Initial QSfera import

Server/vendor/github.com/ceph/go-ceph/rados/read_step.go

@@ -0,0 +1,31 @@
+package rados
+
+// #include <stdint.h>
+import "C"
+
+import (
+	"unsafe"
+)
+
+type readStep struct {
+	withoutUpdate
+	withoutFree
+	// the c pointer utilizes the Go byteslice data and no free is needed
+
+	// inputs:
+	b []byte
+
+	// arguments:
+	cBuffer  *C.char
+	cReadLen C.size_t
+	cOffset  C.uint64_t
+}
+
+func newReadStep(b []byte, offset uint64) *readStep {
+	return &readStep{
+		b:        b,
+		cBuffer:  (*C.char)(unsafe.Pointer(&b[0])), // TODO: must be pinned
+		cReadLen: C.size_t(len(b)),
+		cOffset:  C.uint64_t(offset),
+	}
+}