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, SPA_MINBLOCKSHIFT, 0)
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#define DVA_SET_ASIZE(dva, x) \
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BF64_SET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, \
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SPA_MINBLOCKSHIFT, 0, x)
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#define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8)
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#define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x)
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#define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32)
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#define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x)
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#define DVA_GET_OFFSET(dva) \
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BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0)
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#define DVA_SET_OFFSET(dva, x) \
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BF64_SET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0, x)
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#define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1)
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#define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x)
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#define BP_GET_LSIZE(bp) \
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(BP_IS_EMBEDDED(bp) ? \
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(BPE_GET_ETYPE(bp) == BP_EMBEDDED_TYPE_DATA ? BPE_GET_LSIZE(bp) : 0): \
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BF64_GET_SB((bp)->blk_prop, 0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1))
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#define BP_SET_LSIZE(bp, x) do { \
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ASSERT(!BP_IS_EMBEDDED(bp)); \
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BF64_SET_SB((bp)->blk_prop, \
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0, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1, x); \
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_NOTE(CONSTCOND) } while (0)
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#define BP_GET_PSIZE(bp) \
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(BP_IS_EMBEDDED(bp) ? 0 : \
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BF64_GET_SB((bp)->blk_prop, 16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1))
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#define BP_SET_PSIZE(bp, x) do { \
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ASSERT(!BP_IS_EMBEDDED(bp)); \
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BF64_SET_SB((bp)->blk_prop, \
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16, SPA_PSIZEBITS, SPA_MINBLOCKSHIFT, 1, x); \
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_NOTE(CONSTCOND) } while (0)
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#define BP_GET_COMPRESS(bp) \
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BF64_GET((bp)->blk_prop, 32, SPA_COMPRESSBITS)
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#define BP_SET_COMPRESS(bp, x) \
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BF64_SET((bp)->blk_prop, 32, SPA_COMPRESSBITS, x)
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#define BP_IS_EMBEDDED(bp) BF64_GET((bp)->blk_prop, 39, 1)
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#define BP_SET_EMBEDDED(bp, x) BF64_SET((bp)->blk_prop, 39, 1, x)
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#define BP_GET_CHECKSUM(bp) \
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(BP_IS_EMBEDDED(bp) ? ZIO_CHECKSUM_OFF : \
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BF64_GET((bp)->blk_prop, 40, 8))
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#define BP_SET_CHECKSUM(bp, x) do { \
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ASSERT(!BP_IS_EMBEDDED(bp)); \
