1807 lines
61 KiB
C
1807 lines
61 KiB
C
/*-
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* Copyright (c) 2002 McAfee, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Marshall
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* Kirk McKusick and McAfee Research,, the Security Research Division of
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* McAfee, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as
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* part of the DARPA CHATS research program
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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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 2009 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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/*
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* Copyright 2013 by Saso Kiselkov. All rights reserved.
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*/
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/*
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* Copyright (c) 2013 by Delphix. All rights reserved.
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*/
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#define MAXNAMELEN 256
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#define _NOTE(s)
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/*
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* AVL comparator helpers
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*/
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#define AVL_ISIGN(a) (((a) > 0) - ((a) < 0))
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#define AVL_CMP(a, b) (((a) > (b)) - ((a) < (b)))
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#define AVL_PCMP(a, b) \
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(((uintptr_t)(a) > (uintptr_t)(b)) - ((uintptr_t)(a) < (uintptr_t)(b)))
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typedef enum { B_FALSE, B_TRUE } boolean_t;
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/* CRC64 table */
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#define ZFS_CRC64_POLY 0xC96C5795D7870F42ULL /* ECMA-182, reflected form */
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/*
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* Macros for various sorts of alignment and rounding when the alignment
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* is known to be a power of 2.
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*/
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#define P2ALIGN(x, align) ((x) & -(align))
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#define P2PHASE(x, align) ((x) & ((align) - 1))
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#define P2NPHASE(x, align) (-(x) & ((align) - 1))
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#define P2ROUNDUP(x, align) (-(-(x) & -(align)))
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#define P2END(x, align) (-(~(x) & -(align)))
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#define P2PHASEUP(x, align, phase) ((phase) - (((phase) - (x)) & -(align)))
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#define P2BOUNDARY(off, len, align) (((off) ^ ((off) + (len) - 1)) > (align) - 1)
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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) \
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((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len))
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#define BF64_SET(x, low, len, val) \
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((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len))
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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) \
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BF32_SET(x, low, len, ((val) >> (shift)) - (bias))
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#define BF64_SET_SB(x, low, len, shift, bias, val) \
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BF64_SET(x, low, len, ((val) >> (shift)) - (bias))
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/*
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* Macros to reverse byte order
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*/
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#define BSWAP_8(x) ((x) & 0xff)
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#define BSWAP_16(x) ((BSWAP_8(x) << 8) | BSWAP_8((x) >> 8))
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#define BSWAP_32(x) ((BSWAP_16(x) << 16) | BSWAP_16((x) >> 16))
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#define BSWAP_64(x) ((BSWAP_32(x) << 32) | BSWAP_32((x) >> 32))
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#define SPA_MINBLOCKSHIFT 9
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#define SPA_OLDMAXBLOCKSHIFT 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_OLDMAXBLOCKSIZE (1ULL << SPA_OLDMAXBLOCKSHIFT)
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#define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT)
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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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/*
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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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* Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
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*/
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typedef struct zio_cksum {
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uint64_t zc_word[4];
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} zio_cksum_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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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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BF64_GET_SB((bp)->blk_prop, 16, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1)
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#define BP_SET_PSIZE(bp, x) \
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BF64_SET_SB((bp)->blk_prop, 16, SPA_LSIZEBITS, SPA_MINBLOCKSHIFT, 1, x)
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#define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 7)
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#define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 7, x)
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#define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8)
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#define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x)
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#define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8)
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#define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x)
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#define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
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#define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)
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#define BP_IS_EMBEDDED(bp) BF64_GET((bp)->blk_prop, 39, 1)
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#define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1)
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#define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x)
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#define BP_GET_BYTEORDER(bp) BF64_GET((bp)->blk_prop, 63, 1)
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#define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x)
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#define BP_PHYSICAL_BIRTH(bp) \
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((bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth)
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#define BP_GET_ASIZE(bp) \
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(DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
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|
DVA_GET_ASIZE(&(bp)->blk_dva[2]))
|
|
|
|
#define BP_GET_UCSIZE(bp) \
|
|
((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \
|
|
BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp));
|
|
|
|
#define BP_GET_NDVAS(bp) \
|
|
(!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
|
|
!!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
|
|
!!DVA_GET_ASIZE(&(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 ZIO_CHECKSUM_EQUAL(zc1, zc2) \
|
|
(0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) | \
|
|
((zc1).zc_word[1] - (zc2).zc_word[1]) | \
|
|
((zc1).zc_word[2] - (zc2).zc_word[2]) | \
|
|
((zc1).zc_word[3] - (zc2).zc_word[3])))
|
|
|
|
|
|
#define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0)
|
|
|
|
#define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \
|
|
{ \
|
|
(zcp)->zc_word[0] = w0; \
|
|
(zcp)->zc_word[1] = w1; \
|
|
(zcp)->zc_word[2] = w2; \
|
|
(zcp)->zc_word[3] = w3; \
|
|
}
|
|
|
|
#define BP_IDENTITY(bp) (&(bp)->blk_dva[0])
|
|
#define BP_IS_GANG(bp) 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) DVA_IS_EMPTY(BP_IDENTITY(bp))
|
|
#define BP_IS_OLDER(bp, txg) (!BP_IS_HOLE(bp) && (bp)->blk_birth < (txg))
|
|
|
|
#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); \
|
|
}
|
|
|
|
#if BYTE_ORDER == _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 BPE_NUM_WORDS 14
|
|
#define BPE_PAYLOAD_SIZE (BPE_NUM_WORDS * sizeof (uint64_t))
|
|
#define BPE_IS_PAYLOADWORD(bp, wp) \
|
|
((wp) != &(bp)->blk_prop && (wp) != &(bp)->blk_birth)
|
|
|
|
/*
|
|
* Embedded checksum
|
|
*/
|
|
#define ZEC_MAGIC 0x210da7ab10c7a11ULL
|
|
|
|
typedef struct zio_eck {
|
|
uint64_t zec_magic; /* for validation, endianness */
|
|
zio_cksum_t zec_cksum; /* 256-bit checksum */
|
|
} zio_eck_t;
|
|
|
|
/*
|
|
* Gang block headers are self-checksumming and contain an array
|
|
* of block pointers.
|
|
*/
|
|
#define SPA_GANGBLOCKSIZE SPA_MINBLOCKSIZE
|
|
#define SPA_GBH_NBLKPTRS ((SPA_GANGBLOCKSIZE - \
|
|
sizeof (zio_eck_t)) / sizeof (blkptr_t))
|
|
#define SPA_GBH_FILLER ((SPA_GANGBLOCKSIZE - \
|
|
sizeof (zio_eck_t) - \
|
|
(SPA_GBH_NBLKPTRS * sizeof (blkptr_t))) /\
|
|
sizeof (uint64_t))
|
|
|
|
typedef struct zio_gbh {
|
|
blkptr_t zg_blkptr[SPA_GBH_NBLKPTRS];
|
|
uint64_t zg_filler[SPA_GBH_FILLER];
|
|
zio_eck_t zg_tail;
|
|
} zio_gbh_phys_t;
|
|
|
|
#define VDEV_RAIDZ_MAXPARITY 3
|
|
|
|
#define VDEV_PAD_SIZE (8 << 10)
|
|
/* 2 padding areas (vl_pad1 and vl_pad2) to skip */
|
|
#define VDEV_SKIP_SIZE VDEV_PAD_SIZE * 2
|
|
#define VDEV_PHYS_SIZE (112 << 10)
|
|
#define VDEV_UBERBLOCK_RING (128 << 10)
|
|
|
|
/*
|
|
* MMP blocks occupy the last MMP_BLOCKS_PER_LABEL slots in the uberblock
|
|
* ring when MMP is enabled.
|
|
*/
|
|
#define MMP_BLOCKS_PER_LABEL 1
|
|
|
|
/* The largest uberblock we support is 8k. */
|
|
#define MAX_UBERBLOCK_SHIFT (13)
|
|
#define VDEV_UBERBLOCK_SHIFT(vd) \
|
|
MIN(MAX((vd)->v_top->v_ashift, UBERBLOCK_SHIFT), MAX_UBERBLOCK_SHIFT)
|
|
#define VDEV_UBERBLOCK_COUNT(vd) \
|
|
(VDEV_UBERBLOCK_RING >> VDEV_UBERBLOCK_SHIFT(vd))
|
|
#define VDEV_UBERBLOCK_OFFSET(vd, n) \
|
|
offsetof(vdev_label_t, vl_uberblock[(n) << VDEV_UBERBLOCK_SHIFT(vd)])
|
|
#define VDEV_UBERBLOCK_SIZE(vd) (1ULL << VDEV_UBERBLOCK_SHIFT(vd))
|
|
|
|
typedef struct vdev_phys {
|
|
char vp_nvlist[VDEV_PHYS_SIZE - sizeof (zio_eck_t)];
|
|
zio_eck_t vp_zbt;
|
|
} vdev_phys_t;
|
|
|
|
typedef struct vdev_label {
|
|
char vl_pad1[VDEV_PAD_SIZE]; /* 8K */
|
|
char vl_pad2[VDEV_PAD_SIZE]; /* 8K */
|
|
vdev_phys_t vl_vdev_phys; /* 112K */
|
|
char vl_uberblock[VDEV_UBERBLOCK_RING]; /* 128K */
|
|
} vdev_label_t; /* 256K total */
|
|
|
|
/*
|
|
* vdev_dirty() flags
|
|
*/
|
|
#define VDD_METASLAB 0x01
|
|
#define VDD_DTL 0x02
|
|
|
|
/*
|
|
* Size and offset of embedded boot loader region on each label.
|
|
* The total size of the first two labels plus the boot area is 4MB.
|
|
*/
|
|
#define VDEV_BOOT_OFFSET (2 * sizeof (vdev_label_t))
|
|
#define VDEV_BOOT_SIZE (7ULL << 19) /* 3.5M */
|
|
|
|
/*
|
|
* Size of label regions at the start and end of each leaf device.
