samples/bpf: unify bpf program suffix to .bpf with tracing programs

Currently, BPF programs typically have a suffix of .bpf.c. However,
some programs still utilize a mixture of _kern.c suffix alongside the
naming convention. In order to achieve consistency in the naming of
these programs, this commit unifies the inconsistency in the naming
convention of BPF kernel programs.

Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Link: https://lore.kernel.org/r/20230818090119.477441-4-danieltimlee@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 0 insertions, 53 deletions

diff --git a/samples/bpf/tracex1_kern.c b/samples/bpf/tracex1_kern.c
deleted file mode 100644
index bb78bdbffa87..000000000000
--- a/samples/bpf/tracex1_kern.c
+++ /dev/null
@@ -1,53 +0,0 @@
-/* Copyright (c) 2013-2015 PLUMgrid, http://plumgrid.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- */
-#include "vmlinux.h"
-#include "net_shared.h"
-#include <linux/version.h>
-#include <bpf/bpf_helpers.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.
- * In such case this bpf+kprobe example will no longer be meaningful
- */
-SEC("kprobe/__netif_receive_skb_core")
-int bpf_prog1(struct pt_regs *ctx)
-{
-	/* attaches to kprobe __netif_receive_skb_core,
-	 * looks for packets on loobpack device and prints them
-	 */
-	char devname[IFNAMSIZ];
-	struct net_device *dev;
-	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_probe_read_kernel(devname, sizeof(devname), dev->name);
-
-	if (devname[0] == 'l' && devname[1] == 'o') {
-		char fmt[] = "skb %p len %d\n";
-		/* using bpf_trace_printk() for DEBUG ONLY */
-		bpf_trace_printk(fmt, sizeof(fmt), skb, len);
-	}
-
-	return 0;
-}
-
-char _license[] SEC("license") = "GPL";
-u32 _version SEC("version") = LINUX_VERSION_CODE;