Re: [PATCH bpf-next v8 0/5] Attach a cookie to a tracing program. IGNORE!!

[Kui-Feng Lee <kuifeng@fb.com>]

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@fb.com/
> v2:
> https://lore.kernel.org/bpf/20220316004231.1103318-1-kuifeng@fb.com/
> v3:
> https://lore.kernel.org/bpf/20220407192552.2343076-1-kuifeng@fb.com/
> v4:
> https://lore.kernel.org/bpf/20220411173429.4139609-1-kuifeng@fb.com/
> v5:
> https://lore.kernel.org/bpf/20220412165555.4146407-1-kuifeng@fb.com/
> v6:
> https://lore.kernel.org/bpf/20220416042940.656344-1-kuifeng@fb.com/
> v7:
> https://lore.kernel.org/bpf/20220508032117.2783209-1-kuifeng@fb.com/
> 
> 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(-)
>