Sorry for sending a wrong patch set! On Mon, 2022-08-29 at 12:20 -0700, Kui-Feng Lee wrote: > Allow users to attach a 64-bits cookie to a bpf_link of fentry, > fexit, > or fmod_ret. > > This patchset includes several major changes. > > - Define struct bpf_tramp_links to replace bpf_tramp_prog. > struct bpf_tramp_links collects bpf_links of a trampoline > > - Generate a trampoline to call bpf_progs of given bpf_links. > > - Trampolines always set/reset bpf_run_ctx before/after > calling/leaving a tracing program. > > - Attach a cookie to a bpf_link of fentry/fexit/fmod_ret/lsm. The > value will be available when running the associated bpf_prog. > > Th major differences from v6: > > - bpf_link_create() can create links of BPF_LSM_MAC attach type. > > - Add a test for lsm. > > - Add function proto of bpf_get_attach_cookie() for lsm. > > - Check BPF_LSM_MAC in bpf_prog_has_trampoline(). > > - Adapt to the changes of LINK_CREATE made by Andrii. > > The major differences from v7: > > - Change stack_size instead of pushing/popping run_ctx. > > - Move cookie to bpf_tramp_link from bpf_tracing_link.. > > v1: > https://lore.kernel.org/all/20220126214809.3868787-1-kuifeng@xxxxxx/ > v2: > https://lore.kernel.org/bpf/20220316004231.1103318-1-kuifeng@xxxxxx/ > v3: > https://lore.kernel.org/bpf/20220407192552.2343076-1-kuifeng@xxxxxx/ > v4: > https://lore.kernel.org/bpf/20220411173429.4139609-1-kuifeng@xxxxxx/ > v5: > https://lore.kernel.org/bpf/20220412165555.4146407-1-kuifeng@xxxxxx/ > v6: > https://lore.kernel.org/bpf/20220416042940.656344-1-kuifeng@xxxxxx/ > v7: > https://lore.kernel.org/bpf/20220508032117.2783209-1-kuifeng@xxxxxx/ > > Kui-Feng Lee (5): > bpf, x86: Generate trampolines from bpf_tramp_links > bpf, x86: Create bpf_tramp_run_ctx on the caller thread's stack > bpf, x86: Attach a cookie to fentry/fexit/fmod_ret/lsm. > libbpf: Assign cookies to links in libbpf. > selftest/bpf: The test cses of BPF cookie for > fentry/fexit/fmod_ret/lsm. > > arch/x86/net/bpf_jit_comp.c | 76 ++++++++----- > include/linux/bpf.h | 54 +++++++--- > include/linux/bpf_types.h | 1 + > include/uapi/linux/bpf.h | 10 ++ > kernel/bpf/bpf_lsm.c | 17 +++ > kernel/bpf/bpf_struct_ops.c | 71 +++++++++---- > kernel/bpf/syscall.c | 42 ++++---- > kernel/bpf/trampoline.c | 100 +++++++++++----- > -- > kernel/trace/bpf_trace.c | 17 +++ > net/bpf/bpf_dummy_struct_ops.c | 24 ++++- > tools/bpf/bpftool/link.c | 1 + > tools/include/uapi/linux/bpf.h | 10 ++ > tools/lib/bpf/bpf.c | 8 ++ > tools/lib/bpf/bpf.h | 3 + > tools/lib/bpf/libbpf.c | 19 +++- > tools/lib/bpf/libbpf.h | 12 +++ > tools/lib/bpf/libbpf.map | 1 + > .../selftests/bpf/prog_tests/bpf_cookie.c | 89 ++++++++++++++++ > .../selftests/bpf/progs/test_bpf_cookie.c | 52 +++++++-- > 19 files changed, 469 insertions(+), 138 deletions(-) >
