selftests/namespaces: first active reference count tests

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Test that initial namespaces can be reopened via file handle. Initial
namespaces should always have a ref count of one from boot.

Link: https://patch.msgid.link/20251029-work-namespace-nstree-listns-v4-23-2e6f823ebdc0@kernel.org
Tested-by: syzbot@syzkaller.appspotmail.com
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>

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Christian Brauner 2025-10-29 13:20:36 +01:00

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tools/testing/selftests/namespaces/.gitignore vendored

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tools/testing/selftests/namespaces/Makefile

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74

tools/testing/selftests/namespaces/ns_active_ref_test.c

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