bpf: add fsession support

The fsession is something that similar to kprobe session. It allow to attach a single BPF program to both the entry and the exit of the target functions. Introduce the struct bpf_fsession_link, which allows to add the link to both the fentry and fexit progs_hlist of the trampoline. Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn> Co-developed-by: Leon Hwang <leon.hwang@linux.dev> Signed-off-by: Leon Hwang <leon.hwang@linux.dev> Link: https://lore.kernel.org/r/20260124062008.8657-2-dongml2@chinatelecom.cn Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2026-10-20 19:23:40 +00:00 · 2026-01-24 14:19:56 +08:00 · 2026-01-24 14:19:56 +08:00 · 2d419c4465
commit 2d419c4465
parent c7900f225a
10 changed files with 97 additions and 13 deletions
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
--- a/kernel/bpf/trampoline.c
+++ b/kernel/bpf/trampoline.c
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
--- a/net/bpf/test_run.c
+++ b/net/bpf/test_run.c
--- a/net/core/bpf_sk_storage.c
+++ b/net/core/bpf_sk_storage.c
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
--- a/tools/testing/selftests/bpf/prog_tests/tracing_failure.c
+++ b/tools/testing/selftests/bpf/prog_tests/tracing_failure.c