- update to 1.2.0:
* completely overhauled "Libbpf overview" landing documentation
page;
* support for BPF link-based `struct_ops` programs:
* `SEC(".struct_ops.link")` annotations;
* `bpf_map__attach_struct_ops()` attach API;
* `bpf_link__update_map()` link update API;
* support sleepable `SEC("struct_ops.s")` programs
* improved thread-safety of libbpf print callbacks and
`libbpf_set_print()`
* improve handling and reporting of missing BPF kfuncs
* `bpf_{btf,link,map,prog}_get_info_by_fd()` APIs
* `bpf_xdp_query_opts()` supports fetching XDP/XSK supported
features;
* `perf_buffer__new()` allows customizing notification/sampling
period now;
* BPF verifier logging improvements:
* pass-through BPF verifier log level and flags to kernel as
is
* support `log_true_size` for getting required log buffer size
to fit BPF verifier log completely;
* allow precise control over kprobe/uprobe attach mode: legacy,
perf-based, link-based.
* fix legacy kprobe events names sanitization;
* fix clobbering errno in some cases;
* fix BPF map's `BPF_F_MMAPABLE` flag sanitization;
* fix BPF-side USDT support code on s390x architecture;
* fix `BPF_PROBE_READ{_STR}_INTO()` on s390x architecture;
* fix kernel version setting for Debian kernels;
* fix netlink protocol handling in some cases;