|
|
*/
|
|
#define VDEV_LABEL_START_SIZE (2 * sizeof (vdev_label_t) + VDEV_BOOT_SIZE)
|
|
#define VDEV_LABEL_END_SIZE (2 * sizeof (vdev_label_t))
|
|
#define VDEV_LABELS 4
|
|
|
|
enum zio_checksum {
|
|
ZIO_CHECKSUM_INHERIT = 0,
|
|
ZIO_CHECKSUM_ON,
|
|
ZIO_CHECKSUM_OFF,
|
|
ZIO_CHECKSUM_LABEL,
|
|
ZIO_CHECKSUM_GANG_HEADER,
|
|
ZIO_CHECKSUM_ZILOG,
|
|
ZIO_CHECKSUM_FLETCHER_2,
|
|
ZIO_CHECKSUM_FLETCHER_4,
|
|
ZIO_CHECKSUM_SHA256,
|
|
ZIO_CHECKSUM_ZILOG2,
|
|
ZIO_CHECKSUM_NOPARITY,
|
|
ZIO_CHECKSUM_SHA512,
|
|
ZIO_CHECKSUM_SKEIN,
|
|
ZIO_CHECKSUM_EDONR,
|
|
ZIO_CHECKSUM_FUNCTIONS
|
|
};
|
|
|
|
#define ZIO_CHECKSUM_ON_VALUE ZIO_CHECKSUM_FLETCHER_4
|
|
#define ZIO_CHECKSUM_DEFAULT ZIO_CHECKSUM_ON
|
|
|
|
enum zio_compress {
|
|
ZIO_COMPRESS_INHERIT = 0,
|
|
ZIO_COMPRESS_ON,
|
|
ZIO_COMPRESS_OFF,
|
|
ZIO_COMPRESS_LZJB,
|
|
ZIO_COMPRESS_EMPTY,
|
|
ZIO_COMPRESS_GZIP_1,
|
|
ZIO_COMPRESS_GZIP_2,
|
|
ZIO_COMPRESS_GZIP_3,
|
|
ZIO_COMPRESS_GZIP_4,
|
|
ZIO_COMPRESS_GZIP_5,
|
|
ZIO_COMPRESS_GZIP_6,
|
|
ZIO_COMPRESS_GZIP_7,
|
|
ZIO_COMPRESS_GZIP_8,
|
|
ZIO_COMPRESS_GZIP_9,
|
|
ZIO_COMPRESS_ZLE,
|
|
ZIO_COMPRESS_LZ4,
|
|
ZIO_COMPRESS_FUNCTIONS
|
|
};
|
|
|
|
#define ZIO_COMPRESS_ON_VALUE ZIO_COMPRESS_LZJB
|
|
#define ZIO_COMPRESS_DEFAULT ZIO_COMPRESS_OFF
|
|
|
|
/* nvlist pack encoding */
|
|
#define NV_ENCODE_NATIVE 0
|
|
#define NV_ENCODE_XDR 1
|
|
|
|
typedef enum {
|
|
DATA_TYPE_UNKNOWN = 0,
|
|
DATA_TYPE_BOOLEAN,
|
|
DATA_TYPE_BYTE,
|
|
DATA_TYPE_INT16,
|
|
DATA_TYPE_UINT16,
|
|
DATA_TYPE_INT32,
|
|
DATA_TYPE_UINT32,
|
|
DATA_TYPE_INT64,
|
|
DATA_TYPE_UINT64,
|
|
DATA_TYPE_STRING,
|
|
DATA_TYPE_BYTE_ARRAY,
|
|
DATA_TYPE_INT16_ARRAY,
|
|
DATA_TYPE_UINT16_ARRAY,
|
|
DATA_TYPE_INT32_ARRAY,
|
|
DATA_TYPE_UINT32_ARRAY,
|
|
DATA_TYPE_INT64_ARRAY,
|
|
DATA_TYPE_UINT64_ARRAY,
|
|
DATA_TYPE_STRING_ARRAY,
|
|
DATA_TYPE_HRTIME,
|
|
DATA_TYPE_NVLIST,
|
|
DATA_TYPE_NVLIST_ARRAY,
|
|
DATA_TYPE_BOOLEAN_VALUE,
|
|
DATA_TYPE_INT8,
|
|
DATA_TYPE_UINT8,
|
|
DATA_TYPE_BOOLEAN_ARRAY,
|
|
DATA_TYPE_INT8_ARRAY,
|
|
DATA_TYPE_UINT8_ARRAY
|
|
} data_type_t;
|
|
|
|
/*
|
|
* On-disk version number.
|
|
*/
|
|
#define SPA_VERSION_1 1ULL
|
|
#define SPA_VERSION_2 2ULL
|
|
#define SPA_VERSION_3 3ULL
|
|
#define SPA_VERSION_4 4ULL
|
|
#define SPA_VERSION_5 5ULL
|
|
#define SPA_VERSION_6 6ULL
|
|
#define SPA_VERSION_7 7ULL
|
|
#define SPA_VERSION_8 8ULL
|
|
#define SPA_VERSION_9 9ULL
|
|
#define SPA_VERSION_10 10ULL
|
|
#define SPA_VERSION_11 11ULL
|
|
#define SPA_VERSION_12 12ULL
|
|
#define SPA_VERSION_13 13ULL
|
|
#define SPA_VERSION_14 14ULL
|
|
#define SPA_VERSION_15 15ULL
|
|
#define SPA_VERSION_16 16ULL
|
|
#define SPA_VERSION_17 17ULL
|
|
#define SPA_VERSION_18 18ULL
|
|
#define SPA_VERSION_19 19ULL
|
|
#define SPA_VERSION_20 20ULL
|
|
#define SPA_VERSION_21 21ULL
|
|
#define SPA_VERSION_22 22ULL
|
|
#define SPA_VERSION_23 23ULL
|
|
#define SPA_VERSION_24 24ULL
|
|
#define SPA_VERSION_25 25ULL
|
|
#define SPA_VERSION_26 26ULL
|
|
#define SPA_VERSION_27 27ULL
|
|
#define SPA_VERSION_28 28ULL
|
|
#define SPA_VERSION_5000 5000ULL
|
|
|
|
/*
|
|
* When bumping up SPA_VERSION, make sure GRUB ZFS understands the on-disk
|
|
* format change. Go to usr/src/grub/grub-0.97/stage2/{zfs-include/, fsys_zfs*},
|
|
* and do the appropriate changes. Also bump the version number in
|
|
* usr/src/grub/capability.
|
|
*/
|
|
#define SPA_VERSION SPA_VERSION_5000
|
|
#define SPA_VERSION_STRING "5000"
|
|
|
|
/*
|
|
* Symbolic names for the changes that caused a SPA_VERSION switch.
|
|
* Used in the code when checking for presence or absence of a feature.
|
|
* Feel free to define multiple symbolic names for each version if there
|
|
* were multiple changes to on-disk structures during that version.
|
|
*
|
|
* NOTE: When checking the current SPA_VERSION in your code, be sure
|
|
* to use spa_version() since it reports the version of the
|
|
* last synced uberblock. Checking the in-flight version can
|
|
* be dangerous in some cases.
|
|
*/
|
|
#define SPA_VERSION_INITIAL SPA_VERSION_1
|
|
#define SPA_VERSION_DITTO_BLOCKS SPA_VERSION_2
|
|
#define SPA_VERSION_SPARES SPA_VERSION_3
|
|
#define SPA_VERSION_RAID6 SPA_VERSION_3
|
|
#define SPA_VERSION_BPLIST_ACCOUNT SPA_VERSION_3
|
|
#define SPA_VERSION_RAIDZ_DEFLATE SPA_VERSION_3
|
|
#define SPA_VERSION_DNODE_BYTES SPA_VERSION_3
|
|
#define SPA_VERSION_ZPOOL_HISTORY SPA_VERSION_4
|
|
#define SPA_VERSION_GZIP_COMPRESSION SPA_VERSION_5
|
|
#define SPA_VERSION_BOOTFS SPA_VERSION_6
|
|
#define SPA_VERSION_SLOGS SPA_VERSION_7
|
|
#define SPA_VERSION_DELEGATED_PERMS SPA_VERSION_8
|
|
#define SPA_VERSION_FUID SPA_VERSION_9
|
|
#define SPA_VERSION_REFRESERVATION SPA_VERSION_9
|
|
#define SPA_VERSION_REFQUOTA SPA_VERSION_9
|
|
#define SPA_VERSION_UNIQUE_ACCURATE SPA_VERSION_9
|
|
#define SPA_VERSION_L2CACHE SPA_VERSION_10
|
|
#define SPA_VERSION_NEXT_CLONES SPA_VERSION_11
|
|
#define SPA_VERSION_ORIGIN SPA_VERSION_11
|
|
#define SPA_VERSION_DSL_SCRUB SPA_VERSION_11
|
|
#define SPA_VERSION_SNAP_PROPS SPA_VERSION_12
|
|
#define SPA_VERSION_USED_BREAKDOWN SPA_VERSION_13
|
|
#define SPA_VERSION_PASSTHROUGH_X SPA_VERSION_14
|
|
#define SPA_VERSION_USERSPACE SPA_VERSION_15
|
|
#define SPA_VERSION_STMF_PROP SPA_VERSION_16
|
|
#define SPA_VERSION_RAIDZ3 SPA_VERSION_17
|
|
#define SPA_VERSION_USERREFS SPA_VERSION_18
|
|
#define SPA_VERSION_HOLES SPA_VERSION_19
|
|
#define SPA_VERSION_ZLE_COMPRESSION SPA_VERSION_20
|
|
#define SPA_VERSION_DEDUP SPA_VERSION_21
|
|
#define SPA_VERSION_RECVD_PROPS SPA_VERSION_22
|
|
#define SPA_VERSION_SLIM_ZIL SPA_VERSION_23
|
|
#define SPA_VERSION_SA SPA_VERSION_24
|
|
#define SPA_VERSION_SCAN SPA_VERSION_25
|
|
#define SPA_VERSION_DIR_CLONES SPA_VERSION_26
|
|
#define SPA_VERSION_DEADLISTS SPA_VERSION_26
|
|
#define SPA_VERSION_FAST_SNAP SPA_VERSION_27
|
|
#define SPA_VERSION_MULTI_REPLACE SPA_VERSION_28
|
|
#define SPA_VERSION_BEFORE_FEATURES SPA_VERSION_28
|
|
#define SPA_VERSION_FEATURES SPA_VERSION_5000
|
|
|
|
#define SPA_VERSION_IS_SUPPORTED(v) \
|
|
(((v) >= SPA_VERSION_INITIAL && (v) <= SPA_VERSION_BEFORE_FEATURES) || \
|
|
((v) >= SPA_VERSION_FEATURES && (v) <= SPA_VERSION))
|
|
|
|
/*
|
|
* The following are configuration names used in the nvlist describing a pool's
|
|
* configuration.
