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