boot efi
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parent
645c617956
commit
18d3c42fc7
@ -7,6 +7,8 @@ import (
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"io/ioutil"
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"log"
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"os"
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"novit.tech/direktil/local-server/pkg/utf16"
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)
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func rmTempFile(f *os.File) {
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@ -60,3 +62,64 @@ func buildBootTar(out io.Writer, ctx *renderContext) (err error) {
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// done
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return nil
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}
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func buildBootEFITar(out io.Writer, ctx *renderContext) (err error) {
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arch := tar.NewWriter(out)
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defer arch.Close()
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archAdd := func(path string, ba []byte) (err error) {
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err = arch.WriteHeader(&tar.Header{Name: path, Mode: 0640, Size: int64(len(ba))})
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if err != nil {
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return
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}
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_, err = arch.Write(ba)
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return
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}
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const (
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prefix = "EFI/dkl/"
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efiPrefix = "\\EFI\\dkl\\"
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)
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// boot.csv
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// -> annoyingly it's UTF-16...
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bootCsvBytes := utf16.FromUTF8([]byte("" +
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"current_kernel.efi,dkl current,initrd=" + efiPrefix + "current_initrd.img,Direktil current\n" +
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"previous_kernel.efi,dkl previous,initrd=" + efiPrefix + "previous_initrd.img,Direktil previous\n"))
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err = archAdd(prefix+"BOOT.CSV", []byte(bootCsvBytes))
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if err != nil {
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return
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}
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// kernel
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kernelPath, err := ctx.distFetch("kernels", ctx.Host.Kernel)
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if err != nil {
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return
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}
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kernelBytes, err := ioutil.ReadFile(kernelPath)
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if err != nil {
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return
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}
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err = archAdd(prefix+"current_kernel.efi", kernelBytes)
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if err != nil {
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return
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}
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// initrd
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initrd := new(bytes.Buffer)
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err = buildInitrdV2(initrd, ctx)
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if err != nil {
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return
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}
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err = archAdd(prefix+"current_initrd.img", initrd.Bytes())
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if err != nil {
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return
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}
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// done
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return nil
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}
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@ -56,6 +56,9 @@ func (ws *wsHost) register(rws *restful.WebService, alterRB func(*restful.RouteB
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b("boot.tar").
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Produces(mime.TAR).
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Doc("Get the " + ws.hostDoc + "'s /boot archive (ie: for metal upgrades)"),
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b("boot-efi.tar").
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Produces(mime.TAR).
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Doc("Get the " + ws.hostDoc + "'s /boot archive (ie: for metal upgrades)"),
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// read-only ISO support
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b("boot.iso").
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@ -168,6 +171,8 @@ func renderHost(w http.ResponseWriter, r *http.Request, what string, host *local
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case "boot.tar":
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err = renderCtx(w, r, ctx, what, buildBootTar)
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case "boot-efi.tar":
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err = renderCtx(w, r, ctx, what, buildBootEFITar)
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case "boot.img":
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err = renderCtx(w, r, ctx, what, buildBootImg)
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29
pkg/utf16/utf16.go
Normal file
29
pkg/utf16/utf16.go
Normal file
@ -0,0 +1,29 @@
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package utf16
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import (
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"encoding/binary"
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"fmt"
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"unicode/utf8"
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)
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func FromUTF8(data []byte) (res []byte) {
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endian := binary.LittleEndian
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res = make([]byte, (len(data)+1)*2)
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res = res[:2]
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endian.PutUint16(res, 0xfeff)
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for len(data) > 0 {
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r, size := utf8.DecodeRune(data)
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if r > 65535 {
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panic(fmt.Errorf("r=0x%x > 0xffff", r))
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}
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slen := len(res)
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res = res[:slen+2]
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endian.PutUint16(res[slen:], uint16(r))
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data = data[size:]
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}
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return
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}
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