|
|
*/
|
|
#define ZPOOL_CONFIG_VERSION "version"
|
|
#define ZPOOL_CONFIG_POOL_NAME "name"
|
|
#define ZPOOL_CONFIG_POOL_STATE "state"
|
|
#define ZPOOL_CONFIG_POOL_TXG "txg"
|
|
#define ZPOOL_CONFIG_POOL_GUID "pool_guid"
|
|
#define ZPOOL_CONFIG_CREATE_TXG "create_txg"
|
|
#define ZPOOL_CONFIG_TOP_GUID "top_guid"
|
|
#define ZPOOL_CONFIG_VDEV_TREE "vdev_tree"
|
|
#define ZPOOL_CONFIG_TYPE "type"
|
|
#define ZPOOL_CONFIG_CHILDREN "children"
|
|
#define ZPOOL_CONFIG_ID "id"
|
|
#define ZPOOL_CONFIG_GUID "guid"
|
|
#define ZPOOL_CONFIG_INDIRECT_OBJECT "com.delphix:indirect_object"
|
|
#define ZPOOL_CONFIG_INDIRECT_BIRTHS "com.delphix:indirect_births"
|
|
#define ZPOOL_CONFIG_PREV_INDIRECT_VDEV "com.delphix:prev_indirect_vdev"
|
|
#define ZPOOL_CONFIG_PATH "path"
|
|
#define ZPOOL_CONFIG_DEVID "devid"
|
|
#define ZPOOL_CONFIG_METASLAB_ARRAY "metaslab_array"
|
|
#define ZPOOL_CONFIG_METASLAB_SHIFT "metaslab_shift"
|
|
#define ZPOOL_CONFIG_ASHIFT "ashift"
|
|
#define ZPOOL_CONFIG_ASIZE "asize"
|
|
#define ZPOOL_CONFIG_DTL "DTL"
|
|
#define ZPOOL_CONFIG_STATS "stats"
|
|
#define ZPOOL_CONFIG_WHOLE_DISK "whole_disk"
|
|
#define ZPOOL_CONFIG_ERRCOUNT "error_count"
|
|
#define ZPOOL_CONFIG_NOT_PRESENT "not_present"
|
|
#define ZPOOL_CONFIG_SPARES "spares"
|
|
#define ZPOOL_CONFIG_IS_SPARE "is_spare"
|
|
#define ZPOOL_CONFIG_NPARITY "nparity"
|
|
#define ZPOOL_CONFIG_HOSTID "hostid"
|
|
#define ZPOOL_CONFIG_HOSTNAME "hostname"
|
|
#define ZPOOL_CONFIG_IS_LOG "is_log"
|
|
#define ZPOOL_CONFIG_TIMESTAMP "timestamp" /* not stored on disk */
|
|
#define ZPOOL_CONFIG_FEATURES_FOR_READ "features_for_read"
|
|
|
|
/*
|
|
* The persistent vdev state is stored as separate values rather than a single
|
|
* 'vdev_state' entry. This is because a device can be in multiple states, such
|
|
* as offline and degraded.
|
|
*/
|
|
#define ZPOOL_CONFIG_OFFLINE "offline"
|
|
#define ZPOOL_CONFIG_FAULTED "faulted"
|
|
#define ZPOOL_CONFIG_DEGRADED "degraded"
|
|
#define ZPOOL_CONFIG_REMOVED "removed"
|
|
#define ZPOOL_CONFIG_FRU "fru"
|
|
#define ZPOOL_CONFIG_AUX_STATE "aux_state"
|
|
|
|
#define VDEV_TYPE_ROOT "root"
|
|
#define VDEV_TYPE_MIRROR "mirror"
|
|
#define VDEV_TYPE_REPLACING "replacing"
|
|
#define VDEV_TYPE_RAIDZ "raidz"
|
|
#define VDEV_TYPE_DISK "disk"
|
|
#define VDEV_TYPE_FILE "file"
|
|
#define VDEV_TYPE_MISSING "missing"
|
|
#define VDEV_TYPE_HOLE "hole"
|
|
#define VDEV_TYPE_SPARE "spare"
|
|
#define VDEV_TYPE_LOG "log"
|
|
#define VDEV_TYPE_L2CACHE "l2cache"
|
|
#define VDEV_TYPE_INDIRECT "indirect"
|
|
|
|
/*
|
|
* This is needed in userland to report the minimum necessary device size.
|
|
*/
|
|
#define SPA_MINDEVSIZE (64ULL << 20)
|
|
|
|
/*
|
|
* The location of the pool configuration repository, shared between kernel and
|
|
* userland.
|
|
*/
|
|
#define ZPOOL_CACHE "/boot/zfs/zpool.cache"
|
|
|
|
/*
|
|
* vdev states are ordered from least to most healthy.
|
|
* A vdev that's CANT_OPEN or below is considered unusable.
|
|
*/
|
|
typedef enum vdev_state {
|
|
VDEV_STATE_UNKNOWN = 0, /* Uninitialized vdev */
|
|
VDEV_STATE_CLOSED, /* Not currently open */
|
|
VDEV_STATE_OFFLINE, /* Not allowed to open */
|
|
VDEV_STATE_REMOVED, /* Explicitly removed from system */
|
|
VDEV_STATE_CANT_OPEN, /* Tried to open, but failed */
|
|
VDEV_STATE_FAULTED, /* External request to fault device */
|
|
VDEV_STATE_DEGRADED, /* Replicated vdev with unhealthy kids */
|
|
VDEV_STATE_HEALTHY /* Presumed good */
|
|
} vdev_state_t;
|
|
|
|
/*
|
|
* vdev aux states. When a vdev is in the CANT_OPEN state, the aux field
|
|
* of the vdev stats structure uses these constants to distinguish why.
|
|
*/
|
|
typedef enum vdev_aux {
|
|
VDEV_AUX_NONE, /* no error */
|
|
VDEV_AUX_OPEN_FAILED, /* ldi_open_*() or vn_open() failed */
|
|
VDEV_AUX_CORRUPT_DATA, /* bad label or disk contents */
|
|
VDEV_AUX_NO_REPLICAS, /* insufficient number of replicas */
|
|
VDEV_AUX_BAD_GUID_SUM, /* vdev guid sum doesn't match */
|
|
VDEV_AUX_TOO_SMALL, /* vdev size is too small */
|
|
VDEV_AUX_BAD_LABEL, /* the label is OK but invalid */
|
|
VDEV_AUX_VERSION_NEWER, /* on-disk version is too new */
|
|
VDEV_AUX_VERSION_OLDER, /* on-disk version is too old */
|
|
VDEV_AUX_SPARED /* hot spare used in another pool */
|
|
} vdev_aux_t;
|
|
|
|
/*
|
|
* pool state. The following states are written to disk as part of the normal
|
|
* SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE. The remaining states are
|
|
* software abstractions used at various levels to communicate pool state.
|
|
*/
|
|
typedef enum pool_state {
|
|
POOL_STATE_ACTIVE = 0, /* In active use */
|
|
POOL_STATE_EXPORTED, /* Explicitly exported */
|
|
POOL_STATE_DESTROYED, /* Explicitly destroyed */
|
|
POOL_STATE_SPARE, /* Reserved for hot spare use */
|
|
POOL_STATE_UNINITIALIZED, /* Internal spa_t state */
|
|
POOL_STATE_UNAVAIL, /* Internal libzfs state */
|
|
POOL_STATE_POTENTIALLY_ACTIVE /* Internal libzfs state */
|
|
} pool_state_t;
|
|
|
|
/*
|
|
* The uberblock version is incremented whenever an incompatible on-disk
|
|
* format change is made to the SPA, DMU, or ZAP.
|
|
*
|
|
* Note: the first two fields should never be moved. When a storage pool
|
|
* is opened, the uberblock must be read off the disk before the version
|
|
* can be checked. If the ub_version field is moved, we may not detect
|
|
* version mismatch. If the ub_magic field is moved, applications that
|
|
* expect the magic number in the first word won't work.
