On Fri, Apr 26, 2019 at 11:50 AM Matt Mullins <mmullins@xxxxxx> wrote: > > This adds an opt-in interface for tracepoints to expose a writable context to > BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE programs that are attached, while > supporting read-only access from existing BPF_PROG_TYPE_RAW_TRACEPOINT > programs, as well as from non-BPF-based tracepoints. > > The initial motivation is to support tracing that can be observed from the > remote end of an NBD socket, e.g. by adding flags to the struct nbd_request > header. Earlier attempts included adding an NBD-specific tracepoint fd, but in > code review, I was recommended to implement it more generically -- as a result, > this patchset is far simpler than my initial try. > > v4->v5: > * rebased onto bpf-next/master and fixed merge conflicts > * "tools: sync bpf.h" also syncs comments that have previously changed > in bpf-next Applied. Thanks!