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BF64_SET((bp)->blk_prop, 40, 8, x); \
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_NOTE(CONSTCOND) } while (0)
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#define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8)
|
|
#define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x)
|
|
|
|
#define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
|
|
#define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)
|
|
|
|
#define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1)
|
|
#define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x)
|
|
|
|
#define BP_GET_BYTEORDER(bp) BF64_GET((bp)->blk_prop, 63, 1)
|
|
#define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x)
|
|
|
|
#define BP_PHYSICAL_BIRTH(bp) \
|
|
(BP_IS_EMBEDDED(bp) ? 0 : \
|
|
(bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth)
|
|
|
|
#define BP_SET_BIRTH(bp, logical, physical) \
|
|
{ \
|
|
ASSERT(!BP_IS_EMBEDDED(bp)); \
|
|
(bp)->blk_birth = (logical); \
|
|
(bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \
|
|
}
|
|
|
|
#define BP_GET_FILL(bp) (BP_IS_EMBEDDED(bp) ? 1 : (bp)->blk_fill)
|
|
|
|
#define BP_IS_METADATA(bp) \
|
|
(BP_GET_LEVEL(bp) > 0 || DMU_OT_IS_METADATA(BP_GET_TYPE(bp)))
|
|
|
|
#define BP_GET_ASIZE(bp) \
|
|
(BP_IS_EMBEDDED(bp) ? 0 : \
|
|
DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
|
|
DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
|
|
DVA_GET_ASIZE(&(bp)->blk_dva[2]))
|
|
|
|
#define BP_GET_UCSIZE(bp) \
|
|
(BP_IS_METADATA(bp) ? BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp))
|
|
|
|
#define BP_GET_NDVAS(bp) \
|
|
(BP_IS_EMBEDDED(bp) ? 0 : \
|
|
!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
|
|
!!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
|
|
!!DVA_GET_ASIZE(&(bp)->blk_dva[2]))
|
|
|
|
#define BP_COUNT_GANG(bp) \
|
|
(BP_IS_EMBEDDED(bp) ? 0 : \
|
|
(DVA_GET_GANG(&(bp)->blk_dva[0]) + \
|
|
DVA_GET_GANG(&(bp)->blk_dva[1]) + \
|
|
DVA_GET_GANG(&(bp)->blk_dva[2])))
|
|
|
|
#define DVA_EQUAL(dva1, dva2) \
|
|
((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
|
|
(dva1)->dva_word[0] == (dva2)->dva_word[0])
|
|
|
|
#define BP_EQUAL(bp1, bp2) \
|
|
(BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) && \
|
|
(bp1)->blk_birth == (bp2)->blk_birth && \
|
|
DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) && \
|
|
DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) && \
|
|
DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2]))
|
|
|
|
|
|
#define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0)
|
|
|
|
#define BP_IDENTITY(bp) (ASSERT(!BP_IS_EMBEDDED(bp)), &(bp)->blk_dva[0])
|
|
#define BP_IS_GANG(bp) \
|
|
(BP_IS_EMBEDDED(bp) ? B_FALSE : DVA_GET_GANG(BP_IDENTITY(bp)))
|
|
#define DVA_IS_EMPTY(dva) ((dva)->dva_word[0] == 0ULL && \
|
|
(dva)->dva_word[1] == 0ULL)
|
|
#define BP_IS_HOLE(bp) \
|
|
(!BP_IS_EMBEDDED(bp) && DVA_IS_EMPTY(BP_IDENTITY(bp)))
|
|
|
|
/* BP_IS_RAIDZ(bp) assumes no block compression */
|
|
#define BP_IS_RAIDZ(bp) (DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \
|
|
BP_GET_PSIZE(bp))
|
|
|
|
#define BP_ZERO(bp) \
|
|
{ \
|
|
(bp)->blk_dva[0].dva_word[0] = 0; \
|
|
(bp)->blk_dva[0].dva_word[1] = 0; \
|
|
(bp)->blk_dva[1].dva_word[0] = 0; \
|
|
(bp)->blk_dva[1].dva_word[1] = 0; \
|
|
(bp)->blk_dva[2].dva_word[0] = 0; \
|
|
(bp)->blk_dva[2].dva_word[1] = 0; \
|
|
(bp)->blk_prop = 0; \
|
|
(bp)->blk_pad[0] = 0; \
|
|
(bp)->blk_pad[1] = 0; \
|
|
(bp)->blk_phys_birth = 0; \
|
|
(bp)->blk_birth = 0; \
|
|
(bp)->blk_fill = 0; \
|
|
ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \
|
|
}
|
|
|
|
#ifdef _BIG_ENDIAN
|
|
#define ZFS_HOST_BYTEORDER (0ULL)
|
|
#else
|
|
#define ZFS_HOST_BYTEORDER (1ULL)
|
|
#endif
|
|
|
|
#define BP_SHOULD_BYTESWAP(bp) (BP_GET_BYTEORDER(bp) != ZFS_HOST_BYTEORDER)
|
|
|
|
#define BP_SPRINTF_LEN 320
|
|
|
|
/*
|
|
* This macro allows code sharing between zfs, libzpool, and mdb.
|
|
* 'func' is either snprintf() or mdb_snprintf().
|
|
* 'ws' (whitespace) can be ' ' for single-line format, '\n' for multi-line.
