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// Copyright 2021 The gVisor 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.
package cmd
import (
"context"
"io/ioutil"
"github.com/google/subcommands"
"gvisor.dev/gvisor/pkg/log"
"gvisor.dev/gvisor/runsc/flag"
"gvisor.dev/gvisor/runsc/mitigate"
)
// Mitigate implements subcommands.Command for the "mitigate" command.
type Mitigate struct {
mitigate mitigate.Mitigate
}
// Name implements subcommands.command.name.
func (*Mitigate) Name() string {
return "mitigate"
}
// Synopsis implements subcommands.Command.Synopsis.
func (*Mitigate) Synopsis() string {
return "mitigate mitigates the underlying system against side channel attacks"
}
// Usage implements subcommands.Command.Usage.
func (m *Mitigate) Usage() string {
return m.mitigate.Usage()
}
// SetFlags implements subcommands.Command.SetFlags.
func (m *Mitigate) SetFlags(f *flag.FlagSet) {
m.mitigate.SetFlags(f)
}
// Execute implements subcommands.Command.Execute.
func (m *Mitigate) Execute(_ context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus {
if f.NArg() != 0 {
f.Usage()
return subcommands.ExitUsageError
}
const path = "/proc/cpuinfo"
data, err := ioutil.ReadFile(path)
if err != nil {
log.Warningf("Failed to read %s: %v", path, err)
return subcommands.ExitFailure
}
if err := m.mitigate.Execute(data); err != nil {
log.Warningf("Execute failed: %v", err)
return subcommands.ExitFailure
}
return subcommands.ExitSuccess
}
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