Try<Nothing> check()
{
// As advised in libnl, we use numeric values, instead of defined
// macros (which creates compile time dependency), to check
// capabilities.
// Check NL_CAPABILITY_ROUTE_LINK_VETH_GET_PEER_OWN_REFERENCE.
if (nl_has_capability(2) == 0) {
return Error(
"Capability ROUTE_LINK_VETH_GET_PEER_OWN_REFERENCE is not available");
}
// Check NL_CAPABILITY_ROUTE_LINK_CLS_ADD_ACT_OWN_REFERENCE.
if (nl_has_capability(3) == 0) {
return Error(
"Capability ROUTE_LINK_CLS_ADD_ACT_OWN_REFERENCE is not available");
}
// There is a bug in libnl3-idiag from duplicating a kernel header
// definition and running certain check logic based on it. The
// kernel header it copies is from 3.6. Older kernels have a
// different definition and therefore return error on certain calls.
// TODO(chzhcn): remove this once the bug in libnl3-idiag is fixed.
if (SK_MEMINFO_VARS == 7) {
return Error(
"libnl3-idiag module has a known bug on kernels older than 3.6");
}
return Nothing();
}
Try<Nothing> check()
{
// As advised in libnl, we use numeric values, instead of defined
// macros (which creates compile time dependency), to check
// capabilities.
// Check NL_CAPABILITY_ROUTE_LINK_VETH_GET_PEER_OWN_REFERENCE.
if (nl_has_capability(2) == 0) {
return Error(
"Capability ROUTE_LINK_VETH_GET_PEER_OWN_REFERENCE is not available");
}
// Check NL_CAPABILITY_ROUTE_LINK_CLS_ADD_ACT_OWN_REFERENCE.
if (nl_has_capability(3) == 0) {
return Error(
"Capability ROUTE_LINK_CLS_ADD_ACT_OWN_REFERENCE is not available");
}
return Nothing();
}