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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
This commit is contained in:
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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2
scripts/bpf_helpers_doc.py
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@ -425,6 +425,7 @@ class PrinterHelpers(Printer):
'struct tcp_sock',
'struct tcp_timewait_sock',
'struct tcp_request_sock',
'struct udp6_sock',
'struct __sk_buff',
'struct sk_msg_md',
@ -466,6 +467,7 @@ class PrinterHelpers(Printer):
'struct tcp_sock',
'struct tcp_timewait_sock',
'struct tcp_request_sock',
'struct udp6_sock',
}
mapped_types = {
'u8': '__u8',