|
|
*/
|
|
#define SNPRINTF_BLKPTR(func, ws, buf, size, bp, type, checksum, compress) \
|
|
{ \
|
|
static const char *copyname[] = \
|
|
{ "zero", "single", "double", "triple" }; \
|
|
int len = 0; \
|
|
int copies = 0; \
|
|
int d; \
|
|
\
|
|
if (bp == NULL) { \
|
|
len += func(buf + len, size - len, "<NULL>"); \
|
|
} else if (BP_IS_HOLE(bp)) { \
|
|
len += func(buf + len, size - len, \
|
|
"HOLE [L%llu %s] " \
|
|
"size=%llxL birth=%lluL", \
|
|
(u_longlong_t)BP_GET_LEVEL(bp), \
|
|
type, \
|
|
(u_longlong_t)BP_GET_LSIZE(bp), \
|
|
(u_longlong_t)bp->blk_birth); \
|
|
} else if (BP_IS_EMBEDDED(bp)) { \
|
|
len = func(buf + len, size - len, \
|
|
"EMBEDDED [L%llu %s] et=%u %s " \
|
|
"size=%llxL/%llxP birth=%lluL", \
|
|
(u_longlong_t)BP_GET_LEVEL(bp), \
|
|
type, \
|
|
(int)BPE_GET_ETYPE(bp), \
|
|
compress, \
|
|
(u_longlong_t)BPE_GET_LSIZE(bp), \
|
|
(u_longlong_t)BPE_GET_PSIZE(bp), \
|
|
(u_longlong_t)bp->blk_birth); \
|
|
} else { \
|
|
for (d = 0; d < BP_GET_NDVAS(bp); d++) { \
|
|
const dva_t *dva = &bp->blk_dva[d]; \
|
|
if (DVA_IS_VALID(dva)) \
|
|
copies++; \
|
|
len += func(buf + len, size - len, \
|
|
"DVA[%d]=<%llu:%llx:%llx>%c", d, \
|
|
(u_longlong_t)DVA_GET_VDEV(dva), \
|
|
(u_longlong_t)DVA_GET_OFFSET(dva), \
|
|
(u_longlong_t)DVA_GET_ASIZE(dva), \
|
|
ws); \
|
|
} \
|
|
if (BP_IS_GANG(bp) && \
|
|
DVA_GET_ASIZE(&bp->blk_dva[2]) <= \
|
|
DVA_GET_ASIZE(&bp->blk_dva[1]) / 2) \
|
|
copies--; \
|
|
len += func(buf + len, size - len, \
|
|
"[L%llu %s] %s %s %s %s %s %s%c" \
|
|
"size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c" \
|
|
"cksum=%llx:%llx:%llx:%llx", \
|
|
(u_longlong_t)BP_GET_LEVEL(bp), \
|
|
type, \
|
|
checksum, \
|
|
compress, \
|
|
BP_GET_BYTEORDER(bp) == 0 ? "BE" : "LE", \
|
|
BP_IS_GANG(bp) ? "gang" : "contiguous", \
|
|
BP_GET_DEDUP(bp) ? "dedup" : "unique", \
|
|
copyname[copies], \
|
|
ws, \
|
|
(u_longlong_t)BP_GET_LSIZE(bp), \
|
|
(u_longlong_t)BP_GET_PSIZE(bp), \
|
|
(u_longlong_t)bp->blk_birth, \
|
|
(u_longlong_t)BP_PHYSICAL_BIRTH(bp), \
|
|
(u_longlong_t)BP_GET_FILL(bp), \
|
|
ws, \
|
|
(u_longlong_t)bp->blk_cksum.zc_word[0], \
|
|
(u_longlong_t)bp->blk_cksum.zc_word[1], \
|
|
(u_longlong_t)bp->blk_cksum.zc_word[2], \
|
|
(u_longlong_t)bp->blk_cksum.zc_word[3]); \
|
|
} \
|
|
ASSERT(len < size); \
|
|
}
|
|
|
|
#define BP_GET_BUFC_TYPE(bp) \
|
|
(BP_IS_METADATA(bp) ? ARC_BUFC_METADATA : ARC_BUFC_DATA)
|
|
|
|
typedef enum spa_import_type {
|
|
SPA_IMPORT_EXISTING,
|
|
SPA_IMPORT_ASSEMBLE
|
|
} spa_import_type_t;
|
|
|
|
/* state manipulation functions */
|
|
extern int spa_open(const char *pool, spa_t **, void *tag);
|
|
extern int spa_open_rewind(const char *pool, spa_t **, void *tag,
|
|
nvlist_t *policy, nvlist_t **config);
|
|
extern int spa_get_stats(const char *pool, nvlist_t **config, char *altroot,
|
|
size_t buflen);
|
|
extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
|
|
nvlist_t *zplprops);
|
|
extern int spa_import(char *pool, nvlist_t *config, nvlist_t *props,
|
|
uint64_t flags);
|
|
extern nvlist_t *spa_tryimport(nvlist_t *tryconfig);
|
|
extern int spa_destroy(char *pool);
|
|
extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
|
|
boolean_t hardforce);
|
|
extern int spa_reset(char *pool);
|
|
extern void spa_async_request(spa_t *spa, int flag);
|
|
extern void spa_async_unrequest(spa_t *spa, int flag);
|
|
extern void spa_async_suspend(spa_t *spa);
|
|
extern void spa_async_resume(spa_t *spa);
|
|
extern spa_t *spa_inject_addref(char *pool);
|
|
extern void spa_inject_delref(spa_t *spa);
|
|
extern void spa_scan_stat_init(spa_t *spa);
|
|
extern int spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps);
|
|
|
|
#define SPA_ASYNC_CONFIG_UPDATE 0x01
|
|
#define SPA_ASYNC_REMOVE 0x02
|
|
#define SPA_ASYNC_PROBE 0x04
|
|
#define SPA_ASYNC_RESILVER_DONE 0x08
|
|
#define SPA_ASYNC_RESILVER 0x10
|
|
#define SPA_ASYNC_AUTOEXPAND 0x20
|
|
#define SPA_ASYNC_REMOVE_DONE 0x40
|
|
#define SPA_ASYNC_REMOVE_STOP 0x80
|
|
|
|
/*
|
|
* Controls the behavior of spa_vdev_remove().
|
|
*/
|
|
#define SPA_REMOVE_UNSPARE 0x01
|
|
#define SPA_REMOVE_DONE 0x02
|
|
|
|
/* device manipulation */
|
|
extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot);
|
|
extern int spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot,
|
|
int replacing);
|
|
extern int spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid,
|
|
int replace_done);
|
|
extern int spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare);
|
|
extern boolean_t spa_vdev_remove_active(spa_t *spa);
|
|
extern int spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath);
