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check seccomp is configured in the kernel

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Signed-off-by: Jessica Frazelle <acidburn@docker.com>
This commit is contained in:
Jessica Frazelle 2016-01-11 11:44:34 -08:00
parent 7967aed912
commit 37926ea8f2
2 changed files with 16 additions and 0 deletions
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2
sysinfo/sysinfo.go
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@ -7,6 +7,8 @@ import "github.com/docker/docker/pkg/parsers"
type SysInfo struct { type SysInfo struct {
// Whether the kernel supports AppArmor or not // Whether the kernel supports AppArmor or not
AppArmor bool AppArmor bool
// Whether the kernel supports Seccomp or not
Seccomp bool
cgroupMemInfo cgroupMemInfo
cgroupCPUInfo cgroupCPUInfo

14
sysinfo/sysinfo_linux.go
View file

@ -5,11 +5,17 @@ import (
"os" "os"
"path" "path"
"strings" "strings"
"syscall"
"github.com/Sirupsen/logrus" "github.com/Sirupsen/logrus"
"github.com/opencontainers/runc/libcontainer/cgroups" "github.com/opencontainers/runc/libcontainer/cgroups"
) )
const (
// SeccompModeFilter refers to the syscall argument SECCOMP_MODE_FILTER.
SeccompModeFilter = uintptr(2)
)
// New returns a new SysInfo, using the filesystem to detect which features // New returns a new SysInfo, using the filesystem to detect which features
// the kernel supports. If `quiet` is `false` warnings are printed in logs // the kernel supports. If `quiet` is `false` warnings are printed in logs
// whenever an error occurs or misconfigurations are present. // whenever an error occurs or misconfigurations are present.
@ -32,6 +38,14 @@ func New(quiet bool) *SysInfo {
sysInfo.AppArmor = true sysInfo.AppArmor = true
} }
// Check if Seccomp is supported, via CONFIG_SECCOMP.
if _, _, err := syscall.RawSyscall(syscall.SYS_PRCTL, syscall.PR_GET_SECCOMP, 0, 0); err != syscall.EINVAL {
// Make sure the kernel has CONFIG_SECCOMP_FILTER.
if _, _, err := syscall.RawSyscall(syscall.SYS_PRCTL, syscall.PR_SET_SECCOMP, SeccompModeFilter, 0); err != syscall.EINVAL {
sysInfo.Seccomp = true
}
}
return sysInfo return sysInfo
} }