112 lines
2.9 KiB
Go
112 lines
2.9 KiB
Go
package kernel
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import (
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"fmt"
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"github.com/hpcng/warewulf/internal/pkg/config"
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"github.com/hpcng/warewulf/internal/pkg/errors"
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"github.com/hpcng/warewulf/internal/pkg/util"
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"github.com/hpcng/warewulf/internal/pkg/wwlog"
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"io/ioutil"
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"os"
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"os/exec"
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"path"
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)
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func ParentDir() string {
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return path.Join(config.LocalStateDir, "provision/kernel")
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}
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func KernelImage(kernelVersion string) string {
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if kernelVersion == "" {
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wwlog.Printf(wwlog.ERROR, "Kernel Version is not defined\n")
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return ""
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}
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if util.ValidString(kernelVersion, "^[a-zA-Z0-9-._]+$") == false {
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wwlog.Printf(wwlog.ERROR, "Runtime overlay name contains illegal characters: %s\n", kernelVersion)
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return ""
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}
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return path.Join(ParentDir(), kernelVersion, "vmlinuz")
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}
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func KmodsImage(kernelVersion string) string {
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if kernelVersion == "" {
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wwlog.Printf(wwlog.ERROR, "Kernel Version is not defined\n")
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return ""
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}
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if util.ValidString(kernelVersion, "^[a-zA-Z0-9-._]+$") == false {
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wwlog.Printf(wwlog.ERROR, "Runtime overlay name contains illegal characters: %s\n", kernelVersion)
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return ""
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}
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return path.Join(ParentDir(), kernelVersion, "kmods.img")
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}
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func ListKernels() ([]string, error) {
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var ret []string
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err := os.MkdirAll(ParentDir(), 0755)
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if err != nil {
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return ret, errors.New("Could not create Kernel parent directory: " + ParentDir())
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}
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wwlog.Printf(wwlog.DEBUG, "Searching for Kernel image directories: %s\n", ParentDir())
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kernels, err := ioutil.ReadDir(ParentDir())
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if err != nil {
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return ret, err
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}
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for _, kernel := range kernels {
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wwlog.Printf(wwlog.VERBOSE, "Found Kernel: %s\n", kernel.Name())
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ret = append(ret, kernel.Name())
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}
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return ret, nil
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}
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func Build(kernelVersion string) error {
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kernelImage := "/boot/vmlinuz-" + kernelVersion
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kernelDrivers := "/lib/modules/" + kernelVersion
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kernelDestination := KernelImage(kernelVersion)
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driversDestination := KmodsImage(kernelVersion)
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// Create the destination paths just in case it doesn't exist
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os.MkdirAll(path.Dir(kernelDestination), 0755)
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os.MkdirAll(path.Dir(driversDestination), 0755)
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if util.IsFile(kernelImage) == false {
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return errors.New("Could not locate kernel image: " + kernelImage)
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}
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if util.IsDir(kernelDrivers) == false {
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return errors.New("Could not locate kernel drivers: " + kernelDrivers)
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}
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wwlog.Printf(wwlog.VERBOSE, "Setting up Kernel\n")
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if _, err := os.Stat(kernelImage); err == nil {
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err := util.CopyFile(kernelImage, kernelDestination)
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if err != nil {
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return err
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}
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wwlog.Printf(wwlog.INFO, "%-45s: Done\n", "vmlinuz-"+kernelVersion)
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}
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wwlog.Printf(wwlog.VERBOSE, "Building Kernel driver image\n")
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if _, err := os.Stat(kernelDrivers); err == nil {
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cmd := fmt.Sprintf("cd /; find .%s | cpio --quiet -o -H newc -F \"%s\"", kernelDrivers, driversDestination)
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err := exec.Command("/bin/sh", "-c", cmd).Run()
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if err != nil {
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return err
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}
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wwlog.Printf(wwlog.INFO, "%-45s: Done\n", "kmods-"+kernelVersion+".img")
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}
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return nil
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}
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