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chore: drop unused package

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It was implemented to support Firecracker which wasn't able to load
compressed Linux kernels.

Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
This commit is contained in:
Andrey Smirnov 2021-12-06 16:34:04 +03:00
parent 961d1567d9
commit adf05072ac
No known key found for this signature in database
GPG Key ID: 7B26396447AB6DFD
3 changed files with 2 additions and 80 deletions
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5
go.mod
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@ -22,7 +22,7 @@ require (
k8s.io/apiserver v0.23.0-alpha.4 // indirect
k8s.io/cli-runtime v0.23.0-alpha.4 // indirect
k8s.io/client-go v0.23.0-alpha.4
k8s.io/component-base v0.23.0-alpha.4 // indirect
k8s.io/component-base v0.23.0-alpha.4
k8s.io/cri-api v0.23.0-alpha.4
k8s.io/kubectl v0.23.0-alpha.4
k8s.io/kubelet v0.23.0-alpha.4
@ -36,7 +36,6 @@ require (
github.com/containerd/cgroups v1.0.2
github.com/containerd/containerd v1.5.8
github.com/containerd/cri v1.19.0
github.com/containerd/go-cni v1.1.0
github.com/containerd/typeurl v1.0.2
github.com/containernetworking/cni v1.0.1
github.com/containernetworking/plugins v1.0.1
@ -79,7 +78,6 @@ require (
github.com/rs/xid v1.3.0
github.com/ryanuber/columnize v2.1.2+incompatible
github.com/scaleway/scaleway-sdk-go v1.0.0-beta.7
github.com/smira/go-xz v0.0.0-20201019130106-9921ed7a9935
github.com/spf13/cobra v1.2.1
github.com/stretchr/testify v1.7.0
github.com/talos-systems/crypto v0.3.4
@ -152,6 +150,7 @@ require (
github.com/cilium/ebpf v0.7.0 // indirect
github.com/containerd/continuity v0.1.0 // indirect
github.com/containerd/fifo v1.0.0 // indirect
github.com/containerd/go-cni v1.1.0 // indirect
github.com/containerd/ttrpc v1.1.0 // indirect
github.com/coreos/go-systemd/v22 v22.3.2 // indirect
github.com/cpuguy83/go-md2man/v2 v2.0.0 // indirect

2
go.sum
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@ -1003,8 +1003,6 @@ github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1
github.com/smartystreets/goconvey v0.0.0-20190330032615-68dc04aab96a/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
github.com/smartystreets/goconvey v1.6.4 h1:fv0U8FUIMPNf1L9lnHLvLhgicrIVChEkdzIKYqbNC9s=
github.com/smartystreets/goconvey v1.6.4/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
github.com/smira/go-xz v0.0.0-20201019130106-9921ed7a9935 h1:64eGQ94st1udqkO66IaMG05KGThUJcXHqyE6UeKQBoE=
github.com/smira/go-xz v0.0.0-20201019130106-9921ed7a9935/go.mod h1:smSuTvETRIkX95VAIWBdKoGJuUxif7NT7FgbkpVqOiA=
github.com/smira/tcpproxy v0.0.0-20201015133617-de5f7797b95b h1:95WXQlM2dDPgIXTlnpwiJPa0l0ipl1RwMvdy8KLUyH8=
github.com/smira/tcpproxy v0.0.0-20201015133617-de5f7797b95b/go.mod h1:yDIWrelwlTRXdKvQqqQ+8lCwCjbSRtkat49REnui7hk=
github.com/soheilhy/cmux v0.1.4/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4kGIyLM=

75
pkg/provision/internal/vmlinuz/vmlinuz.go
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@ -1,75 +0,0 @@
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
// Package vmlinuz provides utilities for reading bzImage kernel format.
package vmlinuz
import (
"bytes"
"compress/bzip2"
"compress/gzip"
"fmt"
"io"
"io/ioutil"
"github.com/smira/go-xz"
)
type decompressFunc func(io.Reader) (io.ReadCloser, error)
// Based on https://github.com/torvalds/linux/blob/master/scripts/extract-vmlinux.
var bzImageMagic = []struct {
magic []byte
reader decompressFunc
}{
{
magic: []byte("\3757zXZ\000"),
reader: func(r io.Reader) (io.ReadCloser, error) {
return xz.NewReader(r)
},
},
{
magic: []byte("\037\213\010"),
reader: func(r io.Reader) (io.ReadCloser, error) {
return gzip.NewReader(r)
},
},
{
magic: []byte("BZh"),
reader: func(r io.Reader) (io.ReadCloser, error) {
return ioutil.NopCloser(bzip2.NewReader(r)), nil
},
},
}
// Decompress the bzImage Linux kernel format and extract vmlinux kernel.
//
// Only following formats are supported: gzip, xz and bzip2.
func Decompress(r io.Reader) (io.ReadCloser, error) {
// read first 64Kb and look for signature
head := make([]byte, 65536)
if _, err := io.ReadFull(r, head); err != nil {
return nil, fmt.Errorf("error reading 64Kb vmlinuz head: %w", err)
}
start := -1
var decompress decompressFunc
for _, matcher := range bzImageMagic {
start = bytes.Index(head, matcher.magic)
if start != -1 {
decompress = matcher.reader
break
}
}
if start == -1 {
return nil, fmt.Errorf("error looking for vmlinuz magic")
}
return decompress(io.MultiReader(bytes.NewReader(head[start:]), r))
}