diff options
Diffstat (limited to 'samples/bpf/tracex1.bpf.c')
| -rw-r--r-- | samples/bpf/tracex1.bpf.c | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/samples/bpf/tracex1.bpf.c b/samples/bpf/tracex1.bpf.c index f3be14a03964..0ab39d76ff8f 100644 --- a/samples/bpf/tracex1.bpf.c +++ b/samples/bpf/tracex1.bpf.c @@ -8,15 +8,9 @@ #include "net_shared.h" #include <linux/version.h> #include <bpf/bpf_helpers.h> +#include <bpf/bpf_core_read.h> #include <bpf/bpf_tracing.h> -#define _(P) \ - ({ \ - typeof(P) val = 0; \ - bpf_probe_read_kernel(&val, sizeof(val), &(P)); \ - val; \ - }) - /* kprobe is NOT a stable ABI * kernel functions can be removed, renamed or completely change semantics. * Number of arguments and their positions can change, etc. @@ -34,12 +28,11 @@ int bpf_prog1(struct pt_regs *ctx) struct sk_buff *skb; int len; - /* non-portable! works for the given kernel only */ - bpf_probe_read_kernel(&skb, sizeof(skb), (void *)PT_REGS_PARM1(ctx)); - dev = _(skb->dev); - len = _(skb->len); + bpf_core_read(&skb, sizeof(skb), (void *)PT_REGS_PARM1(ctx)); + dev = BPF_CORE_READ(skb, dev); + len = BPF_CORE_READ(skb, len); - bpf_probe_read_kernel(devname, sizeof(devname), dev->name); + BPF_CORE_READ_STR_INTO(&devname, dev, name); if (devname[0] == 'l' && devname[1] == 'o') { char fmt[] = "skb %p len %d\n"; |