|
|
*/
|
|
#define UBERBLOCK_MAGIC 0x00bab10c /* oo-ba-bloc! */
|
|
#define UBERBLOCK_SHIFT 10 /* up to 1K */
|
|
|
|
#define MMP_MAGIC 0xa11cea11 /* all-see-all */
|
|
|
|
#define MMP_INTERVAL_VALID_BIT 0x01
|
|
#define MMP_SEQ_VALID_BIT 0x02
|
|
#define MMP_FAIL_INT_VALID_BIT 0x04
|
|
|
|
#define MMP_VALID(ubp) (ubp->ub_magic == UBERBLOCK_MAGIC && \
|
|
ubp->ub_mmp_magic == MMP_MAGIC)
|
|
#define MMP_INTERVAL_VALID(ubp) (MMP_VALID(ubp) && (ubp->ub_mmp_config & \
|
|
MMP_INTERVAL_VALID_BIT))
|
|
#define MMP_SEQ_VALID(ubp) (MMP_VALID(ubp) && (ubp->ub_mmp_config & \
|
|
MMP_SEQ_VALID_BIT))
|
|
#define MMP_FAIL_INT_VALID(ubp) (MMP_VALID(ubp) && (ubp->ub_mmp_config & \
|
|
MMP_FAIL_INT_VALID_BIT))
|
|
|
|
#define MMP_INTERVAL(ubp) ((ubp->ub_mmp_config & 0x00000000FFFFFF00) \
|
|
>> 8)
|
|
#define MMP_SEQ(ubp) ((ubp->ub_mmp_config & 0x0000FFFF00000000) \
|
|
>> 32)
|
|
#define MMP_FAIL_INT(ubp) ((ubp->ub_mmp_config & 0xFFFF000000000000) \
|
|
>> 48)
|
|
|
|
typedef struct uberblock {
|
|
uint64_t ub_magic; /* UBERBLOCK_MAGIC */
|
|
uint64_t ub_version; /* SPA_VERSION */
|
|
uint64_t ub_txg; /* txg of last sync */
|
|
uint64_t ub_guid_sum; /* sum of all vdev guids */
|
|
uint64_t ub_timestamp; /* UTC time of last sync */
|
|
blkptr_t ub_rootbp; /* MOS objset_phys_t */
|
|
/* highest SPA_VERSION supported by software that wrote this txg */
|
|
uint64_t ub_software_version;
|
|
/* Maybe missing in uberblocks we read, but always written */
|
|
uint64_t ub_mmp_magic;
|
|
/*
|
|
* If ub_mmp_delay == 0 and ub_mmp_magic is valid, MMP is off.
|
|
* Otherwise, nanosec since last MMP write.
|
|
*/
|
|
uint64_t ub_mmp_delay;
|
|
|
|
/*
|
|
* The ub_mmp_config contains the multihost write interval, multihost
|
|
* fail intervals, sequence number for sub-second granularity, and
|
|
* valid bit mask. This layout is as follows:
|
|
*
|
|
* 64 56 48 40 32 24 16 8 0
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
* 0 | Fail Intervals| Seq | Write Interval (ms) | VALID |
|
|
* +-------+-------+-------+-------+-------+-------+-------+-------+
|
|
*
|
|
* This allows a write_interval of (2^24/1000)s, over 4.5 hours
|
|
*
|
|
* VALID Bits:
|
|
* - 0x01 - Write Interval (ms)
|
|
* - 0x02 - Sequence number exists
|
|
* - 0x04 - Fail Intervals
|
|
* - 0xf8 - Reserved
|
|
*/
|
|
uint64_t ub_mmp_config;
|
|
|
|
/*
|
|
* ub_checkpoint_txg indicates two things about the current uberblock:
|
|
*
|
|
* 1] If it is not zero then this uberblock is a checkpoint. If it is
|
|
* zero, then this uberblock is not a checkpoint.
|
|
*
|
|
* 2] On checkpointed uberblocks, the value of ub_checkpoint_txg is
|
|
* the ub_txg that the uberblock had at the time we moved it to
|
|
* the MOS config.
|
|
*
|
|
* The field is set when we checkpoint the uberblock and continues to
|
|
* hold that value even after we've rewound (unlike the ub_txg that
|
|
* is reset to a higher value).
|
|
*
|
|
* Besides checks used to determine whether we are reopening the
|
|
* pool from a checkpointed uberblock [see spa_ld_select_uberblock()],
|
|
* the value of the field is used to determine which ZIL blocks have
|
|
* been allocated according to the ms_sm when we are rewinding to a
|
|
* checkpoint. Specifically, if blk_birth > ub_checkpoint_txg, then
|
|
* the ZIL block is not allocated [see uses of spa_min_claim_txg()].
|
|
*/
|
|
uint64_t ub_checkpoint_txg;
|
|
} uberblock_t;
|
|
|
|
/*
|
|
* Flags.
|
|
*/
|
|
#define DNODE_MUST_BE_ALLOCATED 1
|
|
#define DNODE_MUST_BE_FREE 2
|
|
|
|
/*
|
|
* Fixed constants.
|
|
*/
|
|
#define DNODE_SHIFT 9 /* 512 bytes */
|
|
#define DN_MIN_INDBLKSHIFT 12 /* 4k */
|
|
#define DN_MAX_INDBLKSHIFT 17 /* 128k */
|
|
#define DNODE_BLOCK_SHIFT 14 /* 16k */
|
|
#define DNODE_CORE_SIZE 64 /* 64 bytes for dnode sans blkptrs */
|
|
#define DN_MAX_OBJECT_SHIFT 48 /* 256 trillion (zfs_fid_t limit) */
|
|
#define DN_MAX_OFFSET_SHIFT 64 /* 2^64 bytes in a dnode */
|
|
|
|
/*
|
|
* Derived constants.
|
|
*/
|
|
#define DNODE_MIN_SIZE (1 << DNODE_SHIFT)
|
|
#define DNODE_MAX_SIZE (1 << DNODE_BLOCK_SHIFT)
|
|
#define DNODE_BLOCK_SIZE (1 << DNODE_BLOCK_SHIFT)
|
|
#define DNODE_MIN_SLOTS (DNODE_MIN_SIZE >> DNODE_SHIFT)
|
|
#define DNODE_MAX_SLOTS (DNODE_MAX_SIZE >> DNODE_SHIFT)
|
|
#define DN_BONUS_SIZE(dnsize) ((dnsize) - DNODE_CORE_SIZE - \
|
|
(1 << SPA_BLKPTRSHIFT))
|
|
#define DN_SLOTS_TO_BONUSLEN(slots) DN_BONUS_SIZE((slots) << DNODE_SHIFT)
|
|
#define DN_OLD_MAX_BONUSLEN (DN_BONUS_SIZE(DNODE_MIN_SIZE))
|
|
#define DN_MAX_NBLKPTR ((DNODE_MIN_SIZE - DNODE_CORE_SIZE) >> \
|
|
SPA_BLKPTRSHIFT)
|
|
#define DN_MAX_OBJECT (1ULL << DN_MAX_OBJECT_SHIFT)
|
|
#define DN_ZERO_BONUSLEN (DN_BONUS_SIZE(DNODE_MAX_SIZE) + 1)
|
|
|
|
#define DNODES_PER_BLOCK_SHIFT (DNODE_BLOCK_SHIFT - DNODE_SHIFT)
|
|
#define DNODES_PER_BLOCK (1ULL << DNODES_PER_BLOCK_SHIFT)
|
|
#define DNODES_PER_LEVEL_SHIFT (DN_MAX_INDBLKSHIFT - SPA_BLKPTRSHIFT)
|
|
|
|
/* The +2 here is a cheesy way to round up */
|
|
#define DN_MAX_LEVELS (2 + ((DN_MAX_OFFSET_SHIFT - SPA_MINBLOCKSHIFT) / \
|
|
(DN_MIN_INDBLKSHIFT - SPA_BLKPTRSHIFT)))
|
|
|
|
#define DN_BONUS(dnp) ((void*)((dnp)->dn_bonus + \
|
|
(((dnp)->dn_nblkptr - 1) * sizeof (blkptr_t))))
|
|
|
|
#define DN_USED_BYTES(dnp) (((dnp)->dn_flags & DNODE_FLAG_USED_BYTES) ? \
|
|
(dnp)->dn_used : (dnp)->dn_used << SPA_MINBLOCKSHIFT)
|
|
|
|
#define EPB(blkshift, typeshift) (1 << (blkshift - typeshift))
|
|
|
|
/* Is dn_used in bytes? if not, it's in multiples of SPA_MINBLOCKSIZE */
|
|
#define DNODE_FLAG_USED_BYTES (1<<0)
|
|
#define DNODE_FLAG_USERUSED_ACCOUNTED (1<<1)
|
|
|
|
/* Does dnode have a SA spill blkptr in bonus? */
|
|
#define DNODE_FLAG_SPILL_BLKPTR (1<<2)
|
|
|
|
typedef struct dnode_phys {
|
|
uint8_t dn_type; /* dmu_object_type_t */
|
|
uint8_t dn_indblkshift; /* ln2(indirect block size) */
|
|
uint8_t dn_nlevels; /* 1=dn_blkptr->data blocks */
|
|
uint8_t dn_nblkptr; /* length of dn_blkptr */
|
|
uint8_t dn_bonustype; /* type of data in bonus buffer */
|
|
uint8_t dn_checksum; /* ZIO_CHECKSUM type */
|
|
uint8_t dn_compress; /* ZIO_COMPRESS type */
|
|
uint8_t dn_flags; /* DNODE_FLAG_* */
|
|
uint16_t dn_datablkszsec; /* data block size in 512b sectors */
|
|
uint16_t dn_bonuslen; /* length of dn_bonus */
|
|
uint8_t dn_extra_slots; /* # of subsequent slots consumed */
|
|
uint8_t dn_pad2[3];
|
|
|
|
/* accounting is protected by dn_dirty_mtx */
|
|
uint64_t dn_maxblkid; /* largest allocated block ID */
|
|
uint64_t dn_used; /* bytes (or sectors) of disk space */
|
|
|
|
uint64_t dn_pad3[4];
|
|
|
|
/*
|
|
* The tail region is 448 bytes for a 512 byte dnode, and
|
|
* correspondingly larger for larger dnode sizes. The spill
|
|
* block pointer, when present, is always at the end of the tail
|
|
* region. There are three ways this space may be used, using
|
|
* a 512 byte dnode for this diagram:
|
|
*
|
|
* 0 64 128 192 256 320 384 448 (offset)
|
|
* +---------------+---------------+---------------+-------+
|
|
* | dn_blkptr[0] | dn_blkptr[1] | dn_blkptr[2] | / |
|
|
* +---------------+---------------+---------------+-------+
|
|
* | dn_blkptr[0] | dn_bonus[0..319] |
|
|
* +---------------+-----------------------+---------------+
|
|
* | dn_blkptr[0] | dn_bonus[0..191] | dn_spill |
|
|
* +---------------+-----------------------+---------------+
|
|
*/
|
|
union {
|
|
blkptr_t dn_blkptr[1+DN_OLD_MAX_BONUSLEN/sizeof (blkptr_t)];
|
|
struct {
|
|
blkptr_t __dn_ignore1;
|
|
uint8_t dn_bonus[DN_OLD_MAX_BONUSLEN];
|
|
};
|
|
struct {
|
|
blkptr_t __dn_ignore2;
|
|
uint8_t __dn_ignore3[DN_OLD_MAX_BONUSLEN -
|
|
sizeof (blkptr_t)];
|
|
blkptr_t dn_spill;
|
|
};
|
|
};
|
|
} dnode_phys_t;
|
|
|
|
#define DN_SPILL_BLKPTR(dnp) (blkptr_t *)((char *)(dnp) + \
|
|
(((dnp)->dn_extra_slots + 1) << DNODE_SHIFT) - (1 << SPA_BLKPTRSHIFT))
|
|
|
|
typedef enum dmu_object_byteswap {
|
|
DMU_BSWAP_UINT8,
|
|
DMU_BSWAP_UINT16,
|
|
DMU_BSWAP_UINT32,
|
|
DMU_BSWAP_UINT64,
|
|
DMU_BSWAP_ZAP,
|
|
DMU_BSWAP_DNODE,
|
|
DMU_BSWAP_OBJSET,
|
|
DMU_BSWAP_ZNODE,
|
|
DMU_BSWAP_OLDACL,
|
|
DMU_BSWAP_ACL,
|
|
/*
|
|
* Allocating a new byteswap type number makes the on-disk format
|
|
* incompatible with any other format that uses the same number.
