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selftests: bpf: Fix bind on used port

Felix Maurer requested to merge fmaurer-rh/centos-stream-9:bz2043528 into main

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2043528 Tested: selftest passes while port 111 is already in use Upstream Status: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git

commit 8c0be0631d81e48f77d0ebf0534c86e32bef5f89 Author: Felix Maurer fmaurer@redhat.com Date: Tue Jan 18 16:11:56 2022 +0100

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: 8259fdeb30326 ("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

Signed-off-by: Felix Maurer fmaurer@redhat.com

Edited by Felix Maurer

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