1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #include <sys/socket.h> 4 #include <bpf/bpf_helpers.h> 5 6 int get_set_sk_priority(void *ctx) 7 { 8 int prio; 9 10 /* Verify that context allows calling bpf_getsockopt and 11 * bpf_setsockopt by reading and writing back socket 12 * priority. 13 */ 14 15 if (bpf_getsockopt(ctx, SOL_SOCKET, SO_PRIORITY, &prio, sizeof(prio))) 16 return 0; 17 if (bpf_setsockopt(ctx, SOL_SOCKET, SO_PRIORITY, &prio, sizeof(prio))) 18 return 0; 19 20 return 1; 21 } 22