|
|
extern int spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru);
|
|
extern int spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
|
|
nvlist_t *props, boolean_t exp);
|
|
|
|
/* spare state (which is global across all pools) */
|
|
extern void spa_spare_add(vdev_t *vd);
|
|
extern void spa_spare_remove(vdev_t *vd);
|
|
extern boolean_t spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt);
|
|
extern void spa_spare_activate(vdev_t *vd);
|
|
|
|
/* L2ARC state (which is global across all pools) */
|
|
extern void spa_l2cache_add(vdev_t *vd);
|
|
extern void spa_l2cache_remove(vdev_t *vd);
|
|
extern boolean_t spa_l2cache_exists(uint64_t guid, uint64_t *pool);
|
|
extern void spa_l2cache_activate(vdev_t *vd);
|
|
extern void spa_l2cache_drop(spa_t *spa);
|
|
|
|
/* scanning */
|
|
extern int spa_scan(spa_t *spa, pool_scan_func_t func);
|
|
extern int spa_scan_stop(spa_t *spa);
|
|
|
|
/* spa syncing */
|
|
extern void spa_sync(spa_t *spa, uint64_t txg); /* only for DMU use */
|
|
extern void spa_sync_allpools(void);
|
|
|
|
extern int zfs_sync_pass_deferred_free;
|
|
|
|
/* spa namespace global mutex */
|
|
extern kmutex_t spa_namespace_lock;
|
|
|
|
/*
|
|
* SPA configuration functions in spa_config.c
|
|
*/
|
|
|
|
#define SPA_CONFIG_UPDATE_POOL 0
|
|
#define SPA_CONFIG_UPDATE_VDEVS 1
|
|
|
|
extern void spa_config_sync(spa_t *, boolean_t, boolean_t);
|
|
extern void spa_config_load(void);
|
|
extern nvlist_t *spa_all_configs(uint64_t *);
|
|
extern void spa_config_set(spa_t *spa, nvlist_t *config);
|
|
extern nvlist_t *spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg,
|
|
int getstats);
|
|
extern void spa_config_update(spa_t *spa, int what);
|
|
|
|
/*
|
|
* Miscellaneous SPA routines in spa_misc.c
|
|
*/
|
|
|
|
/* Namespace manipulation */
|
|
extern spa_t *spa_lookup(const char *name);
|
|
extern spa_t *spa_add(const char *name, nvlist_t *config, const char *altroot);
|
|
extern void spa_remove(spa_t *spa);
|
|
extern spa_t *spa_next(spa_t *prev);
|
|
|
|
/* Refcount functions */
|
|
extern void spa_open_ref(spa_t *spa, void *tag);
|
|
extern void spa_close(spa_t *spa, void *tag);
|
|
extern void spa_async_close(spa_t *spa, void *tag);
|
|
extern boolean_t spa_refcount_zero(spa_t *spa);
|
|
|
|
#define SCL_NONE 0x00
|
|
#define SCL_CONFIG 0x01
|
|
#define SCL_STATE 0x02
|
|
#define SCL_L2ARC 0x04 /* hack until L2ARC 2.0 */
|
|
#define SCL_ALLOC 0x08
|
|
#define SCL_ZIO 0x10
|
|
#define SCL_FREE 0x20
|
|
#define SCL_VDEV 0x40
|
|
#define SCL_LOCKS 7
|
|
#define SCL_ALL ((1 << SCL_LOCKS) - 1)
|
|
#define SCL_STATE_ALL (SCL_STATE | SCL_L2ARC | SCL_ZIO)
|
|
|
|
/* Historical pool statistics */
|
|
typedef struct spa_stats_history {
|
|
kmutex_t lock;
|
|
uint64_t count;
|
|
uint64_t size;
|
|
kstat_t *kstat;
|
|
void *private;
|
|
list_t list;
|
|
} spa_stats_history_t;
|
|
|
|
typedef struct spa_stats {
|
|
spa_stats_history_t read_history;
|
|
spa_stats_history_t txg_history;
|
|
spa_stats_history_t tx_assign_histogram;
|
|
spa_stats_history_t io_history;
|
|
} spa_stats_t;
|
|
|
|
typedef enum txg_state {
|
|
TXG_STATE_BIRTH = 0,
|
|
TXG_STATE_OPEN = 1,
|
|
TXG_STATE_QUIESCED = 2,
|
|
TXG_STATE_WAIT_FOR_SYNC = 3,
|
|
TXG_STATE_SYNCED = 4,
|
|
TXG_STATE_COMMITTED = 5,
|
|
} txg_state_t;
|
|
|
|
typedef struct txg_stat {
|
|
vdev_stat_t vs1;
|
|
vdev_stat_t vs2;
|
|
uint64_t txg;
|
|
uint64_t ndirty;
|
|
} txg_stat_t;
|
|
|
|
extern void spa_stats_init(spa_t *spa);
|
|
extern void spa_stats_destroy(spa_t *spa);
|
|
extern void spa_read_history_add(spa_t *spa, const zbookmark_phys_t *zb,
|
|
uint32_t aflags);
|
|
extern void spa_txg_history_add(spa_t *spa, uint64_t txg, hrtime_t birth_time);
|
|
extern int spa_txg_history_set(spa_t *spa, uint64_t txg,
|
|
txg_state_t completed_state, hrtime_t completed_time);
|
|
extern txg_stat_t *spa_txg_history_init_io(spa_t *, uint64_t,
|
|
struct dsl_pool *);
|
|
extern void spa_txg_history_fini_io(spa_t *, txg_stat_t *);
|
|
extern void spa_tx_assign_add_nsecs(spa_t *spa, uint64_t nsecs);
|
|
|
|
/* Pool configuration locks */
|
|
extern int spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw);
|
|
extern void spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw);
|
|
extern void spa_config_exit(spa_t *spa, int locks, void *tag);
|
|
extern int spa_config_held(spa_t *spa, int locks, krw_t rw);
|
|
|
|
/* Pool vdev add/remove lock */
|
|
extern uint64_t spa_vdev_enter(spa_t *spa);
|
|
extern uint64_t spa_vdev_config_enter(spa_t *spa);
|
|
extern void spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg,
|
