Applications already have the ability to update a struct_ops link with another struct_ops map. However, they were unable to open pinned paths of the links. This implies that updating a link through its pinned paths was not feasible. By allowing the "open" operator on pinned paths, applications can pin a struct_ops link and update the link through the pinned path later. --- Changes from v1: - Fix a link time error for the case that CONFIG_BPF_JIT is not enabled. (Reported by kernel test robot) v1: https://lore.kernel.org/all/20240417002513.1534535-1-thinker.li@xxxxxxxxx/ Kui-Feng Lee (2): bpf: enable the "open" operator on a pinned path of a struct_osp link. selftests/bpf: open a pinned path of a struct_ops link. include/linux/bpf.h | 6 ++ kernel/bpf/bpf_struct_ops.c | 10 ++++ kernel/bpf/inode.c | 11 +++- kernel/bpf/syscall.c | 16 +++++- .../selftests/bpf/bpf_testmod/bpf_testmod.c | 6 ++ .../bpf/prog_tests/test_struct_ops_module.c | 56 +++++++++++++++++++ 6 files changed, 101 insertions(+), 4 deletions(-) -- 2.34.1
