[PATCH bpf-next] bpf: Allow bpf_d_path in perf_event_mmap

[Florent Revest]

Allow the helper to be called from the perf_event_mmap hook. This is
convenient to lookup vma->vm_file and implement a similar logic as
perf_event_mmap_event in BPF.

Signed-off-by: Florent Revest <revest@xxxxxxxxxxxx>
---
 kernel/trace/bpf_trace.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index cbcd0d6fca7c..f6e301c775a5 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -922,6 +922,9 @@ BTF_ID(func, vfs_fallocate)
 BTF_ID(func, dentry_open)
 BTF_ID(func, vfs_getattr)
 BTF_ID(func, filp_close)
+#ifdef CONFIG_PERF_EVENTS
+BTF_ID(func, perf_event_mmap)
+#endif
 BTF_SET_END(btf_allowlist_d_path)
 
 static bool bpf_d_path_allowed(const struct bpf_prog *prog)
-- 
2.33.0.1079.g6e70778dc9-goog