Documentation/bpf/redirect.rst

1 .. SPDX-License-Identifier: GPL-2.0-only
10 --------------
14 - ``BPF_MAP_TYPE_DEVMAP``
15 - ``BPF_MAP_TYPE_DEVMAP_HASH``
16 - ``BPF_MAP_TYPE_CPUMAP``
17 - ``BPF_MAP_TYPE_XSKMAP``
22 -------
24 .. kernel-doc:: net/core/filter.c
29     those that do, not all of them support non-linear frames. Non-linear xdp
33 ----------------------
36 - bpf_trace
37 - perf_record
43 .. code-block:: none
45     sudo bpftrace -e 'tracepoint:xdp:* { @cnt[probe] = count(); }'
61 .. code-block:: none
63     sudo bpftrace -e \
64     'tracepoint:xdp:xdp_redirect*_err {@redir_errno[-args->err] = count();}
65     tracepoint:xdp:xdp_devmap_xmit {@devmap_errno[-args->err] = count();}'
71 .. code-block:: none
73     perf record -a -e xdp:xdp_redirect_err \
74         -e xdp:xdp_redirect_map_err \
75         -e xdp:xdp_exception \
76         -e xdp:xdp_devmap_xmit
81 - https://github.com/xdp-project/xdp-tutorial/tree/master/tracing02-xdp-monitor