mirror of
https://github.com/hanzoai/volume.git
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zeekay
b61441f7d7
A fork of Rancher's local-path-provisioner at v0.0.36. The behaviour is unchanged and deliberately so — a directory on the node a pod lands on is the right thing for a disk. What changes is identity. The provisioner answers to hanzo.ai/volume rather than rancher.io/local-path. That is not branding: two provisioners sharing one name race for the same claims, and a stock k3s carries the upstream one, so a cluster running both would settle our storage by chance. Data lives at /var/lib/hanzo/volume, so reading a Hanzo cluster does not mean learning another vendor's directory. Apache-2.0 as published, unaltered, with Rancher's attribution in NOTICE. The README says what this is not: durability. A volume here dies with its node. That is hanzoai/replicate's question, one layer up, and keeping the two apart is what lets the disk stay this simple.
86 lines
2.4 KiB
Go
86 lines
2.4 KiB
Go
// Copyright 2024 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package pkgbits
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// Version indicates a version of a unified IR bitstream.
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// Each Version indicates the addition, removal, or change of
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// new data in the bitstream.
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//
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// These are serialized to disk and the interpretation remains fixed.
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type Version uint32
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const (
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// V0: initial prototype.
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//
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// All data that is not assigned a Field is in version V0
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// and has not been deprecated.
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V0 Version = iota
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// V1: adds the Flags uint32 word
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V1
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// V2: removes unused legacy fields and supports type parameters for aliases.
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// - remove the legacy "has init" bool from the public root
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// - remove obj's "derived func instance" bool
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// - add a TypeParamNames field to ObjAlias
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// - remove derived info "needed" bool
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V2
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numVersions = iota
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)
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// Field denotes a unit of data in the serialized unified IR bitstream.
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// It is conceptually a like field in a structure.
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//
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// We only really need Fields when the data may or may not be present
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// in a stream based on the Version of the bitstream.
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//
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// Unlike much of pkgbits, Fields are not serialized and
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// can change values as needed.
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type Field int
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const (
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// Flags in a uint32 in the header of a bitstream
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// that is used to indicate whether optional features are enabled.
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Flags Field = iota
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// Deprecated: HasInit was a bool indicating whether a package
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// has any init functions.
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HasInit
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// Deprecated: DerivedFuncInstance was a bool indicating
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// whether an object was a function instance.
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DerivedFuncInstance
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// ObjAlias has a list of TypeParamNames.
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AliasTypeParamNames
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// Deprecated: DerivedInfoNeeded was a bool indicating
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// whether a type was a derived type.
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DerivedInfoNeeded
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numFields = iota
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)
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// introduced is the version a field was added.
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var introduced = [numFields]Version{
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Flags: V1,
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AliasTypeParamNames: V2,
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}
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// removed is the version a field was removed in or 0 for fields
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// that have not yet been deprecated.
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// (So removed[f]-1 is the last version it is included in.)
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var removed = [numFields]Version{
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HasInit: V2,
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DerivedFuncInstance: V2,
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DerivedInfoNeeded: V2,
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}
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// Has reports whether field f is present in a bitstream at version v.
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func (v Version) Has(f Field) bool {
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return introduced[f] <= v && (v < removed[f] || removed[f] == V0)
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}
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