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