|
|
*
|
|
* Data can usually be structured to work with one of the
|
|
* DMU_BSWAP_UINT* or DMU_BSWAP_ZAP types.
|
|
*/
|
|
DMU_BSWAP_NUMFUNCS
|
|
} dmu_object_byteswap_t;
|
|
|
|
#define DMU_OT_NEWTYPE 0x80
|
|
#define DMU_OT_METADATA 0x40
|
|
#define DMU_OT_BYTESWAP_MASK 0x3f
|
|
|
|
/*
|
|
* Defines a uint8_t object type. Object types specify if the data
|
|
* in the object is metadata (boolean) and how to byteswap the data
|
|
* (dmu_object_byteswap_t).
|
|
*/
|
|
#define DMU_OT(byteswap, metadata) \
|
|
(DMU_OT_NEWTYPE | \
|
|
((metadata) ? DMU_OT_METADATA : 0) | \
|
|
((byteswap) & DMU_OT_BYTESWAP_MASK))
|
|
|
|
typedef enum dmu_object_type {
|
|
DMU_OT_NONE,
|
|
/* general: */
|
|
DMU_OT_OBJECT_DIRECTORY, /* ZAP */
|
|
DMU_OT_OBJECT_ARRAY, /* UINT64 */
|
|
DMU_OT_PACKED_NVLIST, /* UINT8 (XDR by nvlist_pack/unpack) */
|
|
DMU_OT_PACKED_NVLIST_SIZE, /* UINT64 */
|
|
DMU_OT_BPLIST, /* UINT64 */
|
|
DMU_OT_BPLIST_HDR, /* UINT64 */
|
|
/* spa: */
|
|
DMU_OT_SPACE_MAP_HEADER, /* UINT64 */
|
|
DMU_OT_SPACE_MAP, /* UINT64 */
|
|
/* zil: */
|
|
DMU_OT_INTENT_LOG, /* UINT64 */
|
|
/* dmu: */
|
|
DMU_OT_DNODE, /* DNODE */
|
|
DMU_OT_OBJSET, /* OBJSET */
|
|
/* dsl: */
|
|
DMU_OT_DSL_DIR, /* UINT64 */
|
|
DMU_OT_DSL_DIR_CHILD_MAP, /* ZAP */
|
|
DMU_OT_DSL_DS_SNAP_MAP, /* ZAP */
|
|
DMU_OT_DSL_PROPS, /* ZAP */
|
|
DMU_OT_DSL_DATASET, /* UINT64 */
|
|
/* zpl: */
|
|
DMU_OT_ZNODE, /* ZNODE */
|
|
DMU_OT_OLDACL, /* Old ACL */
|
|
DMU_OT_PLAIN_FILE_CONTENTS, /* UINT8 */
|
|
DMU_OT_DIRECTORY_CONTENTS, /* ZAP */
|
|
DMU_OT_MASTER_NODE, /* ZAP */
|
|
DMU_OT_UNLINKED_SET, /* ZAP */
|
|
/* zvol: */
|
|
DMU_OT_ZVOL, /* UINT8 */
|
|
DMU_OT_ZVOL_PROP, /* ZAP */
|
|
/* other; for testing only! */
|
|
DMU_OT_PLAIN_OTHER, /* UINT8 */
|
|
DMU_OT_UINT64_OTHER, /* UINT64 */
|
|
DMU_OT_ZAP_OTHER, /* ZAP */
|
|
/* new object types: */
|
|
DMU_OT_ERROR_LOG, /* ZAP */
|
|
DMU_OT_SPA_HISTORY, /* UINT8 */
|
|
DMU_OT_SPA_HISTORY_OFFSETS, /* spa_his_phys_t */
|
|
DMU_OT_POOL_PROPS, /* ZAP */
|
|
DMU_OT_DSL_PERMS, /* ZAP */
|
|
DMU_OT_ACL, /* ACL */
|
|
DMU_OT_SYSACL, /* SYSACL */
|
|
DMU_OT_FUID, /* FUID table (Packed NVLIST UINT8) */
|
|
DMU_OT_FUID_SIZE, /* FUID table size UINT64 */
|
|
DMU_OT_NEXT_CLONES, /* ZAP */
|
|
DMU_OT_SCAN_QUEUE, /* ZAP */
|
|
DMU_OT_USERGROUP_USED, /* ZAP */
|
|
DMU_OT_USERGROUP_QUOTA, /* ZAP */
|
|
DMU_OT_USERREFS, /* ZAP */
|
|
DMU_OT_DDT_ZAP, /* ZAP */
|
|
DMU_OT_DDT_STATS, /* ZAP */
|
|
DMU_OT_SA, /* System attr */
|
|
DMU_OT_SA_MASTER_NODE, /* ZAP */
|
|
DMU_OT_SA_ATTR_REGISTRATION, /* ZAP */
|
|
DMU_OT_SA_ATTR_LAYOUTS, /* ZAP */
|
|
DMU_OT_SCAN_XLATE, /* ZAP */
|
|
DMU_OT_DEDUP, /* fake dedup BP from ddt_bp_create() */
|
|
DMU_OT_NUMTYPES,
|
|
|
|
/*
|
|
* Names for valid types declared with DMU_OT().
|
|
*/
|
|
DMU_OTN_UINT8_DATA = DMU_OT(DMU_BSWAP_UINT8, B_FALSE),
|
|
DMU_OTN_UINT8_METADATA = DMU_OT(DMU_BSWAP_UINT8, B_TRUE),
|
|
DMU_OTN_UINT16_DATA = DMU_OT(DMU_BSWAP_UINT16, B_FALSE),
|
|
DMU_OTN_UINT16_METADATA = DMU_OT(DMU_BSWAP_UINT16, B_TRUE),
|
|
DMU_OTN_UINT32_DATA = DMU_OT(DMU_BSWAP_UINT32, B_FALSE),
|
|
DMU_OTN_UINT32_METADATA = DMU_OT(DMU_BSWAP_UINT32, B_TRUE),
|
|
DMU_OTN_UINT64_DATA = DMU_OT(DMU_BSWAP_UINT64, B_FALSE),
|
|
DMU_OTN_UINT64_METADATA = DMU_OT(DMU_BSWAP_UINT64, B_TRUE),
|
|
DMU_OTN_ZAP_DATA = DMU_OT(DMU_BSWAP_ZAP, B_FALSE),
|
|
DMU_OTN_ZAP_METADATA = DMU_OT(DMU_BSWAP_ZAP, B_TRUE)
|
|
} dmu_object_type_t;
|
|
|
|
typedef enum dmu_objset_type {
|
|
DMU_OST_NONE,
|
|
DMU_OST_META,
|
|
DMU_OST_ZFS,
|
|
DMU_OST_ZVOL,
|
|
DMU_OST_OTHER, /* For testing only! */
|
|
DMU_OST_ANY, /* Be careful! */
|
|
DMU_OST_NUMTYPES
|
|
} dmu_objset_type_t;
|
|
|
|
/*
|
|
* header for all bonus and spill buffers.
|
|
* The header has a fixed portion with a variable number
|
|
* of "lengths" depending on the number of variable sized
|
|
* attribues which are determined by the "layout number"
|
|
*/
|
|
|
|
#define SA_MAGIC 0x2F505A /* ZFS SA */
|
|
typedef struct sa_hdr_phys {
|
|
uint32_t sa_magic;
|
|
uint16_t sa_layout_info; /* Encoded with hdrsize and layout number */
|
|
uint16_t sa_lengths[1]; /* optional sizes for variable length attrs */
|
|
/* ... Data follows the lengths. */
|
|
} sa_hdr_phys_t;
|
|
|
|
/*
|
|
* sa_hdr_phys -> sa_layout_info
|
|
*
|
|
* 16 10 0
|
|
* +--------+-------+
|
|
* | hdrsz |layout |
|
|
* +--------+-------+
|
|
*
|
|
* Bits 0-10 are the layout number
|
|
* Bits 11-16 are the size of the header.
|
|
* The hdrsize is the number * 8
|
|
*
|
|
* For example.
