kernel/linux.git/samples/bpf/xdp_sample.bpf.c, branch linux-6.5.yLinux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=linux-6.5.y2021-08-24T21:48:41+00:00samples: bpf: Add BPF support for devmap_xmit tracepoint2021-08-24T21:48:41+00:00Kumar Kartikeya Dwivedimemxor@gmail.com2021-08-21T00:19:58+00:00urn:sha1:5f116212f4018fc9aa7a2a828b27aab540b8e5fa
This adds support for the devmap_xmit tracepoint, and its multi device
variant that can be used to obtain streams for each individual
net_device to net_device redirection. This is useful for decomposing
total xmit stats in xdp_monitor.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210821002010.845777-11-memxor@gmail.com
samples: bpf: Add BPF support for cpumap tracepoints2021-08-24T21:48:41+00:00Kumar Kartikeya Dwivedimemxor@gmail.com2021-08-21T00:19:56+00:00urn:sha1:0cf3c2fc4b1afbd8d9c376754af34c1d2bd56de7
These are invoked in two places, when the XDP frame or SKB (for generic
XDP) enqueued to the ptr_ring (cpumap_enqueue) and when kthread processes
the frame after invoking the CPUMAP program for it (returning stats for
the batch).
We use cpumap_map_id to filter on the map_id as a way to avoid printing
incorrect stats for parallel sessions of xdp_redirect_cpu.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210821002010.845777-9-memxor@gmail.com
samples: bpf: Add BPF support for xdp_exception tracepoint2021-08-24T21:48:40+00:00Kumar Kartikeya Dwivedimemxor@gmail.com2021-08-21T00:19:54+00:00urn:sha1:451588764e2f3e3ab197b23c7958f750707e2a24
This would allow us to store stats for each XDP action, including their
per-CPU counts. Consolidating this here allows all redirect samples to
detect xdp_exception events.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210821002010.845777-7-memxor@gmail.com
samples: bpf: Add BPF support for redirect tracepoint2021-08-24T21:48:40+00:00Kumar Kartikeya Dwivedimemxor@gmail.com2021-08-21T00:19:52+00:00urn:sha1:323140389405e5d5d2020b2e3e04863d12cf3e32
This adds the shared BPF file that will be used going forward for
sharing tracepoint programs among XDP redirect samples.
Since vmlinux.h conflicts with tools/include for READ_ONCE/WRITE_ONCE
and ARRAY_SIZE, they are copied in to xdp_sample.bpf.h along with other
helpers that will be required.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210821002010.845777-5-memxor@gmail.com