Patch 1: Add 'btf_custom_path' to 'bpf_obj_open_opts', allow developers to use custom btf to perform CO-RE relocation. Patch 2: Fixed the memory leak problem pointed out by Andrii. Changelog: ---------- v2: https://lore.kernel.org/bpf/CAEf4Bza_ua+tjxdhyy4nZ8Boeo+scipWmr_1xM1pC6N5wyuhAA@xxxxxxxxxxxxxx/T/#mf9cf86ae0ffa96180ac29e4fd12697eb70eccd0f v2->v3: --- Load the BTF specified by btf_custom_path to btf_vmlinux_override instead of btf_bmlinux. --- Fix the memory leak that may be introduced by the second version of the patch. --- Add a new patch to fix the possible memory leak caused by obj->kconfig. v1: https://lore.kernel.org/bpf/CAEf4BzaGjEC4t1OefDo11pj2-HfNy0BLhs_G2UREjRNTmb2u=A@xxxxxxxxxxxxxx/t/#m4d9f7c6761fbd2b436b5dfe491cd864b70225804 v1->v2: -- Change custom_btf_path to btf_custom_path. -- If the length of btf_custom_path of bpf_obj_open_opts is too long, return ERR_PTR(-ENAMETOOLONG). -- Add `custom BTF is in addition to vmlinux BTF` with btf_custom_path field. Shuyi Cheng (2): libbpf: Introduce 'btf_custom_path' to 'bpf_obj_open_opts' libbpf: Fix the possible memory leak caused by obj->kconfig tools/lib/bpf/libbpf.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++---- tools/lib/bpf/libbpf.h | 6 +++++- 2 files changed, 53 insertions(+), 5 deletions(-) -- 1.8.3.1
