At runtime, bpftool may run its own BPF programs to get the pids of processes referencing BPF programs, or to profile programs. The skeletons for these programs rely on a vmlinux.h header and may fail to compile when building bpftool on hosts running older kernels, where some structs or enums are not defined. In this set, we address this issue by using local definitions for struct perf_event, struct bpf_perf_link, BPF_LINK_TYPE_PERF_EVENT (pids.bpf.c) and struct bpf_perf_event_value (profiler.bpf.c). This set contains patches 1 to 3 from Alexander Lobakin's series, "bpf: random unpopular userspace fixes (32 bit et al)" (v2) [0], from April 2022. An additional patch defines a local version of BPF_LINK_TYPE_PERF_EVENT in bpftool's pids.bpf.c. [0] https://lore.kernel.org/bpf/20220421003152.339542-1-alobakin@xxxxx/ v2: Fixed description (CO-RE for container_of()) in patch 2. Cc: Alexander Lobakin <aleksander.lobakin@xxxxxxxxx> Cc: Michal Suchánek <msuchanek@xxxxxxx> Alexander Lobakin (3): bpftool: use a local copy of perf_event to fix accessing ::bpf_cookie bpftool: define a local bpf_perf_link to fix accessing its fields bpftool: use a local bpf_perf_event_value to fix accessing its fields Quentin Monnet (1): bpftool: Use a local copy of BPF_LINK_TYPE_PERF_EVENT in pid_iter.bpf.c tools/bpf/bpftool/skeleton/pid_iter.bpf.c | 26 +++++++++++++++++----- tools/bpf/bpftool/skeleton/profiler.bpf.c | 27 ++++++++++++++--------- 2 files changed, 38 insertions(+), 15 deletions(-) -- 2.34.1