|
|
* hdrsz of 1 ==> 8 byte header
|
|
* 2 ==> 16 byte header
|
|
*
|
|
*/
|
|
|
|
#define SA_HDR_LAYOUT_NUM(hdr) BF32_GET(hdr->sa_layout_info, 0, 10)
|
|
#define SA_HDR_SIZE(hdr) BF32_GET_SB(hdr->sa_layout_info, 10, 16, 3, 0)
|
|
#define SA_HDR_LAYOUT_INFO_ENCODE(x, num, size) \
|
|
{ \
|
|
BF32_SET_SB(x, 10, 6, 3, 0, size); \
|
|
BF32_SET(x, 0, 10, num); \
|
|
}
|
|
|
|
#define SA_MODE_OFFSET 0
|
|
#define SA_SIZE_OFFSET 8
|
|
#define SA_GEN_OFFSET 16
|
|
#define SA_UID_OFFSET 24
|
|
#define SA_GID_OFFSET 32
|
|
#define SA_PARENT_OFFSET 40
|
|
#define SA_SYMLINK_OFFSET 160
|
|
|
|
#define ZIO_OBJSET_MAC_LEN 32
|
|
|
|
/*
|
|
* Intent log header - this on disk structure holds fields to manage
|
|
* the log. All fields are 64 bit to easily handle cross architectures.
|
|
*/
|
|
typedef struct zil_header {
|
|
uint64_t zh_claim_txg; /* txg in which log blocks were claimed */
|
|
uint64_t zh_replay_seq; /* highest replayed sequence number */
|
|
blkptr_t zh_log; /* log chain */
|
|
uint64_t zh_claim_seq; /* highest claimed sequence number */
|
|
uint64_t zh_pad[5];
|
|
} zil_header_t;
|
|
|
|
#define OBJSET_PHYS_SIZE_V2 2048
|
|
#define OBJSET_PHYS_SIZE_V3 4096
|
|
|
|
typedef struct objset_phys {
|
|
dnode_phys_t os_meta_dnode;
|
|
zil_header_t os_zil_header;
|
|
uint64_t os_type;
|
|
uint64_t os_flags;
|
|
uint8_t os_portable_mac[ZIO_OBJSET_MAC_LEN];
|
|
uint8_t os_local_mac[ZIO_OBJSET_MAC_LEN];
|
|
char os_pad0[OBJSET_PHYS_SIZE_V2 - sizeof (dnode_phys_t)*3 -
|
|
sizeof (zil_header_t) - sizeof (uint64_t)*2 -
|
|
2*ZIO_OBJSET_MAC_LEN];
|
|
dnode_phys_t os_userused_dnode;
|
|
dnode_phys_t os_groupused_dnode;
|
|
dnode_phys_t os_projectused_dnode;
|
|
char os_pad1[OBJSET_PHYS_SIZE_V3 - OBJSET_PHYS_SIZE_V2 -
|
|
sizeof (dnode_phys_t)];
|
|
} objset_phys_t;
|
|
|
|
typedef struct dsl_dir_phys {
|
|
uint64_t dd_creation_time; /* not actually used */
|
|
uint64_t dd_head_dataset_obj;
|
|
uint64_t dd_parent_obj;
|
|
uint64_t dd_clone_parent_obj;
|
|
uint64_t dd_child_dir_zapobj;
|
|
/*
|
|
* how much space our children are accounting for; for leaf
|
|
* datasets, == physical space used by fs + snaps
|
|
*/
|
|
uint64_t dd_used_bytes;
|
|
uint64_t dd_compressed_bytes;
|
|
uint64_t dd_uncompressed_bytes;
|
|
/* Administrative quota setting */
|
|
uint64_t dd_quota;
|
|
/* Administrative reservation setting */
|
|
uint64_t dd_reserved;
|
|
uint64_t dd_props_zapobj;
|
|
uint64_t dd_pad[21]; /* pad out to 256 bytes for good measure */
|
|
} dsl_dir_phys_t;
|
|
|
|
typedef struct dsl_dataset_phys {
|
|
uint64_t ds_dir_obj;
|
|
uint64_t ds_prev_snap_obj;
|
|
uint64_t ds_prev_snap_txg;
|
|
uint64_t ds_next_snap_obj;
|
|
uint64_t ds_snapnames_zapobj; /* zap obj of snaps; ==0 for snaps */
|
|
uint64_t ds_num_children; /* clone/snap children; ==0 for head */
|
|
uint64_t ds_creation_time; /* seconds since 1970 */
|
|
uint64_t ds_creation_txg;
|
|
uint64_t ds_deadlist_obj;
|
|
uint64_t ds_used_bytes;
|
|
uint64_t ds_compressed_bytes;
|
|
uint64_t ds_uncompressed_bytes;
|
|
uint64_t ds_unique_bytes; /* only relevant to snapshots */
|
|
/*
|
|
* The ds_fsid_guid is a 56-bit ID that can change to avoid
|
|
* collisions. The ds_guid is a 64-bit ID that will never
|
|
* change, so there is a small probability that it will collide.
|
|
*/
|
|
uint64_t ds_fsid_guid;
|
|
uint64_t ds_guid;
|
|
uint64_t ds_flags;
|
|
blkptr_t ds_bp;
|
|
uint64_t ds_pad[8]; /* pad out to 320 bytes for good measure */
|
|
} dsl_dataset_phys_t;
|
|
|
|
/*
|
|
* The names of zap entries in the DIRECTORY_OBJECT of the MOS.
|
|
*/
|
|
#define DMU_POOL_DIRECTORY_OBJECT 1
|
|
#define DMU_POOL_CONFIG "config"
|
|
#define DMU_POOL_FEATURES_FOR_READ "features_for_read"
|
|
#define DMU_POOL_ROOT_DATASET "root_dataset"
|
|
#define DMU_POOL_SYNC_BPLIST "sync_bplist"
|
|
#define DMU_POOL_ERRLOG_SCRUB "errlog_scrub"
|
|
#define DMU_POOL_ERRLOG_LAST "errlog_last"
|
|
#define DMU_POOL_SPARES "spares"
|
|
#define DMU_POOL_DEFLATE "deflate"
|
|
#define DMU_POOL_HISTORY "history"
|
|
#define DMU_POOL_PROPS "pool_props"
|
|
#define DMU_POOL_CHECKSUM_SALT "org.illumos:checksum_salt"
|
|
#define DMU_POOL_REMOVING "com.delphix:removing"
|
|
#define DMU_POOL_OBSOLETE_BPOBJ "com.delphix:obsolete_bpobj"
|
|
#define DMU_POOL_CONDENSING_INDIRECT "com.delphix:condensing_indirect"
|
|
|
|
#define ZAP_MAGIC 0x2F52AB2ABULL
|
|
|
|
#define FZAP_BLOCK_SHIFT(zap) ((zap)->zap_block_shift)
|
|
|
|
#define ZAP_MAXCD (uint32_t)(-1)
|
|
#define ZAP_HASHBITS 28
|
|
#define MZAP_ENT_LEN 64
|
|
#define MZAP_NAME_LEN (MZAP_ENT_LEN - 8 - 4 - 2)
|
|
#define MZAP_MAX_BLKSHIFT SPA_MAXBLOCKSHIFT
|
|
#define MZAP_MAX_BLKSZ (1 << MZAP_MAX_BLKSHIFT)
|
|
|
|
typedef struct mzap_ent_phys {
|
|
uint64_t mze_value;
|
|
uint32_t mze_cd;
|
|
uint16_t mze_pad; /* in case we want to chain them someday */
|
|
char mze_name[MZAP_NAME_LEN];
|
|
} mzap_ent_phys_t;
|
|
|
|
typedef struct mzap_phys {
|
|
uint64_t mz_block_type; /* ZBT_MICRO */
|
|
uint64_t mz_salt;
|
|
uint64_t mz_pad[6];
|
|
mzap_ent_phys_t mz_chunk[1];
|
|
/* actually variable size depending on block size */
|
|
} mzap_phys_t;
|
|
|
|
/*
|
|
* The (fat) zap is stored in one object. It is an array of
|
|
* 1<<FZAP_BLOCK_SHIFT byte blocks. The layout looks like one of:
|
|
*
|
|
* ptrtbl fits in first block:
|
|
* [zap_phys_t zap_ptrtbl_shift < 6] [zap_leaf_t] ...
|
|
*
|
|
* ptrtbl too big for first block:
|
|
* [zap_phys_t zap_ptrtbl_shift >= 6] [zap_leaf_t] [ptrtbl] ...
|
|
*
|
|
*/
|
|
|
|
#define ZBT_LEAF ((1ULL << 63) + 0)
|
|
#define ZBT_HEADER ((1ULL << 63) + 1)
|
|
#define ZBT_MICRO ((1ULL << 63) + 3)
|
|
/* any other values are ptrtbl blocks */
|
|
|
|
/*
|
|
* the embedded pointer table takes up half a block:
|
|
* block size / entry size (2^3) / 2
|
|
*/
|
|
#define ZAP_EMBEDDED_PTRTBL_SHIFT(zap) (FZAP_BLOCK_SHIFT(zap) - 3 - 1)
|
|
|
|
/*
|
|
* The embedded pointer table starts half-way through the block. Since
|
|
* the pointer table itself is half the block, it starts at (64-bit)
|
|
* word number (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap)).
|
|
*/
|
|
#define ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) \
|
|
((uint64_t *)(zap)->zap_phys) \
|
|
[(idx) + (1<<ZAP_EMBEDDED_PTRTBL_SHIFT(zap))]
|
|
|
|
/*
|
|
* TAKE NOTE:
|
|
* If zap_phys_t is modified, zap_byteswap() must be modified.
|
|
*/
|
|
typedef struct zap_phys {
|
|
uint64_t zap_block_type; /* ZBT_HEADER */
|
|
uint64_t zap_magic; /* ZAP_MAGIC */
|
|
|
|
struct zap_table_phys {
|
|
uint64_t zt_blk; /* starting block number */
|
|
uint64_t zt_numblks; /* number of blocks */
|
|
uint64_t zt_shift; /* bits to index it */
|
|
uint64_t zt_nextblk; /* next (larger) copy start block */
|
|
uint64_t zt_blks_copied; /* number source blocks copied */
|
|
} zap_ptrtbl;
|
|
|
|
uint64_t zap_freeblk; /* the next free block */
|
|
uint64_t zap_num_leafs; /* number of leafs */
|
|
uint64_t zap_num_entries; /* number of entries */
|
|
uint64_t zap_salt; /* salt to stir into hash function */
|
|
/*
|
|
* This structure is followed by padding, and then the embedded
|
|
* pointer table. The embedded pointer table takes up second
|
|
* half of the block. It is accessed using the
|
|
* ZAP_EMBEDDED_PTRTBL_ENT() macro.
