go.mod: github.com/opencontainers/runc v1.1.0

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

vendor/github.com/cilium/ebpf/internal/btf/info.go

@@ -0,0 +1,48 @@
+package btf
+
+import (
+	"bytes"
+
+	"github.com/cilium/ebpf/internal"
+)
+
+// info describes a BTF object.
+type info struct {
+	BTF *Spec
+	ID  ID
+	// Name is an identifying name for the BTF, currently only used by the
+	// kernel.
+	Name string
+	// KernelBTF is true if the BTf originated with the kernel and not
+	// userspace.
+	KernelBTF bool
+}
+
+func newInfoFromFd(fd *internal.FD) (*info, error) {
+	// We invoke the syscall once with a empty BTF and name buffers to get size
+	// information to allocate buffers. Then we invoke it a second time with
+	// buffers to receive the data.
+	bpfInfo, err := bpfGetBTFInfoByFD(fd, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	btfBuffer := make([]byte, bpfInfo.btfSize)
+	nameBuffer := make([]byte, bpfInfo.nameLen)
+	bpfInfo, err = bpfGetBTFInfoByFD(fd, btfBuffer, nameBuffer)
+	if err != nil {
+		return nil, err
+	}
+
+	spec, err := loadRawSpec(bytes.NewReader(btfBuffer), internal.NativeEndian, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return &info{
+		BTF:       spec,
+		ID:        ID(bpfInfo.id),
+		Name:      internal.CString(nameBuffer),
+		KernelBTF: bpfInfo.kernelBTF != 0,
+	}, nil
+}