If the output array does not have enough space to fit all the
snapshots, -ERANGE is returned and the caller should retry with a
larger array.
@param io the pool to read from
@param snaps where to store the results
@param maxlen the number of rados_snap_t that fit in the snaps array
@returns number of snapshots on success, negative error code on failure
@returns -ERANGE is returned if the snaps array is too short
List all the ids of pool snapshots
If the output array does not have enough space to fit all the snapshots, -ERANGE is returned and the caller should retry with a larger array.
@param io the pool to read from @param snaps where to store the results @param maxlen the number of rados_snap_t that fit in the snaps array @returns number of snapshots on success, negative error code on failure @returns -ERANGE is returned if the snaps array is too short