This patchset is the 3rd in the dynptr series. The 1st (dynptr fundamentals) can be found here [0] and the second (skb + xdp dynptrs) can be found here [1]. This patchset adds the following convenience helpers for interacting with dynptrs: int bpf_dynptr_trim(struct bpf_dynptr *ptr, __u32 len) __ksym; int bpf_dynptr_advance(struct bpf_dynptr *ptr, __u32 len) __ksym; int bpf_dynptr_is_null(const struct bpf_dynptr *ptr) __ksym; int bpf_dynptr_is_rdonly(const struct bpf_dynptr *ptr) __ksym; __u32 bpf_dynptr_get_size(const struct bpf_dynptr *ptr) __ksym; __u32 bpf_dynptr_get_offset(const struct bpf_dynptr *ptr) __ksym; int bpf_dynptr_clone(const struct bpf_dynptr *ptr, struct bpf_dynptr *clone__init) __ksym; [0] https://lore.kernel.org/bpf/20220523210712.3641569-1-joannelkoong@xxxxxxxxx/ [1] https://lore.kernel.org/bpf/20230301154953.641654-1-joannelkoong@xxxxxxxxx/ Joanne Koong (5): bpf: Add bpf_dynptr_trim and bpf_dynptr_advance bpf: Add bpf_dynptr_is_null and bpf_dynptr_is_rdonly bpf: Add bpf_dynptr_get_size and bpf_dynptr_get_offset bpf: Add bpf_dynptr_clone selftests/bpf: add tests for dynptr convenience helpers include/linux/bpf.h | 2 +- kernel/bpf/helpers.c | 108 +++++- kernel/bpf/verifier.c | 125 ++++++- kernel/trace/bpf_trace.c | 4 +- tools/testing/selftests/bpf/bpf_kfuncs.h | 8 + .../testing/selftests/bpf/prog_tests/dynptr.c | 6 + .../testing/selftests/bpf/progs/dynptr_fail.c | 313 +++++++++++++++++ .../selftests/bpf/progs/dynptr_success.c | 320 ++++++++++++++++++ 8 files changed, 864 insertions(+), 22 deletions(-) -- 2.34.1
