/* eBPF example program: * * - Loads eBPF program * * The eBPF program sets the sk_bound_dev_if index in new AF_INET{6} * sockets opened by processes in the cgroup. * * - Attaches the new program to a cgroup using BPF_PROG_ATTACH */ #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include "libbpf.h" char bpf_log_buf[BPF_LOG_BUF_SIZE]; static int prog_load(int idx) { struct bpf_insn prog[] = { BPF_MOV64_REG(BPF_REG_6, BPF_REG_1), BPF_MOV64_IMM(BPF_REG_3, idx), BPF_MOV64_IMM(BPF_REG_2, offsetof(struct bpf_sock, bound_dev_if)), BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_3, offsetof(struct bpf_sock, bound_dev_if)), BPF_MOV64_IMM(BPF_REG_0, 1), /* r0 = verdict */ BPF_EXIT_INSN(), }; size_t insns_cnt = sizeof(prog) / sizeof(struct bpf_insn); return bpf_load_program(BPF_PROG_TYPE_CGROUP_SOCK, prog, insns_cnt, "GPL", 0, bpf_log_buf, BPF_LOG_BUF_SIZE); } static int usage(const char *argv0) { printf("Usage: %s cg-path device-index\n", argv0); return EXIT_FAILURE; } int main(int argc, char **argv) { int cg_fd, prog_fd, ret; unsigned int idx; if (argc < 2) return usage(argv[0]); idx = if_nametoindex(argv[2]); if (!idx) { printf("Invalid device name\n"); return EXIT_FAILURE; } cg_fd = open(argv[1], O_DIRECTORY | O_RDONLY); if (cg_fd < 0) { printf("Failed to open cgroup path: '%s'\n", strerror(errno)); return EXIT_FAILURE; } prog_fd = prog_load(idx); printf("Output from kernel verifier:\n%s\n-------\n", bpf_log_buf); if (prog_fd < 0) { printf("Failed to load prog: '%s'\n", strerror(errno)); return EXIT_FAILURE; } ret = bpf_prog_attach(prog_fd, cg_fd, BPF_CGROUP_INET_SOCK_CREATE); if (ret < 0) { printf("Failed to attach prog to cgroup: '%s'\n", strerror(errno)); return EXIT_FAILURE; } return EXIT_SUCCESS; } t-next.git/diff/sound/pci/ice1712?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>diff
path: root/sound/pci/ice1712
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