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selftests/bpf: Add lwt_xmit tests for BPF_REDIRECT

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There is no lwt_xmit test case for BPF_REDIRECT yet. Add test cases for
both normal and abnormal situations. For abnormal test cases, devices
are set down or have its carrier set down. Without proper fixes,
BPF_REDIRECT to either ingress or egress of such device would panic the
kernel.

Signed-off-by: Yan Zhai <yan@cloudflare.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/96bf435243641939d9c9da329fab29cb45f7df22.1692326837.git.yan@cloudflare.com
This commit is contained in:
Yan Zhai
2023-08-17 19:58:16 -07:00
committed by Daniel Borkmann
parent a171fbec88
commit 43a7c3ef8a
4 changed files with 560 additions and 0 deletions
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1
tools/testing/selftests/bpf/config
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@@ -16,6 +16,7 @@ CONFIG_CRYPTO_USER_API_HASH=y
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_INFO_BTF=y
CONFIG_DEBUG_INFO_DWARF4=y
CONFIG_DUMMY=y
CONFIG_DYNAMIC_FTRACE=y
CONFIG_FPROBE=y
CONFIG_FTRACE_SYSCALLS=y