rebase: update go-ceph to release v0.13.0

This commit update go-ceph to v0.13.0 and
change CEPH_VERSION in build.env to pacific.

Signed-off-by: Rakshith R <rar@redhat.com>

vendor/github.com/ceph/go-ceph/rados/omap.go

@@ -99,8 +99,8 @@ type GetOmapStep struct {
 
 	// C returned data:
 	iter C.rados_omap_iter_t
-	more C.uchar
-	rval C.int
+	more *C.uchar
+	rval *C.int
 
 	// internal state:
 
@@ -116,6 +116,8 @@ func newGetOmapStep(startAfter, filterPrefix string, maxReturn uint64) *GetOmapS
 		maxReturn:     maxReturn,
 		cStartAfter:   C.CString(startAfter),
 		cFilterPrefix: C.CString(filterPrefix),
+		more:          (*C.uchar)(C.malloc(C.sizeof_uchar)),
+		rval:          (*C.int)(C.malloc(C.sizeof_int)),
 	}
 	runtime.SetFinalizer(gos, opStepFinalizer)
 	return gos
@@ -127,8 +129,10 @@ func (gos *GetOmapStep) free() {
 		C.rados_omap_get_end(gos.iter)
 	}
 	gos.iter = nil
-	gos.more = 0
-	gos.rval = 0
+	C.free(unsafe.Pointer(gos.more))
+	gos.more = nil
+	C.free(unsafe.Pointer(gos.rval))
+	gos.rval = nil
 	C.free(unsafe.Pointer(gos.cStartAfter))
 	gos.cStartAfter = nil
 	C.free(unsafe.Pointer(gos.cFilterPrefix))
@@ -136,7 +140,7 @@ func (gos *GetOmapStep) free() {
 }
 
 func (gos *GetOmapStep) update() error {
-	err := getError(gos.rval)
+	err := getError(*gos.rval)
 	gos.canIterate = (err == nil)
 	return err
 }
@@ -168,7 +172,7 @@ func (gos *GetOmapStep) Next() (*OmapKeyValue, error) {
 func (gos *GetOmapStep) More() bool {
 	// tad bit hacky, but go can't automatically convert from
 	// unsigned char to bool
-	return gos.more != 0
+	return *gos.more != 0
 }
 
 // removeOmapKeysStep is a write operation step used to track state, especially

vendor/github.com/ceph/go-ceph/rados/read_op.go

@@ -77,8 +77,8 @@ func (r *ReadOp) GetOmapValues(startAfter, filterPrefix string, maxReturn uint64
 		gos.cFilterPrefix,
 		C.uint64_t(gos.maxReturn),
 		&gos.iter,
-		&gos.more,
-		&gos.rval,
+		gos.more,
+		gos.rval,
 	)
 	return gos
 }

vendor/github.com/ceph/go-ceph/rados/write_op_preview.go

@@ -0,0 +1,63 @@
+//go:build ceph_preview
+// +build ceph_preview
+
+package rados
+
+// #cgo LDFLAGS: -lrados
+// #include <rados/librados.h>
+// #include <stdlib.h>
+//
+import "C"
+
+import (
+	"unsafe"
+)
+
+// WriteOpCmpExtStep holds result of the CmpExt write operation.
+// Result is valid only after Operate() was called.
+type WriteOpCmpExtStep struct {
+	// C returned data:
+	prval *C.int
+
+	// Result of the CmpExt write operation.
+	Result int
+}
+
+func (s *WriteOpCmpExtStep) update() error {
+	s.Result = int(*s.prval)
+	return nil
+}
+
+func (s *WriteOpCmpExtStep) free() {
+	C.free(unsafe.Pointer(s.prval))
+	s.prval = nil
+}
+
+func newWriteOpCmpExtStep() *WriteOpCmpExtStep {
+	return &WriteOpCmpExtStep{
+		prval: (*C.int)(C.malloc(C.sizeof_int)),
+	}
+}
+
+// CmpExt ensures that given object range (extent) satisfies comparison.
+//  PREVIEW
+//
+// Implements:
+//  void rados_write_op_cmpext(rados_write_op_t write_op,
+//                             const char * cmp_buf,
+//                             size_t cmp_len,
+//                             uint64_t off,
+//                             int * prval);
+func (w *WriteOp) CmpExt(b []byte, offset uint64) *WriteOpCmpExtStep {
+	oe := newWriteStep(b, 0, offset)
+	cmpExtStep := newWriteOpCmpExtStep()
+	w.steps = append(w.steps, oe, cmpExtStep)
+	C.rados_write_op_cmpext(
+		w.op,
+		oe.cBuffer,
+		oe.cDataLen,
+		oe.cOffset,
+		cmpExtStep.prval)
+
+	return cmpExtStep
+}

vendor/github.com/ceph/go-ceph/rados/write_step.go

@@ -25,7 +25,7 @@ type writeStep struct {
 func newWriteStep(b []byte, writeLen, offset uint64) *writeStep {
 	return &writeStep{
 		b:         b,
-		cBuffer:   (*C.char)(unsafe.Pointer(&b[0])),
+		cBuffer:   (*C.char)(unsafe.Pointer(&b[0])), // TODO: must be pinned
 		cDataLen:  C.size_t(len(b)),
 		cWriteLen: C.size_t(writeLen),
 		cOffset:   C.uint64_t(offset),