// int rbd_snap_list(rbd_image_t image, rbd_snap_info_t *snaps, int *max_snaps);
// void rbd_snap_list_end(rbd_snap_info_t *snaps);
func (image *Image) GetSnapshotNames() (snaps []SnapInfo, err error) {
if image.image == nil {
return nil, RbdErrorImageNotOpen
}
var c_max_snaps C.int = 0
ret := C.rbd_snap_list(image.image, nil, &c_max_snaps)
c_snaps := make([]C.rbd_snap_info_t, c_max_snaps)
snaps = make([]SnapInfo, c_max_snaps)
ret = C.rbd_snap_list(image.image,
&c_snaps[0], &c_max_snaps)
if ret < 0 {
return nil, RBDError(int(ret))
}
for i, s := range c_snaps {
snaps[i] = SnapInfo{Id: uint64(s.id),
Size: uint64(s.size),
Name: C.GoString(s.name)}
}
C.rbd_snap_list_end(&c_snaps[0])
return snaps[:len(snaps)-1], nil
}
// ListSnapshots yields a list of the snapshots for the given interface. max
// will yield a maximum of N items.
func (img *Image) ListSnapshots(max int) ([]string, error) {
snapInfo := make([]C.rbd_snap_info_t, max)
list := []string{}
cMax := C.int(max)
action := func(image *C.rbd_image_t) error {
if i, err := C.rbd_snap_list(*image, &snapInfo[0], &cMax); err != nil || i < 0 {
return strerror(i)
}
for i := 0; i < int(cMax); i++ {
if C.GoString(snapInfo[i].name) == "" {
return nil
}
list = append(list, C.GoString(snapInfo[i].name))
}
return nil
}
if err := img.pool.wrapOpen(img.imageName, action); err != nil {
return nil, err
}
return list, nil
}