rebase: update go-ceph to v0.8.0

Updating go-ceph to v0.8.0.

Signed-off-by: Mudit Agarwal <muagarwa@redhat.com>

vendor/github.com/ceph/go-ceph/rbd/group_snap.go

@@ -0,0 +1,223 @@
+package rbd
+
+/*
+#cgo LDFLAGS: -lrbd
+#include <errno.h>
+#include <stdlib.h>
+#include <rbd/librbd.h>
+
+extern int snapRollbackCallback(uint64_t, uint64_t, uintptr_t);
+
+// inline wrapper to cast uintptr_t to void*
+static inline int wrap_rbd_group_snap_rollback_with_progress(
+		rados_ioctx_t group_p, const char *group_name,
+		const char *snap_name, uintptr_t arg) {
+	return rbd_group_snap_rollback_with_progress(
+		group_p, group_name, snap_name, (librbd_progress_fn_t)snapRollbackCallback, (void*)arg);
+};
+*/
+import "C"
+
+import (
+	"unsafe"
+
+	"github.com/ceph/go-ceph/internal/callbacks"
+	"github.com/ceph/go-ceph/internal/retry"
+	"github.com/ceph/go-ceph/rados"
+)
+
+// GroupSnapCreate will create a group snapshot.
+//
+// Implements:
+//  int rbd_group_snap_create(rados_ioctx_t group_p,
+//                            const char *group_name,
+//                            const char *snap_name);
+func GroupSnapCreate(ioctx *rados.IOContext, group, snap string) error {
+	cGroupName := C.CString(group)
+	defer C.free(unsafe.Pointer(cGroupName))
+	cSnapName := C.CString(snap)
+	defer C.free(unsafe.Pointer(cSnapName))
+
+	ret := C.rbd_group_snap_create(cephIoctx(ioctx), cGroupName, cSnapName)
+	return getError(ret)
+}
+
+// GroupSnapRemove removes an existing group snapshot.
+//
+// Implements:
+//  int rbd_group_snap_remove(rados_ioctx_t group_p,
+//                            const char *group_name,
+//                            const char *snap_name);
+func GroupSnapRemove(ioctx *rados.IOContext, group, snap string) error {
+	cGroupName := C.CString(group)
+	defer C.free(unsafe.Pointer(cGroupName))
+	cSnapName := C.CString(snap)
+	defer C.free(unsafe.Pointer(cSnapName))
+
+	ret := C.rbd_group_snap_remove(cephIoctx(ioctx), cGroupName, cSnapName)
+	return getError(ret)
+}
+
+// GroupSnapRename will rename an existing group snapshot.
+//
+// Implements:
+//  int rbd_group_snap_rename(rados_ioctx_t group_p,
+//                            const char *group_name,
+//                            const char *old_snap_name,
+//                            const char *new_snap_name);
+func GroupSnapRename(ioctx *rados.IOContext, group, src, dest string) error {
+	cGroupName := C.CString(group)
+	defer C.free(unsafe.Pointer(cGroupName))
+	cOldSnapName := C.CString(src)
+	defer C.free(unsafe.Pointer(cOldSnapName))
+	cNewSnapName := C.CString(dest)
+	defer C.free(unsafe.Pointer(cNewSnapName))
+
+	ret := C.rbd_group_snap_rename(
+		cephIoctx(ioctx), cGroupName, cOldSnapName, cNewSnapName)
+	return getError(ret)
+}
+
+// GroupSnapState represents the state of a group snapshot in GroupSnapInfo.
+type GroupSnapState int
+
+const (
+	// GroupSnapStateIncomplete is equivalent to RBD_GROUP_SNAP_STATE_INCOMPLETE.
+	GroupSnapStateIncomplete = GroupSnapState(C.RBD_GROUP_SNAP_STATE_INCOMPLETE)
+	// GroupSnapStateComplete is equivalent to RBD_GROUP_SNAP_STATE_COMPLETE.
+	GroupSnapStateComplete = GroupSnapState(C.RBD_GROUP_SNAP_STATE_COMPLETE)
+)
+
+// GroupSnapInfo values are returned by GroupSnapList, representing the
+// snapshots that are part of an rbd group.
+type GroupSnapInfo struct {
+	Name  string
+	State GroupSnapState
+}
+
+// GroupSnapList returns a slice of snapshots in a group.
+//
+// Implements:
+//  int rbd_group_snap_list(rados_ioctx_t group_p,
+//                          const char *group_name,
+//                          rbd_group_snap_info_t *snaps,
+//                          size_t group_snap_info_size,
+//                          size_t *num_entries);
