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out-of-tree/kernel_linux.go

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// Copyright 2023 Mikhail Klementev. All rights reserved.
// Use of this source code is governed by a AGPLv3 license
// (or later) that can be found in the LICENSE file.
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//go:build linux
// +build linux
package main
import (
"io/ioutil"
"os/exec"
"strings"
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"github.com/rs/zerolog/log"
"github.com/zcalusic/sysinfo"
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"code.dumpstack.io/tools/out-of-tree/config"
"code.dumpstack.io/tools/out-of-tree/container"
"code.dumpstack.io/tools/out-of-tree/fs"
)
func genHostKernels(download bool) (kcfg config.KernelConfig, err error) {
si := sysinfo.SysInfo{}
si.GetSysInfo()
distroType, err := config.NewDistroType(si.OS.Vendor)
if err != nil {
return
}
cmd := exec.Command("ls", "/lib/modules")
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log.Debug().Msgf("%v", cmd)
rawOutput, err := cmd.CombinedOutput()
if err != nil {
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log.Print(string(rawOutput), err)
return
}
kernelsBase := "/boot/"
bootfiles, err := ioutil.ReadDir(kernelsBase)
if err != nil {
return
}
// only for compatibility, docker is not really used
dii := container.Image{
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Name: config.KernelMask{
DistroType: distroType,
DistroRelease: si.OS.Version,
}.DockerName(),
}
rootfs, err := genRootfsImage(dii, download)
if err != nil {
return
}
for _, krel := range strings.Fields(string(rawOutput)) {
log.Debug().Msgf("generate config entry for %s", krel)
var kernelFile, initrdFile string
kernelFile, err = findKernelFile(bootfiles, krel)
if err != nil {
log.Warn().Msgf("cannot find kernel %s", krel)
continue
}
initrdFile, err = findInitrdFile(bootfiles, krel)
if err != nil {
log.Warn().Msgf("cannot find initrd %s", krel)
continue
}
ki := config.KernelInfo{
DistroType: distroType,
DistroRelease: si.OS.Version,
KernelRelease: krel,
KernelSource: "/lib/modules/" + krel + "/build",
KernelPath: kernelsBase + kernelFile,
InitrdPath: kernelsBase + initrdFile,
RootFS: rootfs,
}
vmlinux := "/usr/lib/debug/boot/vmlinux-" + krel
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log.Print("vmlinux", vmlinux)
if fs.PathExists(vmlinux) {
ki.VmlinuxPath = vmlinux
}
kcfg.Kernels = append(kcfg.Kernels, ki)
}
return
}