Commit 55bad79e authored by Benjamin Tissoires's avatar Benjamin Tissoires Committed by Alexei Starovoitov
Browse files

bpf: allow more maps in sleepable bpf programs 



These 2 maps types are required for HID-BPF when a user wants to do
IO with a device from a sleepable tracing point.

Allowing BPF_MAP_TYPE_QUEUE (and therefore BPF_MAP_TYPE_STACK) allows
for a BPF program to prepare from an IRQ the list of HID commands to send
back to the device and then these commands can be retrieved from the
sleepable trace point.

Signed-off-by: default avatarBenjamin Tissoires <bentiss@kernel.org>
Link: https://lore.kernel.org/r/20240221-hid-bpf-sleepable-v3-1-1fb378ca6301@kernel.org


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 63c7049e

kernel/bpf/verifier.c

+2 −0
Original line number Diff line number Diff line
@@ -18022,6 +18022,8 @@ static int check_map_prog_compatibility(struct bpf_verifier_env *env, 
		case BPF_MAP_TYPE_SK_STORAGE:

		case BPF_MAP_TYPE_TASK_STORAGE:

		case BPF_MAP_TYPE_CGRP_STORAGE:

		case BPF_MAP_TYPE_QUEUE:

		case BPF_MAP_TYPE_STACK:

			break;

		default:

			verbose(env,