[Libguestfs] [libnbd PATCH 0/7] state machine refactoring

I'm still playing with ideas on how to split rstate from wstate (so that we can send a request without waiting for POLLIN to complete a pending reply), but this is some preliminary refactoring I found useful. I also fixed a couple of bugs while in the area (already pushed). There's a question of whether we want nbd_handle to be nearly 5k, or if we should instead keep it small and add one more indirection where sbuf is malloc'd; I'm not sure that it matters much (outside of libnbd, nbd_handle is an opaque type always referenced as a pointer). Eric Blake (7): states: Log structured error messages, if any states: Refactor SET_META_CONTEXT reply parsing states: Allow large SET_CONTEXT_NAME replies states: Rewrite NBD_REP_INFO parsing states: Factor out NBD_REP payload prep states: Give up on oversized reply length states: Capture NBD_REP_ERR message generator/generator | 19 ++-- generator/states-newstyle-opt-go.c | 71 ++++++------- .../states-newstyle-opt-set-meta-context.c | 99 +++++++------------ generator/states-newstyle-opt-starttls.c | 39 ++------ .../states-newstyle-opt-structured-reply.c | 34 +++---- generator/states-newstyle.c | 90 +++++++++++++++++ generator/states-reply-structured.c | 23 ++++- lib/internal.h | 4 +- 8 files changed, 207 insertions(+), 172 deletions(-) -- 2.20.1