This series of patches provides the ability to retrieve eBPF program through qmp, so management application may load bpf blob with proper capabilities. Now, virtio-net devices can accept eBPF programs and maps through properties as external file descriptors. Access to the eBPF map is direct through mmap() call, so it should not require additional capabilities to bpf* calls. eBPF file descriptors can be passed to QEMU from parent process or by unix socket with sendfd() qmp command.
Changes since v8: * rebased and refactored QMP interface * license SPDX id only for new files Changes since v7: * rebased and refactored * used SPDX license identifier * used DEFINE_PROP_ARRAY() for virtio-net "ebpf-rss-fds" property Changes since v6: * added comments to ebpf.json * added libbpf version requirements to meson script with BPF_F_MMAPABLE check Changes since v5: * refactored ebpf.json Changes since v4: * refactored commit hunks * added explicit BPF_F_MMAPABLE declaration Changes since v3: * fixed issue with the build if bpf disabled * rebased to the last master * refactored according to review Changes since v2: * moved/refactored QMP command * refactored virtio-net Changes since v1: * refactored virtio-net * moved hunks for ebpf mmap() * added qmp enum for eBPF id. Andrew Melnychenko (5): ebpf: Added eBPF map update through mmap. ebpf: Added eBPF initialization by fds. virtio-net: Added property to load eBPF RSS with fds. qmp: Added new command to retrieve eBPF blob. ebpf: Updated eBPF program and skeleton. ebpf/ebpf.c | 69 ++ ebpf/ebpf.h | 29 + ebpf/ebpf_rss-stub.c | 6 + ebpf/ebpf_rss.c | 150 +++- ebpf/ebpf_rss.h | 10 + ebpf/meson.build | 2 +- ebpf/rss.bpf.skeleton.h | 1343 ++++++++++++++++---------------- hw/net/virtio-net.c | 54 +- include/hw/virtio/virtio-net.h | 2 + meson.build | 10 +- qapi/ebpf.json | 66 ++ qapi/meson.build | 1 + qapi/qapi-schema.json | 1 + tools/ebpf/rss.bpf.c | 7 +- 14 files changed, 1047 insertions(+), 703 deletions(-) create mode 100644 ebpf/ebpf.c create mode 100644 ebpf/ebpf.h create mode 100644 qapi/ebpf.json -- 2.43.0
