rebase: bump go-ceph version to v0.16.0

go-ceph v0.16.0 contains subvolume metadata APIs and subvolume snapshot
metadata APIs.

Please note, as the APIs can not be tested in the go-ceph CI, it requires
build-tag `ceph_ci_untested`.

Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>

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

@@ -43,6 +43,11 @@ const (
 	// CreateIdempotent if used with IOContext.Create() and the object
 	// already exists, the function will not return an error.
 	CreateIdempotent = C.LIBRADOS_CREATE_IDEMPOTENT
+
+	defaultListObjectsResultSize = 1000
+	// listEndSentinel is the value returned by rados_list_object_list_is_end
+	// when a cursor has reached the end of a pool
+	listEndSentinel = 1
 )
 
 //revive:disable:var-naming old-yet-exported public api
@@ -302,22 +307,36 @@ type ObjectListFunc func(oid string)
 // RadosAllNamespaces before calling this function to return objects from all
 // namespaces
 func (ioctx *IOContext) ListObjects(listFn ObjectListFunc) error {
-	var ctx C.rados_list_ctx_t
-	ret := C.rados_nobjects_list_open(ioctx.ioctx, &ctx)
-	if ret < 0 {
-		return getError(ret)
+	pageResults := C.size_t(defaultListObjectsResultSize)
+	var filterLen C.size_t
+	results := make([]C.rados_object_list_item, pageResults)
+
+	next := C.rados_object_list_begin(ioctx.ioctx)
+	if next == nil {
+		return ErrNotFound
 	}
-	defer func() { C.rados_nobjects_list_close(ctx) }()
+	defer C.rados_object_list_cursor_free(ioctx.ioctx, next)
+	finish := C.rados_object_list_end(ioctx.ioctx)
+	if finish == nil {
+		return ErrNotFound
+	}
+	defer C.rados_object_list_cursor_free(ioctx.ioctx, finish)
 
 	for {
-		var cEntry *C.char
-		ret := C.rados_nobjects_list_next(ctx, &cEntry, nil, nil)
-		if ret == -C.ENOENT {
-			return nil
-		} else if ret < 0 {
+		ret := C.rados_object_list(ioctx.ioctx, next, finish, pageResults, nil, filterLen, (*C.rados_object_list_item)(unsafe.Pointer(&results[0])), &next)
+		if ret < 0 {
 			return getError(ret)
 		}
-		listFn(C.GoString(cEntry))
+
+		numEntries := int(ret)
+		for i := 0; i < numEntries; i++ {
+			item := results[i]
+			listFn(C.GoStringN(item.oid, (C.int)(item.oid_length)))
+		}
+
+		if C.rados_object_list_is_end(ioctx.ioctx, next) == listEndSentinel {
+			return nil
+		}
 	}
 }
 

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

@@ -1,6 +1,3 @@
-//go:build ceph_preview
-// +build ceph_preview
-
 package rados
 
 // #cgo LDFLAGS: -lrados
@@ -12,7 +9,6 @@ import "C"
 // AssertVersion ensures that the object exists and that its internal version
 // number is equal to "ver" before reading. "ver" should be a version number
 // previously obtained with IOContext.GetLastVersion().
-//  PREVIEW
 //
 // Implements:
 //  void rados_read_op_assert_version(rados_read_op_t read_op,

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

@@ -16,7 +16,6 @@ import (
 // SetLocator sets the key for mapping objects to pgs within an io context.
 // Until a different locator key is set, all objects in this io context will be placed in the same pg.
 // To reset the locator, an empty string must be set.
-//  PREVIEW
 //
 // Implements:
 //  void rados_ioctx_locator_set_key(rados_ioctx_t io, const char *key);

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

@@ -1,6 +1,3 @@
-//go:build ceph_preview
-// +build ceph_preview
-
 package rados
 
 // #cgo LDFLAGS: -lrados
@@ -12,7 +9,6 @@ import "C"
 // AssertVersion ensures that the object exists and that its internal version
 // number is equal to "ver" before writing. "ver" should be a version number
 // previously obtained with IOContext.GetLastVersion().
-//  PREVIEW
 //
 // Implements:
 //  void rados_read_op_assert_version(rados_read_op_t read_op,

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

@@ -1,6 +1,3 @@
-//go:build ceph_preview
-// +build ceph_preview
-
 package rados
 
 // #cgo LDFLAGS: -lrados
@@ -10,7 +7,6 @@ package rados
 import "C"
 
 // Remove object.
-//  PREVIEW
 //
 // Implements:
 //  void rados_write_op_remove(rados_write_op_t write_op)

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

@@ -1,6 +1,3 @@
-//go:build ceph_preview
-// +build ceph_preview
-
 package rados
 
 // #cgo LDFLAGS: -lrados
@@ -14,7 +11,6 @@ import (
 )
 
 // SetXattr sets an xattr.
-//  PREVIEW
 //
 // Implements:
 //  void rados_write_op_setxattr(rados_write_op_t write_op,

