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Update module github.com/opencontainers/cgroups to v0.0.4

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Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
This commit is contained in:
renovate[bot]
2025-07-14 23:46:15 +00:00
committed by GitHub
parent 6b9a3066b6
commit df7d787b4c
5 changed files with 31 additions and 14 deletions
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32
vendor/github.com/opencontainers/cgroups/fs2/freezer.go generated vendored
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@@ -53,12 +53,9 @@ func setFreezer(dirPath string, state cgroups.FreezerState) error {
func getFreezer(dirPath string) (cgroups.FreezerState, error) {
fd, err := cgroups.OpenFile(dirPath, "cgroup.freeze", unix.O_RDONLY)
if err != nil {
// If the kernel is too old, then we just treat the freezer as being in
// an "undefined" state.
if os.IsNotExist(err) || errors.Is(err, unix.ENODEV) {
err = nil
}
return cgroups.Undefined, err
// If the kernel is too old, then we just treat the freezer as
// being in an "undefined" state and ignore the error.
return cgroups.Undefined, ignoreNotExistOrNoDeviceError(err)
}
defer fd.Close()
@@ -67,11 +64,15 @@ func getFreezer(dirPath string) (cgroups.FreezerState, error) {
func readFreezer(dirPath string, fd *os.File) (cgroups.FreezerState, error) {
if _, err := fd.Seek(0, 0); err != nil {
return cgroups.Undefined, err
// If the cgroup path is deleted at this point, then we just treat the freezer as
// being in an "undefined" state and ignore the error.
return cgroups.Undefined, ignoreNotExistOrNoDeviceError(err)
}
state := make([]byte, 2)
if _, err := fd.Read(state); err != nil {
return cgroups.Undefined, err
// If the cgroup path is deleted at this point, then we just treat the freezer as
// being in an "undefined" state and ignore the error.
return cgroups.Undefined, ignoreNotExistOrNoDeviceError(err)
}
switch string(state) {
case "0\n":
@@ -83,6 +84,21 @@ func readFreezer(dirPath string, fd *os.File) (cgroups.FreezerState, error) {
}
}
// ignoreNotExistOrNoDeviceError checks if the error is either a "not exist" error
// or a "no device" error, and returns nil in those cases. Otherwise, it returns the error.
func ignoreNotExistOrNoDeviceError(err error) error {
// We can safely ignore the error in the following two common situations:
// 1. The cgroup path does not exist at the time of opening(eg: the kernel is too old)
// — indicated by os.IsNotExist.
// 2. The cgroup path is deleted during the seek/read operation — indicated by
// errors.Is(err, unix.ENODEV).
// These conditions are expected and do not require special handling.
if os.IsNotExist(err) || errors.Is(err, unix.ENODEV) {
return nil
}
return err
}
// waitFrozen polls cgroup.events until it sees "frozen 1" in it.
func waitFrozen(dirPath string) (cgroups.FreezerState, error) {
fd, err := cgroups.OpenFile(dirPath, "cgroup.events", unix.O_RDONLY)