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package landlock
import ll "github.com/landlock-lsm/go-landlock/landlock/syscall"
type abiInfo struct {
version int
supportedAccessFS AccessFSSet
supportedAccessNet AccessNetSet
}
var abiInfos = []abiInfo{
{
version: 0,
supportedAccessFS: 0,
},
{
version: 1,
supportedAccessFS: (1 << 13) - 1,
},
{
version: 2,
supportedAccessFS: (1 << 14) - 1,
},
{
version: 3,
supportedAccessFS: (1 << 15) - 1,
},
{
version: 4,
supportedAccessFS: (1 << 15) - 1,
supportedAccessNet: (1 << 2) - 1,
},
{
version: 5,
supportedAccessFS: (1 << 16) - 1,
supportedAccessNet: (1 << 2) - 1,
},
}
func (a abiInfo) asConfig() Config {
return Config{
handledAccessFS: a.supportedAccessFS,
handledAccessNet: a.supportedAccessNet,
}
}
// getSupportedABIVersion returns the kernel-supported ABI version.
//
// If the ABI version supported by the kernel is higher than the
// newest one known to go-landlock, the highest ABI version known to
// go-landlock is returned.
func getSupportedABIVersion() abiInfo {
v, err := ll.LandlockGetABIVersion()
if err != nil {
v = 0 // ABI version 0 is "no Landlock support".
}
if v >= len(abiInfos) {
v = len(abiInfos) - 1
}
return abiInfos[v]
}
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