Currently, the AF_XDP code uses a separate map in order to determine if an xsk is bound to a queue. Have the xskmap lookup return a XDP_SOCK pointer on the kernel side, which the verifier uses to extract relevant values.
Patches: 1 - adds XSK_SOCK type 2 - sync bpf.h with tools 3 - add tools selftest 4 - update lib/bpf, removing qidconf v4->v5: - xskmap lookup now returns XDP_SOCK type instead of pointer to element. - no changes lib/bpf/xsk.c v3->v4: - Clarify error handling path. v2->v3: - Use correct map type. Jonathan Lemon (4): bpf: Allow bpf_map_lookup_elem() on an xskmap bpf/tools: sync bpf.h tools/bpf: Add bpf_map_lookup_elem selftest for xskmap libbpf: remove qidconf and better support external bpf programs. include/linux/bpf.h | 8 ++ include/net/xdp_sock.h | 4 +- include/uapi/linux/bpf.h | 4 + kernel/bpf/verifier.c | 26 ++++- kernel/bpf/xskmap.c | 7 ++ net/core/filter.c | 40 +++++++ tools/include/uapi/linux/bpf.h | 4 + tools/lib/bpf/xsk.c | 103 +++++------------- .../bpf/verifier/prevent_map_lookup.c | 15 --- tools/testing/selftests/bpf/verifier/sock.c | 18 +++ 10 files changed, 135 insertions(+), 94 deletions(-) -- 2.17.1