+func GroupSnapList(ioctx *rados.IOContext, group string) ([]GroupSnapInfo, error) {
+	cGroupName := C.CString(group)
+	defer C.free(unsafe.Pointer(cGroupName))
+
+	var (
+		cSnaps []C.rbd_group_snap_info_t
+		cSize  C.size_t
+		err    error
+	)
+	retry.WithSizes(1024, 262144, func(size int) retry.Hint {
+		cSize = C.size_t(size)
+		cSnaps = make([]C.rbd_group_snap_info_t, cSize)
+		ret := C.rbd_group_snap_list(
+			cephIoctx(ioctx),
+			cGroupName,
+			(*C.rbd_group_snap_info_t)(unsafe.Pointer(&cSnaps[0])),
+			C.sizeof_rbd_group_snap_info_t,
+			&cSize)
+		err = getErrorIfNegative(ret)
+		return retry.Size(int(cSize)).If(err == errRange)
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	snaps := make([]GroupSnapInfo, cSize)
+	for i := range snaps {
+		snaps[i].Name = C.GoString(cSnaps[i].name)
+		snaps[i].State = GroupSnapState(cSnaps[i].state)
+	}
+
+	// free C memory allocated by C.rbd_group_snap_list call
+	ret := C.rbd_group_snap_list_cleanup(
+		(*C.rbd_group_snap_info_t)(unsafe.Pointer(&cSnaps[0])),
+		C.sizeof_rbd_group_snap_info_t,
+		cSize)
+	return snaps, getError(ret)
+}
+
+// GroupSnapRollback will roll back the images in the group to that of the
+// given snapshot.
+//
+// Implements:
+//  int rbd_group_snap_rollback(rados_ioctx_t group_p,
+//                              const char *group_name,
+//                              const char *snap_name);
+func GroupSnapRollback(ioctx *rados.IOContext, group, snap string) error {
+	cGroupName := C.CString(group)
+	defer C.free(unsafe.Pointer(cGroupName))
+	cSnapName := C.CString(snap)
+	defer C.free(unsafe.Pointer(cSnapName))
+
+	ret := C.rbd_group_snap_rollback(cephIoctx(ioctx), cGroupName, cSnapName)
+	return getError(ret)
+}
+
+// GroupSnapRollbackCallback defines the function signature needed for the
+// GroupSnapRollbackWithProgress callback.
+//
+// This callback will be called by GroupSnapRollbackWithProgress when it
+// wishes to report progress rolling back a group snapshot.
+type GroupSnapRollbackCallback func(uint64, uint64, interface{}) int
+
+var groupSnapRollbackCallbacks = callbacks.New()
+
+// GroupSnapRollbackWithProgress will roll back the images in the group
+// to that of given snapshot. The given progress callback will be called
+// to report on the progress of the snapshot rollback.
+//
+// Implements:
+//  int rbd_group_snap_rollback_with_progress(rados_ioctx_t group_p,
+//                                            const char *group_name,
+//                                            const char *snap_name,
+//                                            librbd_progress_fn_t cb,
+//                                            void *cbdata);
+func GroupSnapRollbackWithProgress(
+	ioctx *rados.IOContext, group, snap string,
+	cb GroupSnapRollbackCallback, data interface{}) error {
+	// the provided callback must be a real function
+	if cb == nil {
+		return rbdError(C.EINVAL)
+	}
+
+	cGroupName := C.CString(group)
+	defer C.free(unsafe.Pointer(cGroupName))
+	cSnapName := C.CString(snap)
+	defer C.free(unsafe.Pointer(cSnapName))
+
+	ctx := gsnapRollbackCallbackCtx{
+		callback: cb,
+		data:     data,
+	}
+	cbIndex := groupSnapRollbackCallbacks.Add(ctx)
+	defer diffIterateCallbacks.Remove(cbIndex)
+
+	ret := C.wrap_rbd_group_snap_rollback_with_progress(
+		cephIoctx(ioctx),
+		cGroupName,
+		cSnapName,
+		C.uintptr_t(cbIndex))
+
+	return getError(ret)
+}
+
+type gsnapRollbackCallbackCtx struct {
+	callback GroupSnapRollbackCallback
+	data     interface{}
+}
+
+//export snapRollbackCallback
+func snapRollbackCallback(
+	offset, total C.uint64_t, index uintptr) C.int {
+
+	v := groupSnapRollbackCallbacks.Lookup(index)
+	ctx := v.(gsnapRollbackCallbackCtx)
+	return C.int(ctx.callback(uint64(offset), uint64(total), ctx.data))
+}