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// Copyright 2018 Google Inc.
//
// 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 boot
import "fmt"
// PlatformType tells which platform to use.
type PlatformType int
const (
// Ptrace runs the sandbox with the ptrace platform.
PlatformPtrace PlatformType = iota
// KVM runs the sandbox with the KVM platform.
PlatformKVM
)
// MakePlatformType converts type from string.
func MakePlatformType(s string) (PlatformType, error) {
switch s {
case "ptrace":
return PlatformPtrace, nil
case "kvm":
return PlatformKVM, nil
default:
return 0, fmt.Errorf("invalid platform type %q", s)
}
}
func (p PlatformType) String() string {
switch p {
case PlatformPtrace:
return "ptrace"
case PlatformKVM:
return "kvm"
default:
return fmt.Sprintf("unknown(%d)", p)
}
}
// FileAccessType tells how the filesystem is accessed.
type FileAccessType int
const (
// FileAccessProxy sends IO requests to a Gofer process that validates the
// requests and forwards them to the host.
FileAccessProxy FileAccessType = iota
// FileAccessDirect connects the sandbox directly to the host filesystem.
FileAccessDirect
)
// MakeFileAccessType converts type from string.
func MakeFileAccessType(s string) (FileAccessType, error) {
switch s {
case "proxy":
return FileAccessProxy, nil
case "direct":
return FileAccessDirect, nil
default:
return 0, fmt.Errorf("invalid file access type %q", s)
}
}
func (f FileAccessType) String() string {
switch f {
case FileAccessProxy:
return "proxy"
case FileAccessDirect:
return "direct"
default:
return fmt.Sprintf("unknown(%d)", f)
}
}
// NetworkType tells which network stack to use.
type NetworkType int
const (
// NetworkSandbox uses internal network stack, isolated from the host.
NetworkSandbox NetworkType = iota
// NetworkHost redirects network related syscalls to the host network.
NetworkHost
// NetworkNone sets up just loopback using netstack.
NetworkNone
)
// MakeNetworkType converts type from string.
func MakeNetworkType(s string) (NetworkType, error) {
switch s {
case "sandbox":
return NetworkSandbox, nil
case "host":
return NetworkHost, nil
case "none":
return NetworkNone, nil
default:
return 0, fmt.Errorf("invalid network type %q", s)
}
}
func (n NetworkType) String() string {
switch n {
case NetworkSandbox:
return "sandbox"
case NetworkHost:
return "host"
case NetworkNone:
return "none"
default:
return fmt.Sprintf("unknown(%d)", n)
}
}
// Config holds configuration that is not part of the runtime spec.
type Config struct {
// RootDir is the runtime root directory.
RootDir string
// FileAccess indicates how the filesystem is accessed.
FileAccess FileAccessType
// Overlay is whether to wrap the root filesystem in an overlay.
Overlay bool
// Network indicates what type of network to use.
Network NetworkType
// LogPackets indicates that all network packets should be logged.
LogPackets bool
// Platform is the platform to run on.
Platform PlatformType
// Strace indicates that strace should be enabled.
Strace bool
// StraceSyscalls is the set of syscalls to trace. If StraceEnable is
// true and this list is empty, then all syscalls will be traced.
StraceSyscalls []string
// StraceLogSize is the max size of data blobs to display.
StraceLogSize uint
// DisableSeccomp indicates whether seccomp syscall filters should be
// disabled. Pardon the double negation, but default to enabled is important.
DisableSeccomp bool
}
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