552 lines
16 KiB
C
552 lines
16 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) 2012, 2017 by Delphix. All rights reserved.
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* Copyright 2016 RackTop Systems.
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* Copyright (c) 2017, Intel Corporation.
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*/
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#ifndef _SYS_ZFS_IOCTL_H
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#define _SYS_ZFS_IOCTL_H
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#include <sys/cred.h>
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#include <sys/dmu.h>
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#include <sys/zio.h>
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#include <sys/dsl_deleg.h>
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#include <sys/spa.h>
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#include <sys/zfs_stat.h>
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#ifdef _KERNEL
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#include <sys/nvpair.h>
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#endif /* _KERNEL */
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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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* The structures in this file are passed between userland and the
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* kernel. Userland may be running a 32-bit process, while the kernel
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* is 64-bit. Therefore, these structures need to compile the same in
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* 32-bit and 64-bit. This means not using type "long", and adding
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* explicit padding so that the 32-bit structure will not be packed more
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* tightly than the 64-bit structure (which requires 64-bit alignment).
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*/
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/*
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* Property values for snapdir
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*/
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#define ZFS_SNAPDIR_HIDDEN 0
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#define ZFS_SNAPDIR_VISIBLE 1
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/*
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* Property values for snapdev
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*/
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#define ZFS_SNAPDEV_HIDDEN 0
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#define ZFS_SNAPDEV_VISIBLE 1
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/*
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* Property values for acltype
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*/
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#define ZFS_ACLTYPE_OFF 0
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#define ZFS_ACLTYPE_POSIXACL 1
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/*
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* Field manipulation macros for the drr_versioninfo field of the
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* send stream header.
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*/
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/*
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* Header types for zfs send streams.
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*/
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typedef enum drr_headertype {
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DMU_SUBSTREAM = 0x1,
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DMU_COMPOUNDSTREAM = 0x2
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} drr_headertype_t;
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#define DMU_GET_STREAM_HDRTYPE(vi) BF64_GET((vi), 0, 2)
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#define DMU_SET_STREAM_HDRTYPE(vi, x) BF64_SET((vi), 0, 2, x)
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#define DMU_GET_FEATUREFLAGS(vi) BF64_GET((vi), 2, 30)
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#define DMU_SET_FEATUREFLAGS(vi, x) BF64_SET((vi), 2, 30, x)
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/*
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* Feature flags for zfs send streams (flags in drr_versioninfo)
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*/
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#define DMU_BACKUP_FEATURE_DEDUP (1 << 0)
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#define DMU_BACKUP_FEATURE_DEDUPPROPS (1 << 1)
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#define DMU_BACKUP_FEATURE_SA_SPILL (1 << 2)
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/* flags #3 - #15 are reserved for incompatible closed-source implementations */
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#define DMU_BACKUP_FEATURE_EMBED_DATA (1 << 16)
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#define DMU_BACKUP_FEATURE_LZ4 (1 << 17)
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/* flag #18 is reserved for a Delphix feature */
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#define DMU_BACKUP_FEATURE_LARGE_BLOCKS (1 << 19)
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#define DMU_BACKUP_FEATURE_RESUMING (1 << 20)
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/* flag #21 is reserved for the redacted send/receive feature */
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#define DMU_BACKUP_FEATURE_COMPRESSED (1 << 22)
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#define DMU_BACKUP_FEATURE_LARGE_DNODE (1 << 23)
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#define DMU_BACKUP_FEATURE_RAW (1 << 24)
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/* flag #25 is reserved for the ZSTD compression feature */
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#define DMU_BACKUP_FEATURE_HOLDS (1 << 26)
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/*
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* Mask of all supported backup features
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*/
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#define DMU_BACKUP_FEATURE_MASK (DMU_BACKUP_FEATURE_DEDUP | \
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DMU_BACKUP_FEATURE_DEDUPPROPS | DMU_BACKUP_FEATURE_SA_SPILL | \
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DMU_BACKUP_FEATURE_EMBED_DATA | DMU_BACKUP_FEATURE_LZ4 | \
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DMU_BACKUP_FEATURE_RESUMING | DMU_BACKUP_FEATURE_LARGE_BLOCKS | \
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DMU_BACKUP_FEATURE_COMPRESSED | DMU_BACKUP_FEATURE_LARGE_DNODE | \
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DMU_BACKUP_FEATURE_RAW | DMU_BACKUP_FEATURE_HOLDS)
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/* Are all features in the given flag word currently supported? */
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#define DMU_STREAM_SUPPORTED(x) (!((x) & ~DMU_BACKUP_FEATURE_MASK))
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typedef enum dmu_send_resume_token_version {
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ZFS_SEND_RESUME_TOKEN_VERSION = 1
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} dmu_send_resume_token_version_t;
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/*
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* The drr_versioninfo field of the dmu_replay_record has the
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* following layout:
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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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* | reserved | feature-flags |C|S|
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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*
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* The low order two bits indicate the header type: SUBSTREAM (0x1)
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* or COMPOUNDSTREAM (0x2). Using two bits for this is historical:
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* this field used to be a version number, where the two version types
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* were 1 and 2. Using two bits for this allows earlier versions of
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* the code to be able to recognize send streams that don't use any
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* of the features indicated by feature flags.
