seccomp: Make seccomp filter reusable #5797
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This extracts two helpers for reuse in subsequent additions. No functional change intended, just a prep work. Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
This patch adds a new operation named SECCOMP_LOAD_FILTER. It accepts the same arguments as SECCOMP_SET_MODE_FILTER but only performs the loading process. If succeed, return a new fd associated with the JITed BPF program (the filter). The filter can then be pinned to bpffs using the returned fd and reused for different processes. To distinguish the filter from other BPF progs, BPF_PROG_TYPE_SECCOMP is added. Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
The SECCOMP_ATTACH_FILTER operation is used to attach a loaded filter to the current process. The loaded filter is represented by a fd which is either returned by the SECCOMP_LOAD_FILTER operation or obtained from bpffs using bpf syscall. Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Add a testcase to exercise the newly added SECCOMP_LOAD_FILTER and SECCOMP_ATTACH_FILTER operations. Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
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Upstream branch: 1ef09e1 |
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=791618 expired. Closing PR. |
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Pull request for series with
subject: seccomp: Make seccomp filter reusable
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=791618