Add bpf_map__set_autocreate() API which is a BPF map counterpart of
bpf_program__set_autoload() and serves similar goal of allowing to build more
flexible CO-RE applications. See patch #3 for example scenarios in which the
need for such API came up previously.
Patch #1 is a follow-up patch to previous patch set adding verifier log fixup
logic, making sure bpf_core_format_spec()'s return result is used for
something useful.
Patch #2 is a small refactoring to avoid unnecessary verbose memory management
around obj->maps array.
Patch #3 adds and API and corresponding BPF verifier log fix up logic to
provide human-comprehensible error message with useful details.
Patch #4 adds a simple selftest validating both the API itself and libbpf's
log fixup logic for it.
Andrii Nakryiko (4):
libbpf: append "..." in fixed up log if CO-RE spec is truncated
libbpf: use libbpf_mem_ensure() when allocating new map
libbpf: allow to opt-out from creating BPF maps
selftests/bpf: test bpf_map__set_autocreate() and related log fixup
logic
tools/lib/bpf/libbpf.c | 169 +++++++++++++-----
tools/lib/bpf/libbpf.h | 22 +++
tools/lib/bpf/libbpf.map | 4 +-
.../selftests/bpf/prog_tests/log_fixup.c | 37 +++-
.../selftests/bpf/progs/test_log_fixup.c | 26 +++
5 files changed, 209 insertions(+), 49 deletions(-)
--
2.30.2
