Searched hist:"4 c03bdd7b5c084c3c6973cb2419edac5363c051f" (Results 1 – 2 of 2) sorted by relevance
| /openbmc/linux/include/trace/events/ |
| H A D | xdp.h | diff 4c03bdd7b5c084c3c6973cb2419edac5363c051f Thu Aug 17 11:22:37 CDT 2017 Jesper Dangaard Brouer <brouer@redhat.com> 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 <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
| /openbmc/linux/net/core/ |
| H A D | filter.c | diff 4c03bdd7b5c084c3c6973cb2419edac5363c051f Thu Aug 17 11:22:37 CDT 2017 Jesper Dangaard Brouer <brouer@redhat.com> 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 <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|