On 7/21/23 10:22 PM, kuifeng@xxxxxxxx wrote:
From: Kui-Feng Lee <kuifeng@xxxxxxxx>
Provide bpf_copy_from_user() and bpf_copy_to_user() to the BPF programs
attached to cgroup/{set,get}sockopt. bpf_copy_to_user() is a new kfunc to
Allowing bpf_copy_to_user() in setsockopt will then change the "__user *optval". I don't think the userspace is expecting any change in the optval passed to setsockopt.
