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https://github.com/ceph/go-ceph
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c06593eef7
There are several RbdImageOptions that can be used to configure features of an RBD image while creating, cloning, migrating and copying. A follow-up patch will add Create4() where the RbdImageOptions can be used. Signed-off-by: Niels de Vos <ndevos@redhat.com>
123 lines
3.3 KiB
Go
123 lines
3.3 KiB
Go
package rbd
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// #cgo LDFLAGS: -lrbd
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// #include <stdlib.h>
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// #include <rbd/librbd.h>
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import "C"
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import (
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"fmt"
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"unsafe"
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)
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const (
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// RBD image options.
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RbdImageOptionFormat = C.RBD_IMAGE_OPTION_FORMAT
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RbdImageOptionFeatures = C.RBD_IMAGE_OPTION_FEATURES
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RbdImageOptionOrder = C.RBD_IMAGE_OPTION_ORDER
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RbdImageOptionStripeUnit = C.RBD_IMAGE_OPTION_STRIPE_UNIT
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RbdImageOptionStripeCount = C.RBD_IMAGE_OPTION_STRIPE_COUNT
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RbdImageOptionJournalOrder = C.RBD_IMAGE_OPTION_JOURNAL_ORDER
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RbdImageOptionJournalSplayWidth = C.RBD_IMAGE_OPTION_JOURNAL_SPLAY_WIDTH
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RbdImageOptionJournalPool = C.RBD_IMAGE_OPTION_JOURNAL_POOL
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RbdImageOptionFeaturesSet = C.RBD_IMAGE_OPTION_FEATURES_SET
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RbdImageOptionFeaturesClear = C.RBD_IMAGE_OPTION_FEATURES_CLEAR
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RbdImageOptionDataPool = C.RBD_IMAGE_OPTION_DATA_POOL
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// introduced with Ceph Mimic
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//RbdImageOptionFlatten = C.RBD_IMAGE_OPTION_FLATTEN
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)
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type RbdImageOptions struct {
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options C.rbd_image_options_t
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}
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type RbdImageOption C.int
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func NewRbdImageOptions() *RbdImageOptions {
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rio := &RbdImageOptions{}
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C.rbd_image_options_create(&rio.options)
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return rio
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}
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func (rio *RbdImageOptions) Destroy() {
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C.rbd_image_options_destroy(rio.options)
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}
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func (rio *RbdImageOptions) SetString(option RbdImageOption, value string) error {
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c_value := C.CString(value)
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defer C.free(unsafe.Pointer(c_value))
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ret := C.rbd_image_options_set_string(rio.options, C.int(option), c_value)
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if ret != 0 {
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return fmt.Errorf("%v, could not set option %v to \"%v\"",
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GetError(ret), option, value)
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}
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return nil
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}
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func (rio *RbdImageOptions) GetString(option RbdImageOption) (string, error) {
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value := make([]byte, 4096)
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ret := C.rbd_image_options_get_string(rio.options, C.int(option),
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(*C.char)(unsafe.Pointer(&value[0])),
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C.size_t(len(value)))
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if ret != 0 {
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return "", fmt.Errorf("%v, could not get option %v", GetError(ret), option)
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}
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return C.GoString((*C.char)(unsafe.Pointer(&value[0]))), nil
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}
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func (rio *RbdImageOptions) SetUint64(option RbdImageOption, value uint64) error {
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c_value := C.uint64_t(value)
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ret := C.rbd_image_options_set_uint64(rio.options, C.int(option), c_value)
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if ret != 0 {
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return fmt.Errorf("%v, could not set option %v to \"%v\"",
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GetError(ret), option, value)
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}
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return nil
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}
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func (rio *RbdImageOptions) GetUint64(option RbdImageOption) (uint64, error) {
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var c_value C.uint64_t
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ret := C.rbd_image_options_get_uint64(rio.options, C.int(option), &c_value)
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if ret != 0 {
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return 0, fmt.Errorf("%v, could not get option %v", GetError(ret), option)
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}
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return uint64(c_value), nil
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}
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func (rio *RbdImageOptions) IsSet(option RbdImageOption) (bool, error) {
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var c_set C.bool
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ret := C.rbd_image_options_is_set(rio.options, C.int(option), &c_set)
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if ret != 0 {
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return false, fmt.Errorf("%v, could not check option %v", GetError(ret), option)
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}
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return bool(c_set), nil
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}
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func (rio *RbdImageOptions) Unset(option RbdImageOption) error {
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ret := C.rbd_image_options_unset(rio.options, C.int(option))
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if ret != 0 {
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return fmt.Errorf("%v, could not unset option %v", GetError(ret), option)
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}
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return nil
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}
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func (rio *RbdImageOptions) Clear() {
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C.rbd_image_options_clear(rio.options)
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}
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func (rio *RbdImageOptions) IsEmpty() bool {
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ret := C.rbd_image_options_is_empty(rio.options)
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return ret != 0
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}
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