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

@@ -1,6 +1,3 @@
-//go:build ceph_preview
-// +build ceph_preview
-
 package rados
 
 // #cgo LDFLAGS: -lrados
@@ -58,7 +55,6 @@ func (s *ReadOpOmapGetValsByKeysStep) update() error {
 // ReadOpOmapGetValsByKeysStep's internal iterator.
 // If there are no more elements to retrieve, (nil, nil) is returned.
 // May be called only after Operate() finished.
-//  PREVIEW
 func (s *ReadOpOmapGetValsByKeysStep) Next() (*OmapKeyValue, error) {
 	if !s.canIterate {
 		return nil, ErrOperationIncomplete
@@ -88,7 +84,6 @@ func (s *ReadOpOmapGetValsByKeysStep) Next() (*OmapKeyValue, error) {
 }
 
 // GetOmapValuesByKeys starts iterating over specific key/value pairs.
-//  PREVIEW
 //
 // Implements:
 //  void rados_read_op_omap_get_vals_by_keys2(rados_read_op_t read_op,

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

@@ -1,6 +1,3 @@
-//go:build ceph_preview
-// +build ceph_preview
-
 package rados
 
 // #cgo LDFLAGS: -lrados
@@ -49,7 +46,6 @@ func newReadOpReadStep() *ReadOpReadStep {
 // Read bytes from offset into buffer.
 // len(buffer) is the maximum number of bytes read from the object.
 // buffer[:ReadOpReadStep.BytesRead] then contains object data.
-//  PREVIEW
 //
 // Implements:
 //  void rados_read_op_read(rados_read_op_t read_op,

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

@@ -1,6 +1,3 @@
-//go:build ceph_preview
-// +build ceph_preview
-
 package rados
 
 /*
@@ -69,7 +66,6 @@ var (
 )
 
 // Watch creates a Watcher for the specified object.
-//  PREVIEW
 //
 // A Watcher receives all notifications that are sent to the object on which it
 // has been created. It exposes two read-only channels: Events() receives all
@@ -103,7 +99,6 @@ func (ioctx *IOContext) Watch(obj string) (*Watcher, error) {
 
 // WatchWithTimeout creates a watcher on an object. Same as Watcher(), but
 // different timeout than the default can be specified.
-//  PREVIEW
 //
 // Implements:
 //  int rados_watch3(rados_ioctx_t io, const char *o, uint64_t *cookie,
@@ -142,26 +137,22 @@ func (ioctx *IOContext) WatchWithTimeout(oid string, timeout time.Duration) (*Wa
 }
 
 // ID returns the WatcherId of the Watcher
-//  PREVIEW
 func (w *Watcher) ID() WatcherID {
 	return w.id
 }
 
 // Events returns a read-only channel, that receives all notifications that are
 // sent to the object of the Watcher.
-//  PREVIEW
 func (w *Watcher) Events() <-chan NotifyEvent {
 	return w.events
 }
 
 // Errors returns a read-only channel, that receives all errors for the Watcher.
-//  PREVIEW
 func (w *Watcher) Errors() <-chan error {
 	return w.errors
 }
 
 // Check on the status of a Watcher.
-//  PREVIEW
 //
 // Returns the time since it was last confirmed. If there is an error, the
 // Watcher is no longer valid, and should be destroyed with the Delete() method.
@@ -177,7 +168,6 @@ func (w *Watcher) Check() (time.Duration, error) {
 }
 
 // Delete the watcher. This closes both the event and error channel.
-//  PREVIEW
 //
 // Implements:
 //  int rados_unwatch2(rados_ioctx_t io, uint64_t cookie)
@@ -203,7 +193,6 @@ func (w *Watcher) Delete() error {
 
 // Notify sends a notification with the provided data to all Watchers of the
 // specified object.
-//  PREVIEW
 //
 // CAUTION: even if the error is not nil. the returned slices
 // might still contain data.
@@ -213,7 +202,6 @@ func (ioctx *IOContext) Notify(obj string, data []byte) ([]NotifyAck, []NotifyTi
 
 // NotifyWithTimeout is like Notify() but with a different timeout than the
 // default.
-//  PREVIEW
 //
 // Implements:
 //  int rados_notify2(rados_ioctx_t io, const char* o, const char* buf, int buf_len,
@@ -246,7 +234,6 @@ func (ioctx *IOContext) NotifyWithTimeout(obj string, data []byte, timeout time.
 // Ack sends an acknowledgement with the specified response data to the notfier
 // of the NotifyEvent. If a notify is not ack'ed, the originating Notify() call
 // blocks and eventiually times out.
-//  PREVIEW
 //
 // Implements:
 //  int rados_notify_ack(rados_ioctx_t io, const char *o, uint64_t notify_id,
@@ -276,7 +263,6 @@ func (ne *NotifyEvent) Ack(response []byte) error {
 }
 
 // WatcherFlush flushes all pending notifications of the cluster.
-//  PREVIEW
 //
 // Implements:
 //  int rados_watch_flush(rados_t cluster)