selftests: bpf: Fix bind on used port
The bind_perm BPF selftest failed when port 111/tcp was already in use during the test. To fix this, the test now runs in its own network name space. To use unshare, it is necessary to reorder the includes. The style of the includes is adapted to be consistent with the other prog_tests. v2: Replace deprecated CHECK macro with ASSERT_OK Fixes: 8259fdeb ("selftests/bpf: Verify that rebinding to port < 1024 from BPF works") Signed-off-by: Felix Maurer <fmaurer@redhat.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com> Link: https://lore.kernel.org/bpf/551ee65533bb987a43f93d88eaf2368b416ccd32.1642518457.git.fmaurer@redhat.com
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