On Mon, Feb 27, 2023 at 08:01:17PM -0800, Alexei Starovoitov wrote: > From: Alexei Starovoitov <ast@xxxxxxxxxx> > > __kptr meant to store PTR_UNTRUSTED kernel pointers inside bpf maps. > The concept felt useful, but didn't get much traction, > since bpf_rdonly_cast() was added soon after and bpf programs received > a simpler way to access PTR_UNTRUSTED kernel pointers > without going through restrictive __kptr usage. > > Rename __kptr_ref -> __kptr and __kptr -> __kptr_untrusted to indicate > its intended usage. > The main goal of __kptr_untrusted was to read/write such pointers > directly while bpf_kptr_xchg was a mechanism to access refcnted > kernel pointers. The next patch will allow RCU protected __kptr access > with direct read. At that point __kptr_untrusted will be deprecated. > > Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx> Acked-by: David Vernet <void@xxxxxxxxxxxxx>
