add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/samples/bpf/tracex1_kern.c
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@@ -8,9 +8,15 @@
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 #include <linux/netdevice.h>
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 #include <uapi/linux/bpf.h>
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 #include <linux/version.h>
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-#include "bpf_helpers.h"
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+#include <bpf/bpf_helpers.h>
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+#include <bpf/bpf_tracing.h>
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-#define _(P) ({typeof(P) val = 0; bpf_probe_read(&val, sizeof(val), &P); val;})
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+#define _(P)                                                                   \
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+	({                                                                     \
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+		typeof(P) val = 0;                                             \
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+		bpf_probe_read_kernel(&val, sizeof(val), &(P));                \
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+		val;                                                           \
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+	})
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 /* kprobe is NOT a stable ABI
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  * kernel functions can be removed, renamed or completely change semantics.
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@@ -33,7 +39,7 @@
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 	dev = _(skb->dev);
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 	len = _(skb->len);
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-	bpf_probe_read(devname, sizeof(devname), dev->name);
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+	bpf_probe_read_kernel(devname, sizeof(devname), dev->name);
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 	if (devname[0] == 'l' && devname[1] == 'o') {
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 		char fmt[] = "skb %p len %d\n";