mirror of
https://github.com/containerd/containerd.git
synced 2026-08-08 17:11:15 +00:00
296f917d5d
The package was moved to a separate module; update the links to make it easier to discover the current version of upstream. Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
87 lines
2.8 KiB
Go
87 lines
2.8 KiB
Go
/*
|
|
Copyright The containerd Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
// SPDX-FileCopyrightText: Copyright The containerd Authors
|
|
// SPDX-FileCopyrightText: Copyright The Moby Authors
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
//
|
|
// File copied and customized based on
|
|
// https://github.com/moby/profiles/blob/seccomp/v0.2.3/seccomp/kernel_linux.go
|
|
|
|
package kernelversion
|
|
|
|
import (
|
|
"fmt"
|
|
"sync"
|
|
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
// KernelVersion holds information about the kernel.
|
|
type KernelVersion struct {
|
|
Kernel uint64 // Version of the Kernel (i.e., the "4" in "4.1.2-generic")
|
|
Major uint64 // Major revision of the Kernel (i.e., the "1" in "4.1.2-generic")
|
|
}
|
|
|
|
// String implements fmt.Stringer for KernelVersion
|
|
func (k *KernelVersion) String() string {
|
|
if k.Kernel > 0 || k.Major > 0 {
|
|
return fmt.Sprintf("%d.%d", k.Kernel, k.Major)
|
|
}
|
|
return ""
|
|
}
|
|
|
|
// getKernelVersion gets the current kernel version.
|
|
var getKernelVersion = sync.OnceValues(func() (*KernelVersion, error) {
|
|
var uts unix.Utsname
|
|
if err := unix.Uname(&uts); err != nil {
|
|
return nil, err
|
|
}
|
|
// Convert the NUL-terminated release field before parsing.
|
|
return parseRelease(unix.ByteSliceToString(uts.Release[:]))
|
|
})
|
|
|
|
// parseRelease parses a string and creates a KernelVersion based on it.
|
|
func parseRelease(release string) (*KernelVersion, error) {
|
|
var version KernelVersion
|
|
|
|
// We're only make sure we get the "kernel" and "major revision". Sometimes we have
|
|
// 3.12.25-gentoo, but sometimes we just have 3.12-1-amd64.
|
|
_, err := fmt.Sscanf(release, "%d.%d", &version.Kernel, &version.Major)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to parse kernel version %q: %w", release, err)
|
|
}
|
|
return &version, nil
|
|
}
|
|
|
|
// GreaterEqualThan checks if the host's kernel version is greater than, or
|
|
// equal to the given kernel version v. Only "kernel version" and "major revision"
|
|
// can be specified (e.g., "3.12") and will be taken into account, which means
|
|
// that 3.12.25-gentoo and 3.12-1-amd64 are considered equal (kernel: 3, major: 12).
|
|
func GreaterEqualThan(minVersion KernelVersion) (bool, error) {
|
|
kv, err := getKernelVersion()
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
if kv.Kernel > minVersion.Kernel {
|
|
return true, nil
|
|
}
|
|
if kv.Kernel == minVersion.Kernel && kv.Major >= minVersion.Major {
|
|
return true, nil
|
|
}
|
|
return false, nil
|
|
}
|