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*/
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#define DMU_BACKUP_MAGIC 0x2F5bacbacULL
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/*
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* Send stream flags. Bits 24-31 are reserved for vendor-specific
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* implementations and should not be used.
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*/
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#define DRR_FLAG_CLONE (1<<0)
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#define DRR_FLAG_CI_DATA (1<<1)
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/*
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* This send stream, if it is a full send, includes the FREE and FREEOBJECT
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* records that are created by the sending process. This means that the send
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* stream can be received as a clone, even though it is not an incremental.
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* This is not implemented as a feature flag, because the receiving side does
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* not need to have implemented it to receive this stream; it is fully backwards
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* compatible. We need a flag, though, because full send streams without it
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* cannot necessarily be received as a clone correctly.
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*/
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#define DRR_FLAG_FREERECORDS (1<<2)
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/*
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* When DRR_FLAG_SPILL_BLOCK is set it indicates the DRR_OBJECT_SPILL
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* and DRR_SPILL_UNMODIFIED flags are meaningful in the send stream.
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*
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* When DRR_FLAG_SPILL_BLOCK is set, DRR_OBJECT records will have
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* DRR_OBJECT_SPILL set if and only if they should have a spill block
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* (either an existing one, or a new one in the send stream). When clear
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* the object does not have a spill block and any existing spill block
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* should be freed.
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*
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* Similarly, when DRR_FLAG_SPILL_BLOCK is set, DRR_SPILL records will
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* have DRR_SPILL_UNMODIFIED set if and only if they were included for
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* backward compatibility purposes, and can be safely ignored by new versions
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* of zfs receive. Previous versions of ZFS which do not understand the
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* DRR_FLAG_SPILL_BLOCK will process this record and recreate any missing
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* spill blocks.
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*/
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#define DRR_FLAG_SPILL_BLOCK (1<<3)
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/*
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* flags in the drr_flags field in the DRR_WRITE, DRR_SPILL, DRR_OBJECT,
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* DRR_WRITE_BYREF, and DRR_OBJECT_RANGE blocks
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*/
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#define DRR_CHECKSUM_DEDUP (1<<0) /* not used for SPILL records */
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#define DRR_RAW_BYTESWAP (1<<1)
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#define DRR_OBJECT_SPILL (1<<2) /* OBJECT record has a spill block */
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#define DRR_SPILL_UNMODIFIED (1<<2) /* SPILL record for unmodified block */
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#define DRR_IS_DEDUP_CAPABLE(flags) ((flags) & DRR_CHECKSUM_DEDUP)
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#define DRR_IS_RAW_BYTESWAPPED(flags) ((flags) & DRR_RAW_BYTESWAP)
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#define DRR_OBJECT_HAS_SPILL(flags) ((flags) & DRR_OBJECT_SPILL)
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#define DRR_SPILL_IS_UNMODIFIED(flags) ((flags) & DRR_SPILL_UNMODIFIED)
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/* deal with compressed drr_write replay records */
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#define DRR_WRITE_COMPRESSED(drrw) ((drrw)->drr_compressiontype != 0)
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#define DRR_WRITE_PAYLOAD_SIZE(drrw) \
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(DRR_WRITE_COMPRESSED(drrw) ? (drrw)->drr_compressed_size : \
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(drrw)->drr_logical_size)
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#define DRR_SPILL_PAYLOAD_SIZE(drrs) \
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((drrs)->drr_compressed_size ? \
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(drrs)->drr_compressed_size : (drrs)->drr_length)
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#define DRR_OBJECT_PAYLOAD_SIZE(drro) \
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((drro)->drr_raw_bonuslen != 0 ? \
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(drro)->drr_raw_bonuslen : P2ROUNDUP((drro)->drr_bonuslen, 8))
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/*
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* zfs ioctl command structure
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*/
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typedef struct dmu_replay_record {
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enum {
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DRR_BEGIN, DRR_OBJECT, DRR_FREEOBJECTS,
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DRR_WRITE, DRR_FREE, DRR_END, DRR_WRITE_BYREF,
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DRR_SPILL, DRR_WRITE_EMBEDDED, DRR_OBJECT_RANGE,
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DRR_NUMTYPES
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} drr_type;
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uint32_t drr_payloadlen;
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union {
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struct drr_begin {
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uint64_t drr_magic;
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uint64_t drr_versioninfo; /* was drr_version */
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uint64_t drr_creation_time;
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dmu_objset_type_t drr_type;
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uint32_t drr_flags;
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uint64_t drr_toguid;
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uint64_t drr_fromguid;
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char drr_toname[MAXNAMELEN];
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} drr_begin;
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struct drr_end {
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zio_cksum_t drr_checksum;
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uint64_t drr_toguid;
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} drr_end;
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struct drr_object {
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uint64_t drr_object;
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dmu_object_type_t drr_type;
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dmu_object_type_t drr_bonustype;
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uint32_t drr_blksz;
