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authorMaxime Ripard <mripard@kernel.org>2025-02-06 09:59:35 +0100
committerMaxime Ripard <mripard@kernel.org>2025-02-06 09:59:35 +0100
commit2c1ed907520c50326b8f604907a8478b27881a2e (patch)
tree98eca0295007ae5a9e28e2ac3f532e185e2802eb /tools/testing/selftests/bpf/progs/changes_pkt_data.c
parent41a2d8286c905614f29007f1bc8e652d54654b82 (diff)
parentecee4d0695067ae04959b121028b42a588e75370 (diff)
Merge remote-tracking branch 'drm-misc/drm-misc-next-fixes' into drm-misc-fixes
Merge the few remaining patches stuck into drm-misc-next-fixes. Signed-off-by: Maxime Ripard <mripard@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/progs/changes_pkt_data.c')
-rw-r--r--tools/testing/selftests/bpf/progs/changes_pkt_data.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/changes_pkt_data.c b/tools/testing/selftests/bpf/progs/changes_pkt_data.c
new file mode 100644
index 000000000000..43cada48b28a
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/changes_pkt_data.c
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+
+__noinline
+long changes_pkt_data(struct __sk_buff *sk)
+{
+ return bpf_skb_pull_data(sk, 0);
+}
+
+__noinline __weak
+long does_not_change_pkt_data(struct __sk_buff *sk)
+{
+ return 0;
+}
+
+SEC("?tc")
+int main_with_subprogs(struct __sk_buff *sk)
+{
+ changes_pkt_data(sk);
+ does_not_change_pkt_data(sk);
+ return 0;
+}
+
+SEC("?tc")
+int main_changes(struct __sk_buff *sk)
+{
+ bpf_skb_pull_data(sk, 0);
+ return 0;
+}
+
+SEC("?tc")
+int main_does_not_change(struct __sk_buff *sk)
+{
+ return 0;
+}
+
+char _license[] SEC("license") = "GPL";