mirror of
https://github.com/hanzoai/volume.git
synced 2026-10-01 00:48:00 +00:00
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.
70 lines
2.4 KiB
Go
70 lines
2.4 KiB
Go
package cbor
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import (
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"errors"
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"fmt"
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"reflect"
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)
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// SimpleValue represents CBOR simple value.
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// CBOR simple value is:
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// - an extension point like CBOR tag.
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// - a subset of CBOR major type 7 that isn't floating-point.
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// - "identified by a number between 0 and 255, but distinct from that number itself".
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// For example, "a simple value 2 is not equivalent to an integer 2" as a CBOR map key.
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//
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// CBOR simple values identified by 20..23 are: "false", "true" , "null", and "undefined".
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// Other CBOR simple values are currently unassigned/reserved by IANA.
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type SimpleValue uint8
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var (
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typeSimpleValue = reflect.TypeOf(SimpleValue(0))
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)
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// MarshalCBOR encodes SimpleValue as CBOR simple value (major type 7).
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func (sv SimpleValue) MarshalCBOR() ([]byte, error) {
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// RFC 8949 3.3. Floating-Point Numbers and Values with No Content says:
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// "An encoder MUST NOT issue two-byte sequences that start with 0xf8
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// (major type 7, additional information 24) and continue with a byte
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// less than 0x20 (32 decimal). Such sequences are not well-formed.
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// (This implies that an encoder cannot encode false, true, null, or
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// undefined in two-byte sequences and that only the one-byte variants
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// of these are well-formed; more generally speaking, each simple value
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// only has a single representation variant)."
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switch {
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case sv <= maxSimpleValueInAdditionalInformation:
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return []byte{byte(cborTypePrimitives) | byte(sv)}, nil
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case sv >= minSimpleValueIn1ByteArgument:
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return []byte{byte(cborTypePrimitives) | additionalInformationWith1ByteArgument, byte(sv)}, nil
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default:
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return nil, &UnsupportedValueError{msg: fmt.Sprintf("SimpleValue(%d)", sv)}
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}
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}
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// UnmarshalCBOR decodes CBOR simple value (major type 7) to SimpleValue.
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func (sv *SimpleValue) UnmarshalCBOR(data []byte) error {
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if sv == nil {
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return errors.New("cbor.SimpleValue: UnmarshalCBOR on nil pointer")
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}
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d := decoder{data: data, dm: defaultDecMode}
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typ, ai, val := d.getHead()
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if typ != cborTypePrimitives {
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return &UnmarshalTypeError{CBORType: typ.String(), GoType: "SimpleValue"}
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}
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if ai > additionalInformationWith1ByteArgument {
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return &UnmarshalTypeError{CBORType: typ.String(), GoType: "SimpleValue", errorMsg: "not simple values"}
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}
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// It is safe to cast val to uint8 here because
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// - data is already verified to be well-formed CBOR simple value and
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// - val is <= math.MaxUint8.
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*sv = SimpleValue(val)
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return nil
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}
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