3b7f360c96
Authored by: George Wilson <george.wilson@delphix.com> Approved by: Dan McDonald <danmcd@omniti.com> Reviewed by: Brad Lewis <brad.lewis@delphix.com> Reviewed by: Matt Ahrens <mahrens@delphix.com> Reviewed by: Dan Kimmel <dan.kimmel@delphix.com> Reviewed by: Saso Kiselkov <saso.kiselkov@nexenta.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: George Melikov <mail@gmelikov.ru> Ported-by: Giuseppe Di Natale <dinatale2@llnl.gov> We don't want to dirty any data when we're in the final txgs of the pool export logic. This change introduces checks to make sure that no data is dirtied after a certain point. It also addresses the culprit of this specific bug – the space map cannot be upgraded when we're in final stages of pool export. If we encounter a space map that wants to be upgraded in this phase, then we simply ignore the request as it will get retried the next time we set the fragmentation metric on that metaslab. OpenZFS-issue: https://www.illumos.org/issues/8023 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/2ef00f5 Closes #5991
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) \
|
|
BF64_SET((bp)->blk_prop, 32, SPA_COMPRESSBITS, x)
|
|
|
|
#define BP_IS_EMBEDDED(bp) BF64_GET((bp)->blk_prop, 39, 1)
|
|
#define BP_SET_EMBEDDED(bp, x) BF64_SET((bp)->blk_prop, 39, 1, x)
|
|
|
|
#define BP_GET_CHECKSUM(bp) \
|
|
(BP_IS_EMBEDDED(bp) ? ZIO_CHECKSUM_OFF : \
|
|
BF64_GET((bp)->blk_prop, 40, 8))
|
|
#define BP_SET_CHECKSUM(bp, x) do { \
|
|
ASSERT(!BP_IS_EMBEDDED(bp)); \
|
|
BF64_SET((bp)->blk_prop, 40, 8, x); \
|
|
_NOTE(CONSTCOND) } while (0)
|
|
|
|
#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 */
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typedef enum spa_log_state {
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SPA_LOG_UNKNOWN = 0, /* unknown log state */
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SPA_LOG_MISSING, /* missing log(s) */
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SPA_LOG_CLEAR, /* clear the log(s) */
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SPA_LOG_GOOD, /* log(s) are good */
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} spa_log_state_t;
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extern spa_log_state_t spa_get_log_state(spa_t *spa);
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extern void spa_set_log_state(spa_t *spa, spa_log_state_t state);
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extern int spa_offline_log(spa_t *spa);
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/* Log claim callback */
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extern void spa_claim_notify(zio_t *zio);
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extern void spa_deadman(void *);
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/* Accessor functions */
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extern boolean_t spa_shutting_down(spa_t *spa);
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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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|
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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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|
|
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/* Initialization and termination */
|
|
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 */
|
|
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 */
|
|
extern void spa_event_notify(spa_t *spa, vdev_t *vdev, const char *name);
|
|
|
|
#ifdef ZFS_DEBUG
|
|
#define dprintf_bp(bp, fmt, ...) do { \
|
|
if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
|
|
char *__blkbuf = kmem_alloc(BP_SPRINTF_LEN, KM_SLEEP); \
|
|
snprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \
|
|
dprintf(fmt " %s\n", __VA_ARGS__, __blkbuf); \
|
|
kmem_free(__blkbuf, BP_SPRINTF_LEN); \
|
|
} \
|
|
_NOTE(CONSTCOND) } while (0)
|
|
#else
|
|
#define dprintf_bp(bp, fmt, ...)
|
|
#endif
|
|
|
|
extern boolean_t spa_debug_enabled(spa_t *spa);
|
|
#define spa_dbgmsg(spa, ...) \
|
|
{ \
|
|
if (spa_debug_enabled(spa)) \
|
|
zfs_dbgmsg(__VA_ARGS__); \
|
|
}
|
|
|
|
extern int spa_mode_global; /* mode, e.g. FREAD | FWRITE */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _SYS_SPA_H */
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