runsc: allow readv for direct TAP links - #14452
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August 27, 2026 16:30
Allow the sentry to use readv when an fdbased endpoint receives a non-socket file descriptor such as a TAP or TUN device. The dispatcher already selects readv for these supported descriptors, but the common seccomp policy previously terminated the sentry on its first packet. This keeps the seccomp policy aligned with the existing fdbased receive path used by direct TAP links. FUTURE_COPYBARA_INTEGRATE_REVIEW=#14232 from tianyuzhou95:albert/readv-seccomp bb9b1dd PiperOrigin-RevId: 971992510
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runsc: allow readv for direct TAP links
Allow the sentry to use readv when an fdbased endpoint receives a non-socket file descriptor such as a TAP or TUN device. The dispatcher already selects readv for these supported descriptors, but the common seccomp policy previously terminated the sentry on its first packet.
This keeps the seccomp policy aligned with the existing fdbased receive path used by direct TAP links.
FUTURE_COPYBARA_INTEGRATE_REVIEW=#14232 from tianyuzhou95:albert/readv-seccomp bb9b1dd