|
|
*/
|
|
} zap_phys_t;
|
|
|
|
typedef struct zap_table_phys zap_table_phys_t;
|
|
|
|
typedef struct fat_zap {
|
|
int zap_block_shift; /* block size shift */
|
|
zap_phys_t *zap_phys;
|
|
} fat_zap_t;
|
|
|
|
#define ZAP_LEAF_MAGIC 0x2AB1EAF
|
|
|
|
/* chunk size = 24 bytes */
|
|
#define ZAP_LEAF_CHUNKSIZE 24
|
|
|
|
/*
|
|
* The amount of space available for chunks is:
|
|
* block size (1<<l->l_bs) - hash entry size (2) * number of hash
|
|
* entries - header space (2*chunksize)
|
|
*/
|
|
#define ZAP_LEAF_NUMCHUNKS(l) \
|
|
(((1<<(l)->l_bs) - 2*ZAP_LEAF_HASH_NUMENTRIES(l)) / \
|
|
ZAP_LEAF_CHUNKSIZE - 2)
|
|
|
|
/*
|
|
* The amount of space within the chunk available for the array is:
|
|
* chunk size - space for type (1) - space for next pointer (2)
|
|
*/
|
|
#define ZAP_LEAF_ARRAY_BYTES (ZAP_LEAF_CHUNKSIZE - 3)
|
|
|
|
#define ZAP_LEAF_ARRAY_NCHUNKS(bytes) \
|
|
(((bytes)+ZAP_LEAF_ARRAY_BYTES-1)/ZAP_LEAF_ARRAY_BYTES)
|
|
|
|
/*
|
|
* Low water mark: when there are only this many chunks free, start
|
|
* growing the ptrtbl. Ideally, this should be larger than a
|
|
* "reasonably-sized" entry. 20 chunks is more than enough for the
|
|
* largest directory entry (MAXNAMELEN (256) byte name, 8-byte value),
|
|
* while still being only around 3% for 16k blocks.
|
|
*/
|
|
#define ZAP_LEAF_LOW_WATER (20)
|
|
|
|
/*
|
|
* The leaf hash table has block size / 2^5 (32) number of entries,
|
|
* which should be more than enough for the maximum number of entries,
|
|
* which is less than block size / CHUNKSIZE (24) / minimum number of
|
|
* chunks per entry (3).
|
|
*/
|
|
#define ZAP_LEAF_HASH_SHIFT(l) ((l)->l_bs - 5)
|
|
#define ZAP_LEAF_HASH_NUMENTRIES(l) (1 << ZAP_LEAF_HASH_SHIFT(l))
|
|
|
|
/*
|
|
* The chunks start immediately after the hash table. The end of the
|
|
* hash table is at l_hash + HASH_NUMENTRIES, which we simply cast to a
|
|
* chunk_t.
|
|
*/
|
|
#define ZAP_LEAF_CHUNK(l, idx) \
|
|
((zap_leaf_chunk_t *) \
|
|
((l)->l_phys->l_hash + ZAP_LEAF_HASH_NUMENTRIES(l)))[idx]
|
|
#define ZAP_LEAF_ENTRY(l, idx) (&ZAP_LEAF_CHUNK(l, idx).l_entry)
|
|
|
|
typedef enum zap_chunk_type {
|
|
ZAP_CHUNK_FREE = 253,
|
|
ZAP_CHUNK_ENTRY = 252,
|
|
ZAP_CHUNK_ARRAY = 251,
|
|
ZAP_CHUNK_TYPE_MAX = 250
|
|
} zap_chunk_type_t;
|
|
|
|
/*
|
|
* TAKE NOTE:
|
|
* If zap_leaf_phys_t is modified, zap_leaf_byteswap() must be modified.
|
|
*/
|
|
typedef struct zap_leaf_phys {
|
|
struct zap_leaf_header {
|
|
uint64_t lh_block_type; /* ZBT_LEAF */
|
|
uint64_t lh_pad1;
|
|
uint64_t lh_prefix; /* hash prefix of this leaf */
|
|
uint32_t lh_magic; /* ZAP_LEAF_MAGIC */
|
|
uint16_t lh_nfree; /* number free chunks */
|
|
uint16_t lh_nentries; /* number of entries */
|
|
uint16_t lh_prefix_len; /* num bits used to id this */
|
|
|
|
/* above is accessable to zap, below is zap_leaf private */
|
|
|
|
uint16_t lh_freelist; /* chunk head of free list */
|
|
uint8_t lh_pad2[12];
|
|
} l_hdr; /* 2 24-byte chunks */
|
|
|
|
/*
|
|
* The header is followed by a hash table with
|
|
* ZAP_LEAF_HASH_NUMENTRIES(zap) entries. The hash table is
|
|
* followed by an array of ZAP_LEAF_NUMCHUNKS(zap)
|
|
* zap_leaf_chunk structures. These structures are accessed
|
|
* with the ZAP_LEAF_CHUNK() macro.
|
|
*/
|
|
|
|
uint16_t l_hash[1];
|
|
} zap_leaf_phys_t;
|
|
|
|
typedef union zap_leaf_chunk {
|
|
struct zap_leaf_entry {
|
|
uint8_t le_type; /* always ZAP_CHUNK_ENTRY */
|
|
uint8_t le_value_intlen; /* size of ints */
|
|
uint16_t le_next; /* next entry in hash chain */
|
|
uint16_t le_name_chunk; /* first chunk of the name */
|
|
uint16_t le_name_numints; /* bytes in name, incl null */
|
|
uint16_t le_value_chunk; /* first chunk of the value */
|
|
uint16_t le_value_numints; /* value length in ints */
|
|
uint32_t le_cd; /* collision differentiator */
|
|
uint64_t le_hash; /* hash value of the name */
|
|
} l_entry;
|
|
struct zap_leaf_array {
|
|
uint8_t la_type; /* always ZAP_CHUNK_ARRAY */
|
|
uint8_t la_array[ZAP_LEAF_ARRAY_BYTES];
|
|
uint16_t la_next; /* next blk or CHAIN_END */
|
|
} l_array;
|
|
struct zap_leaf_free {
|
|
uint8_t lf_type; /* always ZAP_CHUNK_FREE */
|
|
uint8_t lf_pad[ZAP_LEAF_ARRAY_BYTES];
|
|
uint16_t lf_next; /* next in free list, or CHAIN_END */
|
|
} l_free;
|
|
} zap_leaf_chunk_t;
|
|
|
|
typedef struct zap_leaf {
|
|
int l_bs; /* block size shift */
|
|
zap_leaf_phys_t *l_phys;
|
|
} zap_leaf_t;
|
|
|
|
/*
|
|
* Define special zfs pflags
|
|
*/
|
|
#define ZFS_XATTR 0x1 /* is an extended attribute */
|
|
#define ZFS_INHERIT_ACE 0x2 /* ace has inheritable ACEs */
|
|
#define ZFS_ACL_TRIVIAL 0x4 /* files ACL is trivial */
|
|
|
|
#define MASTER_NODE_OBJ 1
|
|
|
|
/*
|
|
* special attributes for master node.
|
|
*/
|
|
|
|
#define ZFS_FSID "FSID"
|
|
#define ZFS_UNLINKED_SET "DELETE_QUEUE"
|
|
#define ZFS_ROOT_OBJ "ROOT"
|
|
#define ZPL_VERSION_OBJ "VERSION"
|
|
#define ZFS_PROP_BLOCKPERPAGE "BLOCKPERPAGE"
|
|
#define ZFS_PROP_NOGROWBLOCKS "NOGROWBLOCKS"
|
|
|
|
#define ZFS_FLAG_BLOCKPERPAGE 0x1
|
|
#define ZFS_FLAG_NOGROWBLOCKS 0x2
|
|
|
|
/*
|
|
* ZPL version - rev'd whenever an incompatible on-disk format change
|
|
* occurs. Independent of SPA/DMU/ZAP versioning.
|
|
*/
|
|
|
|
#define ZPL_VERSION 1ULL
|
|
|
|
/*
|
|
* The directory entry has the type (currently unused on Solaris) in the
|
|
* top 4 bits, and the object number in the low 48 bits. The "middle"
|
|
* 12 bits are unused.
|
|
*/
|
|
#define ZFS_DIRENT_TYPE(de) BF64_GET(de, 60, 4)
|
|
#define ZFS_DIRENT_OBJ(de) BF64_GET(de, 0, 48)
|
|
#define ZFS_DIRENT_MAKE(type, obj) (((uint64_t)type << 60) | obj)
|
|
|
|
typedef struct ace {
|
|
uid_t a_who; /* uid or gid */
|
|
uint32_t a_access_mask; /* read,write,... */
|
|
uint16_t a_flags; /* see below */
|
|
uint16_t a_type; /* allow or deny */
|
|
} ace_t;
|
|
|
|
#define ACE_SLOT_CNT 6
|
|
|
|
typedef struct zfs_znode_acl {
|
|
uint64_t z_acl_extern_obj; /* ext acl pieces */
|
|
uint32_t z_acl_count; /* Number of ACEs */
|
|
uint16_t z_acl_version; /* acl version */
|
|
uint16_t z_acl_pad; /* pad */
|
|
ace_t z_ace_data[ACE_SLOT_CNT]; /* 6 standard ACEs */
|
|
} zfs_znode_acl_t;
|
|
|
|
/*
|
|
* This is the persistent portion of the znode. It is stored
|
|
* in the "bonus buffer" of the file. Short symbolic links
|
|
* are also stored in the bonus buffer.
