Re: [PATCH 2/2] samples/bpf: add a test for bpf_override_return
From: Alexei Starovoitov <hidden>
Date: 2017-10-31 01:37:33
Also in:
lkml
On 10/30/17 2:19 PM, Josef Bacik wrote:
+ +rm -f testfile.img +dd if=/dev/zero of=testfile.img bs=1M seek=1000 count=1 +DEVICE=$(losetup --show -f testfile.img) +mkfs.btrfs -f $DEVICE +mkdir tmpmnt +./tracex7 $DEVICE +if [ $? -eq 0 ] +then + echo "SUCCESS!" +else + echo "FAILED!" +fi +losetup -d $DEVICE
nice test!
quoted hunk ↗ jump to hunk
diff --git a/samples/bpf/tracex7_kern.c b/samples/bpf/tracex7_kern.c new file mode 100644 index 000000000000..a2f74f736e66 --- /dev/null +++ b/samples/bpf/tracex7_kern.c@@ -0,0 +1,15 @@ +#include <uapi/linux/ptrace.h> +#include <uapi/linux/bpf.h> +#include <linux/version.h> +#include "bpf_helpers.h" + +SEC("kprobe/open_ctree") +int bpf_prog1(struct pt_regs *ctx) +{ + unsigned long rc = -12;
pls add empty line here.
+ bpf_override_return(ctx, rc); + return 0; +}