ceph-csi/vendor/github.com/ceph/go-ceph/rbd/migration.go

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//go:build !(octopus || nautilus) && ceph_preview
// +build !octopus,!nautilus,ceph_preview
package rbd
// #cgo LDFLAGS: -lrbd
// #include <stdlib.h>
// #include <rados/librados.h>
// #include <rbd/librbd.h>
import "C"
import (
"unsafe"
"github.com/ceph/go-ceph/rados"
)
// MigrationImageState denotes the current migration status of a given image.
type MigrationImageState int
const (
// MigrationImageUnknown is the representation of
// RBD_IMAGE_MIGRATION_STATE_UNKNOWN from librbd.
MigrationImageUnknown = MigrationImageState(C.RBD_IMAGE_MIGRATION_STATE_UNKNOWN)
// MigrationImageError is the representation of
// RBD_IMAGE_MIGRATION_STATE_ERROR from librbd.
MigrationImageError = MigrationImageState(C.RBD_IMAGE_MIGRATION_STATE_ERROR)
// MigrationImagePreparing is the representation of
// RBD_IMAGE_MIGRATION_STATE_PREPARING from librbd.
MigrationImagePreparing = MigrationImageState(C.RBD_IMAGE_MIGRATION_STATE_PREPARING)
// MigrationImagePrepared is the representation of
// RBD_IMAGE_MIGRATION_STATE_PREPARED from librbd.
MigrationImagePrepared = MigrationImageState(C.RBD_IMAGE_MIGRATION_STATE_PREPARED)
// MigrationImageExecuting is the representation of
// RBD_IMAGE_MIGRATION_STATE_EXECUTING from librbd.
MigrationImageExecuting = MigrationImageState(C.RBD_IMAGE_MIGRATION_STATE_EXECUTING)
// MigrationImageExecuted is the representation of
// RBD_IMAGE_MIGRATION_STATE_EXECUTED from librbd.
MigrationImageExecuted = MigrationImageState(C.RBD_IMAGE_MIGRATION_STATE_EXECUTED)
// MigrationImageAborting is the representation of
// RBD_IMAGE_MIGRATION_STATE_ABORTING from librbd.
MigrationImageAborting = MigrationImageState(C.RBD_IMAGE_MIGRATION_STATE_ABORTING)
)
// MigrationImageStatus provides information about the
// live migration progress of an image.
type MigrationImageStatus struct {
SourcePoolID int
SourcePoolNamespace string
SourceImageName string
SourceImageID string
DestPoolID int
DestPoolNamespace string
DestImageName string
DestImageID string
State MigrationImageState
StateDescription string
}
// MigrationPrepare prepares a migration
// creating a target image with a link
// to source and making source read-only.
//
// Implements:
// int rbd_migration_prepare(rados_ioctx_t ioctx,
// const char *image_name,
// rados_ioctx_t dest_ioctx,
// const char *dest_image_name,
// rbd_image_options_t opts);
//
func MigrationPrepare(ioctx *rados.IOContext, sourceImageName string, destIoctx *rados.IOContext, destImageName string, rio *ImageOptions) error {
cSourceImageName := C.CString(sourceImageName)
cDestImageName := C.CString(destImageName)
defer func() {
C.free(unsafe.Pointer(cSourceImageName))
C.free(unsafe.Pointer(cDestImageName))
}()
ret := C.rbd_migration_prepare(
cephIoctx(ioctx),
cSourceImageName,
cephIoctx(destIoctx),
cDestImageName,
C.rbd_image_options_t(rio.options))
return getError(ret)
}
// MigrationPrepareImport prepares a migration for import
// from a specified source to a new target image.
//
// Implements:
// int rbd_migration_prepare_import(const char *source_spec,
// rados_ioctx_t dest_ioctx,
// const char *dest_image_name,
// rbd_image_options_t opts);
//
func MigrationPrepareImport(sourceSpec string, ioctx *rados.IOContext, destImageName string, rio *ImageOptions) error {
cSourceSpec := C.CString(sourceSpec)
cDestImageName := C.CString(destImageName)
defer func() {
C.free(unsafe.Pointer(cSourceSpec))
C.free(unsafe.Pointer(cDestImageName))
}()
ret := C.rbd_migration_prepare_import(
cSourceSpec,
cephIoctx(ioctx),
cDestImageName,
C.rbd_image_options_t(rio.options))
return getError(ret)
}
// MigrationExecute starts copying the image blocks
// from the source image to the target image.
//
// Implements:
// int rbd_migration_execute(rados_ioctx_t ioctx,
// const char *image_name);
//
func MigrationExecute(ioctx *rados.IOContext, name string) error {
cName := C.CString(name)
defer func() {
C.free(unsafe.Pointer(cName))
}()
ret := C.rbd_migration_execute(
cephIoctx(ioctx),
cName)
return getError(ret)
}
// MigrationCommit commits a migration after execution
// breaking the relationship of image to the source.
//
// Implements:
// int rbd_migration_commit(rados_ioctx_t ioctx,
// const char *image_name);
//
func MigrationCommit(ioctx *rados.IOContext, name string) error {
cName := C.CString(name)
defer func() {
C.free(unsafe.Pointer(cName))
}()
ret := C.rbd_migration_commit(
cephIoctx(ioctx),
cName)
return getError(ret)
}
// MigrationAbort aborts a migration in progress
// breaking the relationship of image to the source.
//
// Implements:
// int rbd_migration_abort(rados_ioctx_t ioctx,
// const char *image_name);
//
func MigrationAbort(ioctx *rados.IOContext, name string) error {
cName := C.CString(name)
defer func() {
C.free(unsafe.Pointer(cName))
}()
ret := C.rbd_migration_abort(
cephIoctx(ioctx),
cName)
return getError(ret)
}
// MigrationStatus retrieve status of a live migration
// for the specified image.
//
// Implements:
// int rbd_migration_status(rados_ioctx_t ioctx,
// const char *image_name,
// rbd_image_migration_status_t *status,
// size_t status_size);
//
func MigrationStatus(ioctx *rados.IOContext, name string) (*MigrationImageStatus, error) {
cName := C.CString(name)
defer func() {
C.free(unsafe.Pointer(cName))
}()
var status C.rbd_image_migration_status_t
ret := C.rbd_migration_status(
cephIoctx(ioctx),
cName,
&status,
C.sizeof_rbd_image_migration_status_t)
if ret != 0 {
return nil, getError(ret)
}
defer func() {
C.rbd_migration_status_cleanup(&status)
}()
return &MigrationImageStatus{
SourcePoolID: int(status.source_pool_id),
SourcePoolNamespace: C.GoString(status.source_pool_namespace),
SourceImageName: C.GoString(status.source_image_name),
SourceImageID: C.GoString(status.source_image_id),
DestPoolID: int(status.dest_pool_id),
DestPoolNamespace: C.GoString(status.dest_pool_namespace),
DestImageName: C.GoString(status.dest_image_name),
DestImageID: C.GoString(status.dest_image_id),
State: MigrationImageState(status.state),
StateDescription: C.GoString(status.state_description),
}, nil
}