CTLFLAG_ROOT
.sysctl_flags = SYSCTL_VERSION|CTLFLAG_ROOT|CTLTYPE_NODE,
.sysctl_flags = SYSCTL_VERSION|CTLFLAG_ROOT|CTLTYPE_NODE,
CTLFLAG_ROOT|CTLTYPE_NODE|CTLFLAG_READWRITE,
CTLFLAG_ROOT|CTLTYPE_NODE|CTLFLAG_READWRITE,
.sysctl_flags = SYSCTL_VERSION|CTLFLAG_ROOT|CTLTYPE_NODE,
CTLFLAG_ROOT|CTLFLAG_READWRITE|
pnode != NULL && !(pnode->sysctl_flags & CTLFLAG_ROOT);