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uint32_t drr_bonuslen;
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uint8_t drr_checksumtype;
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uint8_t drr_compress;
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uint8_t drr_dn_slots;
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uint8_t drr_flags;
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uint32_t drr_raw_bonuslen;
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uint64_t drr_toguid;
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/* only (possibly) nonzero for raw streams */
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uint8_t drr_indblkshift;
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uint8_t drr_nlevels;
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uint8_t drr_nblkptr;
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uint8_t drr_pad[5];
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uint64_t drr_maxblkid;
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/* bonus content follows */
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} drr_object;
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struct drr_freeobjects {
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uint64_t drr_firstobj;
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uint64_t drr_numobjs;
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uint64_t drr_toguid;
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} drr_freeobjects;
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struct drr_write {
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uint64_t drr_object;
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dmu_object_type_t drr_type;
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uint32_t drr_pad;
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uint64_t drr_offset;
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uint64_t drr_logical_size;
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uint64_t drr_toguid;
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uint8_t drr_checksumtype;
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uint8_t drr_flags;
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uint8_t drr_compressiontype;
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uint8_t drr_pad2[5];
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/* deduplication key */
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ddt_key_t drr_key;
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/* only nonzero if drr_compressiontype is not 0 */
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uint64_t drr_compressed_size;
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/* only nonzero for raw streams */
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uint8_t drr_salt[ZIO_DATA_SALT_LEN];
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uint8_t drr_iv[ZIO_DATA_IV_LEN];
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uint8_t drr_mac[ZIO_DATA_MAC_LEN];
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/* content follows */
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} drr_write;
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struct drr_free {
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uint64_t drr_object;
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uint64_t drr_offset;
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uint64_t drr_length;
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uint64_t drr_toguid;
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} drr_free;
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struct drr_write_byref {
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/* where to put the data */
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uint64_t drr_object;
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uint64_t drr_offset;
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uint64_t drr_length;
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uint64_t drr_toguid;
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/* where to find the prior copy of the data */
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uint64_t drr_refguid;
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uint64_t drr_refobject;
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uint64_t drr_refoffset;
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/* properties of the data */
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uint8_t drr_checksumtype;
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uint8_t drr_flags;
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uint8_t drr_pad2[6];
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ddt_key_t drr_key; /* deduplication key */
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} drr_write_byref;
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struct drr_spill {
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uint64_t drr_object;
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uint64_t drr_length;
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uint64_t drr_toguid;
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uint8_t drr_flags;
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uint8_t drr_compressiontype;
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uint8_t drr_pad[6];
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/* only nonzero for raw streams */
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uint64_t drr_compressed_size;
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uint8_t drr_salt[ZIO_DATA_SALT_LEN];
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uint8_t drr_iv[ZIO_DATA_IV_LEN];
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uint8_t drr_mac[ZIO_DATA_MAC_LEN];
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dmu_object_type_t drr_type;
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/* spill data follows */
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} drr_spill;
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struct drr_write_embedded {
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uint64_t drr_object;
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uint64_t drr_offset;
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/* logical length, should equal blocksize */
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uint64_t drr_length;
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uint64_t drr_toguid;
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uint8_t drr_compression;
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uint8_t drr_etype;
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uint8_t drr_pad[6];
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uint32_t drr_lsize; /* uncompressed size of payload */
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uint32_t drr_psize; /* compr. (real) size of payload */
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/* (possibly compressed) content follows */
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} drr_write_embedded;
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struct drr_object_range {
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uint64_t drr_firstobj;
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uint64_t drr_numslots;
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uint64_t drr_toguid;
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uint8_t drr_salt[ZIO_DATA_SALT_LEN];
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uint8_t drr_iv[ZIO_DATA_IV_LEN];
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uint8_t drr_mac[ZIO_DATA_MAC_LEN];
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uint8_t drr_flags;
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uint8_t drr_pad[3];
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} drr_object_range;
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/*
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* Nore: drr_checksum is overlaid with all record types
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* except DRR_BEGIN. Therefore its (non-pad) members
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* must not overlap with members from the other structs.
