net: bpf: hook for inet port bind conflict check #2341
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This hook of cgroup is called while TCP/UDP local port bind conflict check. This is different from the 'commit aac3fc3 ("bpf: Post-hooks for sys_bind")', as it is also called in autobind case. For TCP, this hook is called during sys_bind() and autobind. And it is also called during tcp_v4_connect() before hash the sock to ehash, during which src ip, src port, dst ip, and dst port is already allocated, means that we have a chance to determine whether this connect should continue. This can be useful when we want some applications not to use some port (include auto bind port). For autobind, the kernel has the chance to choose another port. Signed-off-by: Menglong Dong <imagedong@tencent.com>
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Master branch: 819d115 |
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=601827 expired. Closing PR. |
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Pull request for series with
subject: net: bpf: hook for inet port bind conflict check
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=601827