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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2018 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package main
import (
"os"
"syscall"
)
func maybeReserveDiskSpace(f *os.File, size int64) error {
const fallocKeepSize = 1 // This is FALLOC_FL_KEEP_SIZE
if err := syscall.Fallocate(int(f.Fd()), fallocKeepSize, 0, size); err != nil {
if err != syscall.EOPNOTSUPP && err != syscall.ENOSYS {
return err
}
}
return nil
}
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