mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-23 06:40:23 +00:00
46 lines
1.2 KiB
Go
46 lines
1.2 KiB
Go
// +build !luminous,!mimic
|
|
//
|
|
// Ceph Nautilus is the first release that includes rbd_list2().
|
|
|
|
package rbd
|
|
|
|
// #cgo LDFLAGS: -lrbd
|
|
// #include <rados/librados.h>
|
|
// #include <rbd/librbd.h>
|
|
// #include <errno.h>
|
|
import "C"
|
|
|
|
import (
|
|
"fmt"
|
|
"unsafe"
|
|
|
|
"github.com/ceph/go-ceph/rados"
|
|
)
|
|
|
|
// GetImageNames returns the list of current RBD images.
|
|
func GetImageNames(ioctx *rados.IOContext) ([]string, error) {
|
|
size := C.size_t(0)
|
|
ret := C.rbd_list2(C.rados_ioctx_t(ioctx.Pointer()), nil, &size)
|
|
if ret < 0 && ret != -C.ERANGE {
|
|
return nil, RBDError(ret)
|
|
} else if ret > 0 {
|
|
return nil, fmt.Errorf("rbd_list2() returned %d names, expected 0", ret)
|
|
} else if ret == 0 && size == 0 {
|
|
return nil, nil
|
|
}
|
|
|
|
// expected: ret == -ERANGE, size contains number of image names
|
|
images := make([]C.rbd_image_spec_t, size)
|
|
ret = C.rbd_list2(C.rados_ioctx_t(ioctx.Pointer()), (*C.rbd_image_spec_t)(unsafe.Pointer(&images[0])), &size)
|
|
if ret < 0 {
|
|
return nil, RBDError(ret)
|
|
}
|
|
defer C.rbd_image_spec_list_cleanup((*C.rbd_image_spec_t)(unsafe.Pointer(&images[0])), size)
|
|
|
|
names := make([]string, size)
|
|
for i, image := range images {
|
|
names[i] = C.GoString(image.name)
|
|
}
|
|
return names, nil
|
|
}
|