Commit a50a85e4 authored Dec 04, 2020 by Florent Revest Committed by Daniel Borkmann Dec 04, 2020

bpf: Expose bpf_sk_storage_* to iterator programs



Iterators are currently used to expose kernel information to userspace
over fast procfs-like files but iterators could also be used to
manipulate local storage. For example, the task_file iterator could be
used to initialize a socket local storage with associations between
processes and sockets or to selectively delete local storage values.

Signed-off-by: Florent Revest <revest@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: KP Singh <kpsingh@google.com>
Link: https://lore.kernel.org/bpf/20201204113609.1850150-3-revest@google.com

parent 4f19cab7

net/core/bpf_sk_storage.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -394,6 +394,7 @@ static bool bpf_sk_storage_tracing_allowed(const struct bpf_prog *prog)
		* use the bpf_sk_storage_(get\|delete) helper.
		*/
		switch (prog->expected_attach_type) {
		case BPF_TRACE_ITER:
		case BPF_TRACE_RAW_TP:
		/* bpf_sk_storage has no trace point */
		return true;

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