101 lines
2.5 KiB
Go
101 lines
2.5 KiB
Go
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// +build linux,seccomp
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package daemon
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import (
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"encoding/json"
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"fmt"
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"github.com/Sirupsen/logrus"
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"github.com/docker/docker/container"
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"github.com/docker/engine-api/types"
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"github.com/opencontainers/specs/specs-go"
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)
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func setSeccomp(daemon *Daemon, rs *specs.Spec, c *container.Container) error {
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var seccomp *specs.Seccomp
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var err error
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if c.HostConfig.Privileged {
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return nil
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}
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if !daemon.seccompEnabled {
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if c.SeccompProfile != "" && c.SeccompProfile != "unconfined" {
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return fmt.Errorf("Seccomp is not enabled in your kernel, cannot run a custom seccomp profile.")
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}
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logrus.Warn("Seccomp is not enabled in your kernel, running container without default profile.")
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c.SeccompProfile = "unconfined"
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}
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if c.SeccompProfile == "unconfined" {
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return nil
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}
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if c.SeccompProfile != "" {
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seccomp, err = loadSeccompProfile(c.SeccompProfile)
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if err != nil {
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return err
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}
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} else {
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seccomp = &defaultSeccompProfile
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}
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rs.Linux.Seccomp = seccomp
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return nil
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}
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func loadSeccompProfile(body string) (*specs.Seccomp, error) {
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var config types.Seccomp
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if err := json.Unmarshal([]byte(body), &config); err != nil {
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return nil, fmt.Errorf("Decoding seccomp profile failed: %v", err)
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}
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return setupSeccomp(&config)
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}
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func setupSeccomp(config *types.Seccomp) (newConfig *specs.Seccomp, err error) {
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if config == nil {
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return nil, nil
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}
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// No default action specified, no syscalls listed, assume seccomp disabled
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if config.DefaultAction == "" && len(config.Syscalls) == 0 {
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return nil, nil
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}
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newConfig = &specs.Seccomp{}
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// if config.Architectures == 0 then libseccomp will figure out the architecture to use
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if len(config.Architectures) > 0 {
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// newConfig.Architectures = []string{}
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for _, arch := range config.Architectures {
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newConfig.Architectures = append(newConfig.Architectures, specs.Arch(arch))
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}
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}
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newConfig.DefaultAction = specs.Action(config.DefaultAction)
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// Loop through all syscall blocks and convert them to libcontainer format
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for _, call := range config.Syscalls {
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newCall := specs.Syscall{
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Name: call.Name,
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Action: specs.Action(call.Action),
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}
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// Loop through all the arguments of the syscall and convert them
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for _, arg := range call.Args {
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newArg := specs.Arg{
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Index: arg.Index,
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Value: arg.Value,
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ValueTwo: arg.ValueTwo,
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Op: specs.Operator(arg.Op),
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}
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newCall.Args = append(newCall.Args, newArg)
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}
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newConfig.Syscalls = append(newConfig.Syscalls, newCall)
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}
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return newConfig, nil
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}
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