1 files changed, 42 insertions, 0 deletions
diff --git a/vendor/github.com/cilium/ebpf/pinning.go b/vendor/github.com/cilium/ebpf/pinning.go
new file mode 100644
index 000000000..78812364a
--- /dev/null
+++ b/vendor/github.com/cilium/ebpf/pinning.go
@@ -0,0 +1,42 @@
+package ebpf
+
+import (
+	"errors"
+	"fmt"
+	"os"
+
+	"github.com/cilium/ebpf/internal"
+)
+
+func pin(currentPath, newPath string, fd *internal.FD) error {
+	if newPath == "" {
+		return errors.New("given pinning path cannot be empty")
+	}
+	if currentPath == "" {
+		return internal.BPFObjPin(newPath, fd)
+	}
+	if currentPath == newPath {
+		return nil
+	}
+	var err error
+	// Object is now moved to the new pinning path.
+	if err = os.Rename(currentPath, newPath); err == nil {
+		return nil
+	}
+	if !os.IsNotExist(err) {
+		return fmt.Errorf("unable to move pinned object to new path %v: %w", newPath, err)
+	}
+	// Internal state not in sync with the file system so let's fix it.
+	return internal.BPFObjPin(newPath, fd)
+}
+
+func unpin(pinnedPath string) error {
+	if pinnedPath == "" {
+		return nil
+	}
+	err := os.Remove(pinnedPath)
+	if err == nil || os.IsNotExist(err) {
+		return nil
+	}
+	return err
+}