|
int error, char *tag);
|
|
extern int spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error);
|
|
|
|
/* Pool vdev state change lock */
|
|
extern void spa_vdev_state_enter(spa_t *spa, int oplock);
|
|
extern int spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error);
|
|
|
|
/* Log state */
|
|
typedef enum spa_log_state {
|
|
SPA_LOG_UNKNOWN = 0, /* unknown log state */
|
|
SPA_LOG_MISSING, /* missing log(s) */
|
|
SPA_LOG_CLEAR, /* clear the log(s) */
|
|
SPA_LOG_GOOD, /* log(s) are good */
|
|
} spa_log_state_t;
|
|
|
|
extern spa_log_state_t spa_get_log_state(spa_t *spa);
|
|
extern void spa_set_log_state(spa_t *spa, spa_log_state_t state);
|
|
extern int spa_offline_log(spa_t *spa);
|
|
|
|
/* Log claim callback */
|
|
extern void spa_claim_notify(zio_t *zio);
|
|
extern void spa_deadman(void *);
|
|
|
|
/* Accessor functions */
|
|
extern boolean_t spa_shutting_down(spa_t *spa);
|
|
extern struct dsl_pool *spa_get_dsl(spa_t *spa);
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extern boolean_t spa_is_initializing(spa_t *spa);
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extern blkptr_t *spa_get_rootblkptr(spa_t *spa);
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extern void spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp);
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extern void spa_altroot(spa_t *, char *, size_t);
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extern int spa_sync_pass(spa_t *spa);
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extern char *spa_name(spa_t *spa);
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extern uint64_t spa_guid(spa_t *spa);
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extern uint64_t spa_load_guid(spa_t *spa);
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extern uint64_t spa_last_synced_txg(spa_t *spa);
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extern uint64_t spa_first_txg(spa_t *spa);
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extern uint64_t spa_syncing_txg(spa_t *spa);
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extern uint64_t spa_final_dirty_txg(spa_t *spa);
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extern uint64_t spa_version(spa_t *spa);
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extern pool_state_t spa_state(spa_t *spa);
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extern spa_load_state_t spa_load_state(spa_t *spa);
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extern uint64_t spa_freeze_txg(spa_t *spa);
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extern uint64_t spa_get_worst_case_asize(spa_t *spa, uint64_t lsize);
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extern uint64_t spa_get_dspace(spa_t *spa);
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extern uint64_t spa_get_slop_space(spa_t *spa);
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extern void spa_update_dspace(spa_t *spa);
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extern uint64_t spa_version(spa_t *spa);
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extern boolean_t spa_deflate(spa_t *spa);
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extern metaslab_class_t *spa_normal_class(spa_t *spa);
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extern metaslab_class_t *spa_log_class(spa_t *spa);
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extern void spa_evicting_os_register(spa_t *, objset_t *os);
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extern void spa_evicting_os_deregister(spa_t *, objset_t *os);
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extern void spa_evicting_os_wait(spa_t *spa);
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extern int spa_max_replication(spa_t *spa);
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extern int spa_prev_software_version(spa_t *spa);
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extern uint8_t spa_get_failmode(spa_t *spa);
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extern boolean_t spa_suspended(spa_t *spa);
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extern uint64_t spa_bootfs(spa_t *spa);
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extern uint64_t spa_delegation(spa_t *spa);
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extern objset_t *spa_meta_objset(spa_t *spa);
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extern uint64_t spa_deadman_synctime(spa_t *spa);
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/* Miscellaneous support routines */
