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- #define _GNU_SOURCE
- #include <stdio.h>
- #include <unistd.h>
- #include <bpf/libbpf.h>
- int main(int argc, char **argv)
- {
- struct bpf_link *link = NULL;
- struct bpf_program *prog;
- struct bpf_object *obj;
- char filename[256];
- char command[256];
- int ret = 0;
- FILE *f;
- if (!argv[1]) {
- fprintf(stderr, "ERROR: Run with the btrfs device argument!\n");
- return 0;
- }
- snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
- obj = bpf_object__open_file(filename, NULL);
- if (libbpf_get_error(obj)) {
- fprintf(stderr, "ERROR: opening BPF object file failed\n");
- return 0;
- }
- prog = bpf_object__find_program_by_name(obj, "bpf_prog1");
- if (!prog) {
- fprintf(stderr, "ERROR: finding a prog in obj file failed\n");
- goto cleanup;
- }
- /* load BPF program */
- if (bpf_object__load(obj)) {
- fprintf(stderr, "ERROR: loading BPF object file failed\n");
- goto cleanup;
- }
- link = bpf_program__attach(prog);
- if (libbpf_get_error(link)) {
- fprintf(stderr, "ERROR: bpf_program__attach failed\n");
- link = NULL;
- goto cleanup;
- }
- snprintf(command, 256, "mount %s tmpmnt/", argv[1]);
- f = popen(command, "r");
- ret = pclose(f);
- cleanup:
- bpf_link__destroy(link);
- bpf_object__close(obj);
- return ret ? 0 : 1;
- }
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