|
|
*/
|
|
typedef struct znode_phys {
|
|
uint64_t zp_atime[2]; /* 0 - last file access time */
|
|
uint64_t zp_mtime[2]; /* 16 - last file modification time */
|
|
uint64_t zp_ctime[2]; /* 32 - last file change time */
|
|
uint64_t zp_crtime[2]; /* 48 - creation time */
|
|
uint64_t zp_gen; /* 64 - generation (txg of creation) */
|
|
uint64_t zp_mode; /* 72 - file mode bits */
|
|
uint64_t zp_size; /* 80 - size of file */
|
|
uint64_t zp_parent; /* 88 - directory parent (`..') */
|
|
uint64_t zp_links; /* 96 - number of links to file */
|
|
uint64_t zp_xattr; /* 104 - DMU object for xattrs */
|
|
uint64_t zp_rdev; /* 112 - dev_t for VBLK & VCHR files */
|
|
uint64_t zp_flags; /* 120 - persistent flags */
|
|
uint64_t zp_uid; /* 128 - file owner */
|
|
uint64_t zp_gid; /* 136 - owning group */
|
|
uint64_t zp_pad[4]; /* 144 - future */
|
|
zfs_znode_acl_t zp_acl; /* 176 - 263 ACL */
|
|
/*
|
|
* Data may pad out any remaining bytes in the znode buffer, eg:
|
|
*
|
|
* |<---------------------- dnode_phys (512) ------------------------>|
|
|
* |<-- dnode (192) --->|<----------- "bonus" buffer (320) ---------->|
|
|
* |<---- znode (264) ---->|<---- data (56) ---->|
|
|
*
|
|
* At present, we only use this space to store symbolic links.
|
|
*/
|
|
} znode_phys_t;
|
|
|
|
/*
|
|
* In-core vdev representation.
|
|
*/
|
|
struct vdev;
|
|
struct spa;
|
|
typedef int vdev_phys_read_t(struct vdev *vdev, void *priv,
|
|
off_t offset, void *buf, size_t bytes);
|
|
typedef int vdev_read_t(struct vdev *vdev, const blkptr_t *bp,
|
|
void *buf, off_t offset, size_t bytes);
|
|
|
|
typedef STAILQ_HEAD(vdev_list, vdev) vdev_list_t;
|
|
|
|
typedef struct vdev_indirect_mapping_entry_phys {
|
|
/*
|
|
* Decode with DVA_MAPPING_* macros.
|
|
* Contains:
|
|
* the source offset (low 63 bits)
|
|
* the one-bit "mark", used for garbage collection (by zdb)
|
|
*/
|
|
uint64_t vimep_src;
|
|
|
|
/*
|
|
* Note: the DVA's asize is 24 bits, and can thus store ranges
|
|
* up to 8GB.
|
|
*/
|
|
dva_t vimep_dst;
|
|
} vdev_indirect_mapping_entry_phys_t;
|
|
|
|
#define DVA_MAPPING_GET_SRC_OFFSET(vimep) \
|
|
BF64_GET_SB((vimep)->vimep_src, 0, 63, SPA_MINBLOCKSHIFT, 0)
|
|
#define DVA_MAPPING_SET_SRC_OFFSET(vimep, x) \
|
|
BF64_SET_SB((vimep)->vimep_src, 0, 63, SPA_MINBLOCKSHIFT, 0, x)
|
|
|
|
typedef struct vdev_indirect_mapping_entry {
|
|
vdev_indirect_mapping_entry_phys_t vime_mapping;
|
|
uint32_t vime_obsolete_count;
|
|
list_node_t vime_node;
|
|
} vdev_indirect_mapping_entry_t;
|
|
|
|
/*
|
|
* This is stored in the bonus buffer of the mapping object, see comment of
|
|
* vdev_indirect_config for more details.
|
|
*/
|
|
typedef struct vdev_indirect_mapping_phys {
|
|
uint64_t vimp_max_offset;
|
|
uint64_t vimp_bytes_mapped;
|
|
uint64_t vimp_num_entries; /* number of v_i_m_entry_phys_t's */
|
|
|
|
/*
|
|
* For each entry in the mapping object, this object contains an
|
|
* entry representing the number of bytes of that mapping entry
|
|
* that were no longer in use by the pool at the time this indirect
|
|
* vdev was last condensed.
|
|
*/
|
|
uint64_t vimp_counts_object;
|
|
} vdev_indirect_mapping_phys_t;
|
|
|
|
#define VDEV_INDIRECT_MAPPING_SIZE_V0 (3 * sizeof (uint64_t))
|
|
|
|
typedef struct vdev_indirect_mapping {
|
|
uint64_t vim_object;
|
|
boolean_t vim_havecounts;
|
|
|
|
/* vim_entries segment offset currently in memory. */
|
|
uint64_t vim_entry_offset;
|
|
/* vim_entries segment size. */
|
|
size_t vim_num_entries;
|
|
|
|
/* Needed by dnode_read() */
|
|
const void *vim_spa;
|
|
dnode_phys_t *vim_dn;
|
|
|
|
/*
|
|
* An ordered array of mapping entries, sorted by source offset.
|
|
* Note that vim_entries is needed during a removal (and contains
|
|
* mappings that have been synced to disk so far) to handle frees
|
|
* from the removing device.
|
|
*/
|
|
vdev_indirect_mapping_entry_phys_t *vim_entries;
|
|
objset_phys_t *vim_objset;
|
|
vdev_indirect_mapping_phys_t *vim_phys;
|
|
} vdev_indirect_mapping_t;
|
|
|
|
/*
|
|
* On-disk indirect vdev state.
|
|
*
|
|
* An indirect vdev is described exclusively in the MOS config of a pool.
|
|
* The config for an indirect vdev includes several fields, which are
|
|
* accessed in memory by a vdev_indirect_config_t.
|
|
*/
|
|
typedef struct vdev_indirect_config {
|
|
/*
|
|
* Object (in MOS) which contains the indirect mapping. This object
|
|
* contains an array of vdev_indirect_mapping_entry_phys_t ordered by
|
|
* vimep_src. The bonus buffer for this object is a
|
|
* vdev_indirect_mapping_phys_t. This object is allocated when a vdev
|
|
* removal is initiated.
|
|
*
|
|
* Note that this object can be empty if none of the data on the vdev
|
|
* has been copied yet.
|
|
*/
|
|
uint64_t vic_mapping_object;
|
|
|
|
/*
|
|
* Object (in MOS) which contains the birth times for the mapping
|
|
* entries. This object contains an array of
|
|
* vdev_indirect_birth_entry_phys_t sorted by vibe_offset. The bonus
|
|
* buffer for this object is a vdev_indirect_birth_phys_t. This object
|
|
* is allocated when a vdev removal is initiated.
|
|
*
|
|
* Note that this object can be empty if none of the vdev has yet been
|
|
* copied.
|
|
*/
|
|
uint64_t vic_births_object;
|
|
|
|
/*
|
|
* This is the vdev ID which was removed previous to this vdev, or
|
|
* UINT64_MAX if there are no previously removed vdevs.
|
|
*/
|
|
uint64_t vic_prev_indirect_vdev;
|
|
} vdev_indirect_config_t;
|
|
|
|
typedef struct vdev {
|
|
STAILQ_ENTRY(vdev) v_childlink; /* link in parent's child list */
|
|
STAILQ_ENTRY(vdev) v_alllink; /* link in global vdev list */
|
|
vdev_list_t v_children; /* children of this vdev */
|
|
const char *v_name; /* vdev name */
|
|
uint64_t v_guid; /* vdev guid */
|
|
uint64_t v_id; /* index in parent */
|
|
uint64_t v_psize; /* physical device capacity */
|
|
int v_ashift; /* offset to block shift */
|
|
int v_nparity; /* # parity for raidz */
|
|
struct vdev *v_top; /* parent vdev */
|
|
int v_nchildren; /* # children */
|
|
vdev_state_t v_state; /* current state */
|
|
vdev_phys_read_t *v_phys_read; /* read from raw leaf vdev */
|
|
vdev_read_t *v_read; /* read from vdev */
|
|
void *v_read_priv; /* private data for read function */
|
|
boolean_t v_islog;
|
|
struct spa *spa; /* link to spa */
|
|
/*
|
|
* Values stored in the config for an indirect or removing vdev.
|
|
*/
|
|
vdev_indirect_config_t vdev_indirect_config;
|
|
vdev_indirect_mapping_t *v_mapping;
|
|
} vdev_t;
|
|
|
|
/*
|
|
* In-core pool representation.
|
|
*/
|
|
typedef STAILQ_HEAD(spa_list, spa) spa_list_t;
|
|
|
|
typedef struct spa {
|
|
STAILQ_ENTRY(spa) spa_link; /* link in global pool list */
|
|
char *spa_name; /* pool name */
|
|
uint64_t spa_guid; /* pool guid */
|
|
uint64_t spa_txg; /* most recent transaction */
|
|
struct uberblock spa_uberblock; /* best uberblock so far */
|
|
vdev_list_t spa_vdevs; /* list of all toplevel vdevs */
|
|
objset_phys_t spa_mos; /* MOS for this pool */
|
|
zio_cksum_salt_t spa_cksum_salt; /* secret salt for cksum */
|
|
void *spa_cksum_tmpls[ZIO_CHECKSUM_FUNCTIONS];
|
|
int spa_inited; /* initialized */
|
|
boolean_t spa_with_log; /* this pool has log */
|
|
} spa_t;
|
|
|
|
/* IO related arguments. */
|
|
typedef struct zio {
|
|
spa_t *io_spa;
|
|
blkptr_t *io_bp;
|
|
void *io_data;
|
|
uint64_t io_size;
|
|
uint64_t io_offset;
|
|
|
|
/* Stuff for the vdev stack */
|
|
vdev_t *io_vd;
|
|
void *io_vsd;
|
|
|
|
int io_error;
|
|
} zio_t;
|
|
|
|
static void decode_embedded_bp_compressed(const blkptr_t *, void *);
|