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fix[close #273]: Old kernel files are not deleted
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| package core | ||
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| /* License: GPLv3 | ||
| Authors: | ||
| Mirko Brombin <[email protected]> | ||
| Vanilla OS Contributors <https://github.com/vanilla-os/> | ||
| Copyright: 2024 | ||
| Description: | ||
| ABRoot is utility which provides full immutability and | ||
| atomicity to a Linux system, by transacting between | ||
| two root filesystems. Updates are performed using OCI | ||
| images, to ensure that the system is always in a | ||
| consistent state. | ||
| */ | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "os" | ||
| "path" | ||
| "path/filepath" | ||
| "strings" | ||
|
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| "github.com/hashicorp/go-version" | ||
| ) | ||
|
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| // getKernelVersion returns the latest kernel version available in the root | ||
| func getKernelVersion(bootPath string) string { | ||
| PrintVerboseInfo("getKernelVersion", "running...") | ||
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| kernelDir := filepath.Join(bootPath, "vmlinuz-*") | ||
| files, err := filepath.Glob(kernelDir) | ||
| if err != nil { | ||
| PrintVerboseErr("getKernelVersion", 0, err) | ||
| return "" | ||
| } | ||
|
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| if len(files) == 0 { | ||
| PrintVerboseErr("getKernelVersion", 1, errors.New("no kernel found")) | ||
| return "" | ||
| } | ||
|
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| var maxVer *version.Version | ||
| for _, file := range files { | ||
| verStr := filepath.Base(file)[8:] | ||
| ver, err := version.NewVersion(verStr) | ||
| if err != nil { | ||
| continue | ||
| } | ||
| if maxVer == nil || ver.GreaterThan(maxVer) { | ||
| maxVer = ver | ||
| } | ||
| } | ||
|
|
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| if maxVer != nil { | ||
| return maxVer.String() | ||
| } | ||
|
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| return "" | ||
| } | ||
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| // cleanupOldKernels removes kernels not used by future root from the | ||
| // init partition. | ||
| // | ||
| // NOTE: this only works with LVM Think Provisioning turned on in ABRoot. Also | ||
| // note that this function explicitly removes all kernels except the | ||
| // one passed as argument, we can't just remove older versions because | ||
| // the kernel versioning is not guaranteed to be incremental, e.g. an | ||
| // update could introduce an older kernel version. | ||
| func cleanupOldKernels(newKernelVer string, initMountpoint string, partFuture string) (err error) { | ||
| fmt.Println(path.Join(initMountpoint, partFuture)) | ||
| files, err := os.ReadDir(path.Join(initMountpoint, partFuture)) | ||
| if err != nil { | ||
| return | ||
| } | ||
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| for _, file := range files { | ||
| if strings.HasPrefix(file.Name(), "vmlinuz-") && file.Name() != "vmlinuz-"+newKernelVer { | ||
| err = os.Remove(path.Join(initMountpoint, partFuture, file.Name())) | ||
| if err != nil { | ||
| return | ||
| } | ||
| } | ||
| if strings.HasPrefix(file.Name(), "initrd.img-") && file.Name() != "initrd.img-"+newKernelVer { | ||
| err = os.Remove(path.Join(initMountpoint, partFuture, file.Name())) | ||
| if err != nil { | ||
| return | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| } |
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