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* We accomplish this by putting its members at the very
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* end of the struct.
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*/
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struct drr_checksum {
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uint64_t drr_pad[34];
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/*
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* fletcher-4 checksum of everything preceding the
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* checksum.
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*/
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zio_cksum_t drr_checksum;
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} drr_checksum;
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} drr_u;
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} dmu_replay_record_t;
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/* diff record range types */
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typedef enum diff_type {
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DDR_NONE = 0x1,
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DDR_INUSE = 0x2,
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DDR_FREE = 0x4
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} diff_type_t;
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/*
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* The diff reports back ranges of free or in-use objects.
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*/
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typedef struct dmu_diff_record {
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uint64_t ddr_type;
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uint64_t ddr_first;
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uint64_t ddr_last;
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} dmu_diff_record_t;
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typedef struct zinject_record {
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uint64_t zi_objset;
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uint64_t zi_object;
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uint64_t zi_start;
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uint64_t zi_end;
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uint64_t zi_guid;
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uint32_t zi_level;
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uint32_t zi_error;
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uint64_t zi_type;
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uint32_t zi_freq;
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uint32_t zi_failfast;
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char zi_func[MAXNAMELEN];
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uint32_t zi_iotype;
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int32_t zi_duration;
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uint64_t zi_timer;
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uint64_t zi_nlanes;
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uint32_t zi_cmd;
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uint32_t zi_dvas;
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} zinject_record_t;
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#define ZINJECT_NULL 0x1
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#define ZINJECT_FLUSH_ARC 0x2
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#define ZINJECT_UNLOAD_SPA 0x4
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#define ZINJECT_CALC_RANGE 0x8
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#define ZEVENT_NONE 0x0
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#define ZEVENT_NONBLOCK 0x1
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#define ZEVENT_SIZE 1024
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#define ZEVENT_SEEK_START 0
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#define ZEVENT_SEEK_END UINT64_MAX
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/* scaled frequency ranges */
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#define ZI_PERCENTAGE_MIN 4294UL
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#define ZI_PERCENTAGE_MAX UINT32_MAX
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#define ZI_NO_DVA (-1)
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typedef enum zinject_type {
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ZINJECT_UNINITIALIZED,
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ZINJECT_DATA_FAULT,
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ZINJECT_DEVICE_FAULT,
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ZINJECT_LABEL_FAULT,
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ZINJECT_IGNORED_WRITES,
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ZINJECT_PANIC,
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ZINJECT_DELAY_IO,
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ZINJECT_DECRYPT_FAULT,
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} zinject_type_t;
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typedef struct zfs_share {
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uint64_t z_exportdata;
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uint64_t z_sharedata;
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uint64_t z_sharetype; /* 0 = share, 1 = unshare */
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uint64_t z_sharemax; /* max length of share string */
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} zfs_share_t;
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/*
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* ZFS file systems may behave the usual, POSIX-compliant way, where
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* name lookups are case-sensitive. They may also be set up so that
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* all the name lookups are case-insensitive, or so that only some
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* lookups, the ones that set an FIGNORECASE flag, are case-insensitive.
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*/
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typedef enum zfs_case {
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ZFS_CASE_SENSITIVE,
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ZFS_CASE_INSENSITIVE,
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ZFS_CASE_MIXED
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} zfs_case_t;
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/*
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* Note: this struct must have the same layout in 32-bit and 64-bit, so
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* that 32-bit processes (like /sbin/zfs) can pass it to the 64-bit
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* kernel. Therefore, we add padding to it so that no "hidden" padding
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* is automatically added on 64-bit (but not on 32-bit).
