bpf: Add bpf_skc_to_udp6_sock() helper

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The helper is used in tracing programs to cast a socket
pointer to a udp6_sock pointer.
The return value could be NULL if the casting is illegal.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Cc: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/bpf/20200623230815.3988481-1-yhs@fb.com

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Yonghong Song 2020-06-23 16:08:15 -07:00 • committed by Alexei Starovoitov

parent 5788b3a07f

commit 0d4fad3e57

6 changed files with 43 additions and 2 deletions

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1

include/linux/bpf.h

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9

include/uapi/linux/bpf.h

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2

kernel/trace/bpf_trace.c

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22

net/core/filter.c

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2

scripts/bpf_helpers_doc.py

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9

tools/include/uapi/linux/bpf.h

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