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extern void spa_activate_mos_feature(spa_t *spa, const char *feature,
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dmu_tx_t *tx);
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extern void spa_deactivate_mos_feature(spa_t *spa, const char *feature);
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extern int spa_rename(const char *oldname, const char *newname);
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extern spa_t *spa_by_guid(uint64_t pool_guid, uint64_t device_guid);
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extern boolean_t spa_guid_exists(uint64_t pool_guid, uint64_t device_guid);
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extern char *spa_strdup(const char *);
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extern void spa_strfree(char *);
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extern uint64_t spa_get_random(uint64_t range);
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extern uint64_t spa_generate_guid(spa_t *spa);
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extern void snprintf_blkptr(char *buf, size_t buflen, const blkptr_t *bp);
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extern void spa_freeze(spa_t *spa);
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extern int spa_change_guid(spa_t *spa);
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extern void spa_upgrade(spa_t *spa, uint64_t version);
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extern void spa_evict_all(void);
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extern vdev_t *spa_lookup_by_guid(spa_t *spa, uint64_t guid,
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boolean_t l2cache);
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extern boolean_t spa_has_spare(spa_t *, uint64_t guid);
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extern uint64_t dva_get_dsize_sync(spa_t *spa, const dva_t *dva);
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extern uint64_t bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp);
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extern uint64_t bp_get_dsize(spa_t *spa, const blkptr_t *bp);
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extern boolean_t spa_has_slogs(spa_t *spa);
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extern boolean_t spa_is_root(spa_t *spa);
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extern boolean_t spa_writeable(spa_t *spa);
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extern boolean_t spa_has_pending_synctask(spa_t *spa);
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extern int spa_maxblocksize(spa_t *spa);
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extern int spa_maxdnodesize(spa_t *spa);
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extern void zfs_blkptr_verify(spa_t *spa, const blkptr_t *bp);
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extern int spa_mode(spa_t *spa);
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extern uint64_t strtonum(const char *str, char **nptr);
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extern char *spa_his_ievent_table[];
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extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx);
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extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read,
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char *his_buf);
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extern int spa_history_log(spa_t *spa, const char *his_buf);
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extern int spa_history_log_nvl(spa_t *spa, nvlist_t *nvl);
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extern void spa_history_log_version(spa_t *spa, const char *operation);
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extern void spa_history_log_internal(spa_t *spa, const char *operation,
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dmu_tx_t *tx, const char *fmt, ...);
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extern void spa_history_log_internal_ds(struct dsl_dataset *ds, const char *op,
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dmu_tx_t *tx, const char *fmt, ...);
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extern void spa_history_log_internal_dd(dsl_dir_t *dd, const char *operation,
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dmu_tx_t *tx, const char *fmt, ...);
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/* error handling */
