On 4/24/19 12:07 PM, Matt Mullins wrote: > This is an opt-in interface that allows a tracepoint to provide a safe > buffer that can be written from a BPF_PROG_TYPE_RAW_TRACEPOINT program. > The size of the buffer must be a compile-time constant, and is checked > before allowing a BPF program to attach to a tracepoint that uses this > feature. > > The pointer to this buffer will be the first argument of tracepoints > that opt in; the pointer is valid and can be bpf_probe_read() by both > BPF_PROG_TYPE_RAW_TRACEPOINT and BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE > programs that attach to such a tracepoint, but the buffer to which it > points may only be written by the latter. > > Signed-off-by: Matt Mullins <mmullins@xxxxxx> Acked-by: Yonghong Song <yhs@xxxxxx>
