Thu, Feb 09, 2017 at 12:41:20AM CET, t...@herbertland.com wrote: >This patch creates an infrastructure for registering and running code at >XDP hooks in drivers. This extends and generalizes the original XDP/BPF >interface. Specifically, it defines a generic xdp_hook structure and a >set of hooks that can be assigned to devices or napi instances. These >hooks are also generic to allow for XDP/BPF programs as well as non-BPF >code (e.g. kernel code can be written in a module). > >An XDP hook is defined by the xdp_hook structure. A pointer to this >structure is passed into the XDP register function to set up a hook. >The XDP register function mallocs its own xdp_hook structure and copies >the values from the xdp_hook passed in. The register function also saves >the pointer value of the xdp_hook argument; this pointer is used in >subsequently calls to XDP to identify the registered hook. > >The interface is defined in net/xdp.h. This includes the definition of >xdp_hook, functions to register and unregister hooks on a device >or individual instances of napi, and xdp_hook_run that is called by >drivers to run the hooks. > >Signed-off-by: Tom Herbert <t...@herbertland.com> >--- > drivers/net/ethernet/netronome/nfp/nfp_bpf_jit.c | 1 + > include/linux/filter.h | 10 +- > include/linux/netdev_features.h | 3 +- > include/linux/netdevice.h | 16 ++ > include/net/xdp.h | 310 +++++++++++++++++++++++ > include/trace/events/xdp.h | 31 +++ > kernel/bpf/core.c | 1 + > net/core/Makefile | 2 +- > net/core/dev.c | 53 ++-- > net/core/filter.c | 1 + > net/core/rtnetlink.c | 14 +- > net/core/xdp.c | 304 ++++++++++++++++++++++ > 12 files changed, 711 insertions(+), 35 deletions(-) > create mode 100644 include/net/xdp.h > create mode 100644 net/core/xdp.c >
[...] >@@ -48,6 +49,36 @@ TRACE_EVENT(xdp_exception, > __print_symbolic(__entry->act, __XDP_ACT_SYM_TAB)) > ); > >+/* Temporaray trace function. This will be renamed to xdp_exception after all typo >+ * the calling drivers have been patched. >+ */