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struct zbookmark_phys;
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extern void spa_log_error(spa_t *spa, zio_t *zio);
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extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd,
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zio_t *zio, uint64_t stateoroffset, uint64_t length);
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extern void zfs_post_remove(spa_t *spa, vdev_t *vd);
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extern void zfs_post_state_change(spa_t *spa, vdev_t *vd, uint64_t laststate);
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extern void zfs_post_autoreplace(spa_t *spa, vdev_t *vd);
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extern void zfs_post_sysevent(spa_t *spa, vdev_t *vd, const char *name);
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extern uint64_t spa_get_errlog_size(spa_t *spa);
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extern int spa_get_errlog(spa_t *spa, void *uaddr, size_t *count);
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extern void spa_errlog_rotate(spa_t *spa);
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extern void spa_errlog_drain(spa_t *spa);
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extern void spa_errlog_sync(spa_t *spa, uint64_t txg);
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extern void spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub);
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/* vdev cache */
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extern void vdev_cache_stat_init(void);
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extern void vdev_cache_stat_fini(void);
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/* Initialization and termination */
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extern void spa_init(int flags);
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extern void spa_fini(void);
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extern void spa_boot_init(void);
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/* properties */
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extern int spa_prop_set(spa_t *spa, nvlist_t *nvp);
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extern int spa_prop_get(spa_t *spa, nvlist_t **nvp);
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extern void spa_prop_clear_bootfs(spa_t *spa, uint64_t obj, dmu_tx_t *tx);
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extern void spa_configfile_set(spa_t *, nvlist_t *, boolean_t);
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/* asynchronous event notification */
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extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name);
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#ifdef ZFS_DEBUG
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#define dprintf_bp(bp, fmt, ...) do { \
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if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
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char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \
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snprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \
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dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \
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kmem_free(__blkbuf, BP_SPRINTF_LEN); \
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} \
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_NOTE(CONSTCOND) } while (0)
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#else
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#define dprintf_bp(bp, fmt, ...)
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#endif
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extern boolean_t spa_debug_enabled(spa_t *spa);
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#define spa_dbgmsg(spa, ...) \
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{ \
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if (spa_debug_enabled(spa)) \
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zfs_dbgmsg(__VA_ARGS__); \
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}
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extern int spa_mode_global; /* mode, e.g. FREAD | FWRITE */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_SPA_H */
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