Messages in this thread | | | From | Hengqi Chen <> | Subject | [RFC PATCH 0/2] seccomp: Split set filter into two steps | Date | Tue, 3 Oct 2023 08:38:34 +0000 |
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This patchset introduces two new operations which essentially splits the SECCOMP_SET_MODE_FILTER process into two steps: SECCOMP_LOAD_FILTER and SECCOMP_ATTACH_FILTER.
The SECCOMP_LOAD_FILTER loads the filter and returns a fd which can be pinned to bpffs. This extends the lifetime of the filter and thus can be reused by different processes. With this new operation, we can eliminate a hot path of JITing BPF program (the filter) where we apply the same seccomp filter to thousands of micro VMs on a bare metal instance.
The SECCOMP_ATTACH_FILTER is used to attach a loaded filter. The filter is represented by a fd which is either returned from SECCOMP_LOAD_FILTER or obtained from bpffs using bpf syscall.
Hengqi Chen (2): seccomp: Introduce SECCOMP_LOAD_FILTER operation seccomp: Introduce SECCOMP_ATTACH_FILTER operation
include/uapi/linux/seccomp.h | 2 + kernel/seccomp.c | 138 ++++++++++++++++++++++++++++++++++- 2 files changed, 136 insertions(+), 4 deletions(-)
-- 2.34.1
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