qemu/tools/ebpf, branch master

ebpf: Add a separate target for skeleton

2024-06-04T07:14:26Z

This generalizes the rule to generate the skeleton and allows to add another. Signed-off-by: Akihiko Odaki Signed-off-by: Jason Wang

ebpf: Refactor tun_rss_steering_prog()

2024-06-04T07:14:26Z

This saves branches and makes later BPF program changes easier. Signed-off-by: Akihiko Odaki Signed-off-by: Jason Wang

ebpf: Return 0 when configuration fails

2024-06-04T07:14:26Z

The kernel interprets the returned value as an unsigned 32-bit so -1 will mean queue 4294967295, which is awkward. Return 0 instead. Signed-off-by: Akihiko Odaki Signed-off-by: Jason Wang

ebpf: Fix RSS error handling

2024-06-04T07:14:26Z

calculate_rss_hash() was using hash value 0 to tell if it calculated a hash, but the hash value may be 0 on a rare occasion. Have a distinct bool value for correctness. Fixes: f3fa412de2 ("ebpf: Added eBPF RSS program.") Signed-off-by: Akihiko Odaki Signed-off-by: Jason Wang

ebpf: Updated eBPF program and skeleton.

2024-03-12T11:31:47Z

Updated section name, so libbpf should init/gues proper program type without specifications during open/load. Also, added map_flags with explicitly declared BPF_F_MMAPABLE. Added check for BPF_F_MMAPABLE flag to meson script and requirements to libbpf version. Also changed fragmentation flag check - some TCP/UDP packets may be considered fragmented if DF flag is set. Signed-off-by: Andrew Melnychenko Signed-off-by: Jason Wang

ebpf: fix compatibility with libbpf 1.0+

2023-03-10T09:26:47Z

The current implementation fails to load on a system with libbpf 1.0 and reports that legacy map definitions in 'maps' section are not supported by libbpf v1.0+. This commit updates the Makefile to add BTF (-g flag) and appropriately updates the maps in rss.bpf.c and update the skeleton file in repo. Signed-off-by: Shreesh Adiga <16567adigashreesh@gmail.com> Signed-off-by: Jason Wang

ebpf: Added eBPF RSS program.

2021-06-04T07:25:46Z

RSS program and Makefile to build it. The bpftool used to generate '.h' file. The data in that file may be loaded by libbpf. EBPF compilation is not required for building qemu. You can use Makefile if you need to regenerate rss.bpf.skeleton.h. Signed-off-by: Yuri Benditovich Signed-off-by: Andrew Melnychenko Signed-off-by: Jason Wang