Jesper Dangaard Brouer 4c03bdd7b5 xdp: adjust xdp redirect tracepoint to include return error code ...

The return error code need to be included in the tracepoint
xdp:xdp_redirect, else its not possible to distinguish successful or
failed XDP_REDIRECT transmits.

XDP have no queuing mechanism. Thus, it is fairly easily to overrun a
NIC transmit queue.  The eBPF program invoking helpers (bpf_redirect
or bpf_redirect_map) to redirect a packet doesn't get any feedback
whether the packet was actually transmitted.

Info on failed transmits in the tracepoint xdp:xdp_redirect, is
interesting as this opens for providing a feedback-loop to the
receiving XDP program.

Signed-off-by: Jesper Dangaard Brouer <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

2017-08-18 16:18:40 -07:00

..

events

xdp: adjust xdp redirect tracepoint to include return error code

2017-08-18 16:18:40 -07:00

define_trace.h

tracing: Introduce TRACE_EVENT_FN_COND macro

2015-12-23 14:27:21 -05:00

perf.h

tracing: Use outer () on __get_str() definition

2016-07-15 15:50:58 -04:00

syscall.h

…

trace_events.h

tracing: define TRACE_DEFINE_SIZEOF() macro to map sizeof's to their values

2017-06-13 17:10:57 -04:00