Changes v2 -> v3: 1. Added helper function bpf_compute_and_save_data_pointers() and bpf_restore_data_pointers().
Changes v1 -> v2: 1. Updated the list of read-only fields, and read-write fields. 2. Added dummy sk to bpf_prog_test_run_skb(). This set enables BPF program of type BPF_PROG_TYPE_CGROUP_SKB to access some __skb_buff data directly. Song Liu (2): bpf: add cg_skb_is_valid_access for BPF_PROG_TYPE_CGROUP_SKB bpf: add tests for direct packet access from CGROUP_SKB include/linux/filter.h | 24 +++ kernel/bpf/cgroup.c | 6 + net/bpf/test_run.c | 4 + net/core/filter.c | 36 ++++- tools/testing/selftests/bpf/test_verifier.c | 170 ++++++++++++++++++++ 5 files changed, 239 insertions(+), 1 deletion(-) -- 2.17.1
