Hello:
This series was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <ast@xxxxxxxxxx>:
On Wed, 31 Aug 2022 08:26:41 -0700 you wrote:
> Currently struct arguments are not supported for trampoline based progs.
> One of major reason is that struct argument may pass by value which may
> use more than one registers. This breaks trampoline progs where
> each argument is assumed to take one register. bcc community reported the
> issue ([1]) where struct argument is not supported for fentry program.
> typedef struct {
> uid_t val;
> } kuid_t;
> typedef struct {
> gid_t val;
> } kgid_t;
> int security_path_chown(struct path *path, kuid_t uid, kgid_t gid);
> Inside Meta, we also have a use case to attach to tcp_setsockopt()
> typedef struct {
> union {
> void *kernel;
> void __user *user;
> };
> bool is_kernel : 1;
> } sockptr_t;
> int tcp_setsockopt(struct sock *sk, int level, int optname,
> sockptr_t optval, unsigned int optlen);
>
> [...]
Here is the summary with links:
- [bpf-next,v4,1/8] bpf: Allow struct argument in trampoline based programs
https://git.kernel.org/bpf/bpf-next/c/720e6a435194
- [bpf-next,v4,2/8] bpf: x86: Support in-register struct arguments in trampoline programs
https://git.kernel.org/bpf/bpf-next/c/a9c5ad31fbdc
- [bpf-next,v4,3/8] bpf: Update descriptions for helpers bpf_get_func_arg[_cnt]()
https://git.kernel.org/bpf/bpf-next/c/27ed9353aec9
- [bpf-next,v4,4/8] bpf: arm64: No support of struct argument in trampoline programs
https://git.kernel.org/bpf/bpf-next/c/eb707dde264a
- [bpf-next,v4,5/8] libbpf: Add new BPF_PROG2 macro
https://git.kernel.org/bpf/bpf-next/c/34586d29f8df
- [bpf-next,v4,6/8] selftests/bpf: Add struct argument tests with fentry/fexit programs.
https://git.kernel.org/bpf/bpf-next/c/1642a3945e22
- [bpf-next,v4,7/8] selftests/bpf: Use BPF_PROG2 for some fentry programs without struct arguments
https://git.kernel.org/bpf/bpf-next/c/a7c2ca3a2f69
- [bpf-next,v4,8/8] selftests/bpf: Add tracing_struct test in DENYLIST.s390x
https://git.kernel.org/bpf/bpf-next/c/ae63c10fc241
You are awesome, thank you!
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