|
|
*/
|
|
typedef struct zfs_cmd {
|
|
char zc_name[MAXPATHLEN]; /* name of pool or dataset */
|
|
uint64_t zc_nvlist_src; /* really (char *) */
|
|
uint64_t zc_nvlist_src_size;
|
|
uint64_t zc_nvlist_dst; /* really (char *) */
|
|
uint64_t zc_nvlist_dst_size;
|
|
boolean_t zc_nvlist_dst_filled; /* put an nvlist in dst? */
|
|
int zc_pad2;
|
|
|
|
/*
|
|
* The following members are for legacy ioctls which haven't been
|
|
* converted to the new method.
|
|
*/
|
|
uint64_t zc_history; /* really (char *) */
|
|
char zc_value[MAXPATHLEN * 2];
|
|
char zc_string[MAXNAMELEN];
|
|
uint64_t zc_guid;
|
|
uint64_t zc_nvlist_conf; /* really (char *) */
|
|
uint64_t zc_nvlist_conf_size;
|
|
uint64_t zc_cookie;
|
|
uint64_t zc_objset_type;
|
|
uint64_t zc_perm_action;
|
|
uint64_t zc_history_len;
|
|
uint64_t zc_history_offset;
|
|
uint64_t zc_obj;
|
|
uint64_t zc_iflags; /* internal to zfs(7fs) */
|
|
zfs_share_t zc_share;
|
|
dmu_objset_stats_t zc_objset_stats;
|
|
struct drr_begin zc_begin_record;
|
|
zinject_record_t zc_inject_record;
|
|
uint32_t zc_defer_destroy;
|
|
uint32_t zc_flags;
|
|
uint64_t zc_action_handle;
|
|
int zc_cleanup_fd;
|
|
uint8_t zc_simple;
|
|
uint8_t zc_pad[3]; /* alignment */
|
|
uint64_t zc_sendobj;
|
|
uint64_t zc_fromobj;
|
|
uint64_t zc_createtxg;
|
|
zfs_stat_t zc_stat;
|
|
} zfs_cmd_t;
|
|
|
|
typedef struct zfs_useracct {
|
|
char zu_domain[256];
|
|
uid_t zu_rid;
|
|
uint32_t zu_pad;
|
|
uint64_t zu_space;
|
|
} zfs_useracct_t;
|
|
|
|
#define ZFSDEV_MAX_MINOR (1 << 16)
|
|
#define ZFS_MIN_MINOR (ZFSDEV_MAX_MINOR + 1)
|
|
|
|
#define ZPOOL_EXPORT_AFTER_SPLIT 0x1
|
|
|
|
#ifdef _KERNEL
|
|
struct objset;
|
|
struct zfsvfs;
|
|
|
|
typedef struct zfs_creat {
|
|
nvlist_t *zct_zplprops;
|
|
nvlist_t *zct_props;
|
|
} zfs_creat_t;
|
|
|
|
extern int zfs_secpolicy_snapshot_perms(const char *, cred_t *);
|
|
extern int zfs_secpolicy_rename_perms(const char *, const char *, cred_t *);
|
|
extern int zfs_secpolicy_destroy_perms(const char *, cred_t *);
|
|
extern void zfs_unmount_snap(const char *);
|
|
extern void zfs_destroy_unmount_origin(const char *);
|
|
extern int getzfsvfs_impl(struct objset *, struct zfsvfs **);
|
|
extern int getzfsvfs(const char *, struct zfsvfs **);
|
|
|
|
enum zfsdev_state_type {
|
|
ZST_ONEXIT,
|
|
ZST_ZEVENT,
|
|
ZST_ALL,
|
|
};
|
|
|
|
/*
|
|
* The zfsdev_state_t structure is managed as a singly-linked list
|
|
* from which items are never deleted. This allows for lock-free
|
|
* reading of the list so long as assignments to the zs_next and
|
|
* reads from zs_minor are performed atomically. Empty items are
|
|
* indicated by storing -1 into zs_minor.
|
|
*/
|
|
typedef struct zfsdev_state {
|
|
struct zfsdev_state *zs_next; /* next zfsdev_state_t link */
|
|
struct file *zs_file; /* associated file struct */
|
|
minor_t zs_minor; /* made up minor number */
|
|
void *zs_onexit; /* onexit data */
|
|
void *zs_zevent; /* zevent data */
|
|
} zfsdev_state_t;
|
|
|
|
extern void *zfsdev_get_state(minor_t minor, enum zfsdev_state_type which);
|
|
extern int zfsdev_getminor(struct file *filp, minor_t *minorp);
|
|
extern minor_t zfsdev_minor_alloc(void);
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _SYS_ZFS_IOCTL_H */
|