diff options
author | Josef Bacik <jbacik@fb.com> | 2017-11-07 15:28:43 -0500 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2017-11-11 12:18:06 +0900 |
commit | eafb3401faf243f7dca0e23325242cb8c2269ee9 (patch) | |
tree | d7dffdccd2bb46bd11e8fffef50c3690b244c64c /samples/bpf/tracex7_user.c | |
parent | dd0bb688eaa241b5655d396d45366cba9225aed9 (diff) |
samples/bpf: add a test for bpf_override_return
This adds a basic test for bpf_override_return to verify it works. We
override the main function for mounting a btrfs fs so it'll return
-ENOMEM and then make sure that trying to mount a btrfs fs will fail.
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples/bpf/tracex7_user.c')
-rw-r--r-- | samples/bpf/tracex7_user.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/samples/bpf/tracex7_user.c b/samples/bpf/tracex7_user.c new file mode 100644 index 000000000000..8a52ac492e8b --- /dev/null +++ b/samples/bpf/tracex7_user.c @@ -0,0 +1,28 @@ +#define _GNU_SOURCE + +#include <stdio.h> +#include <linux/bpf.h> +#include <unistd.h> +#include "libbpf.h" +#include "bpf_load.h" + +int main(int argc, char **argv) +{ + FILE *f; + char filename[256]; + char command[256]; + int ret; + + snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); + + if (load_bpf_file(filename)) { + printf("%s", bpf_log_buf); + return 1; + } + + snprintf(command, 256, "mount %s tmpmnt/", argv[1]); + f = popen(command, "r"); + ret = pclose(f); + + return ret ? 0 : 1; +} |