Wrap SYS_BPF errors, user-provided uprobe offsets, support new map, program and flag types

Breaking changes

• None

Features

• Return friendly error when creating maps with BPF_F_MMAPABLE or BPF_F_INNER_MAP and the kernel doesn't support them.
• Add support for StructOps, RingBuf, InodeStorage and TaskStorage map types.
• Support many new BPF program types added over the course of 2019/2020 in the assembler.
• Detect fentry, fmod_ret and fexit programs by their ELF section names.
• link: support user-provided offsets for uprobe locations by specifying UprobeOptions.
• link: support creating bpf_map_elem iterators
• Wrap and propagate all errors generated by SYS_BPF, allowing the caller to retrieve

Bug Fixes

• Fix flaky TestMapPin test on Go 1.17beta1

Deprecations

• ebpf.ErrNotExist is now an alias to os.ErrNotExist and will be removed in a future release.

Examples

• Docstring fixup in kprobe example

Contributors

Chris Tarazi
Lorenz Bauer
Mattia Meleleo
Mikko Ylinen
Robin Gögge
Tobias Klauser

Thank you for your work!