1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 * Ceph - scalable distributed file system
6 * Copyright (C) 2014 Red Hat
8 * This is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License version 2.1, as published by the Free Software
11 * Foundation. See file COPYING.
19 int XFS::set_alloc_hint(int fd, uint64_t val)
25 if (fstat(fd, &sb) < 0) {
29 if (!S_ISREG(sb.st_mode)) {
33 if (ioctl(fd, XFS_IOC_FSGETXATTR, &fsx) < 0) {
39 if ((fsx.fsx_xflags & XFS_XFLAG_EXTSIZE) && fsx.fsx_extsize == val)
42 // xfs won't change extent size if any extents are allocated
43 if (fsx.fsx_nextents != 0)
46 fsx.fsx_xflags |= XFS_XFLAG_EXTSIZE;
47 fsx.fsx_extsize = val;
49 if (ioctl(fd, XFS_IOC_FSSETXATTR, &fsx) < 0) {