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git.proxmox.com Git - ceph.git/blob - ceph/src/os/filestore/XfsFileStoreBackend.cc
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 Inktank, Inc
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.
15 #include "XfsFileStoreBackend.h"
19 #include <sys/ioctl.h>
22 #include <sys/utsname.h>
26 #include "common/errno.h"
27 #include "common/linux_version.h"
28 #include "include/assert.h"
29 #include "include/compat.h"
31 #define dout_context cct()
32 #define dout_subsys ceph_subsys_filestore
34 #define dout_prefix *_dout << "xfsfilestorebackend(" << get_basedir_path() << ") "
36 XfsFileStoreBackend::XfsFileStoreBackend(FileStore
*fs
):
37 GenericFileStoreBackend(fs
), m_has_extsize(false) { }
40 * Set extsize attr on a file to val. Should be a free-standing
41 * function, but dout_prefix expanding to a call to get_basedir_path()
42 * protected member function won't let it.
44 int XfsFileStoreBackend::set_extsize(int fd
, unsigned int val
)
50 if (fstat(fd
, &sb
) < 0) {
52 dout(0) << "set_extsize: fstat: " << cpp_strerror(ret
) << dendl
;
55 if (!S_ISREG(sb
.st_mode
)) {
56 dout(0) << "set_extsize: invalid target file type" << dendl
;
60 if (ioctl(fd
, XFS_IOC_FSGETXATTR
, &fsx
) < 0) {
62 dout(0) << "set_extsize: FSGETXATTR: " << cpp_strerror(ret
) << dendl
;
67 if ((fsx
.fsx_xflags
& XFS_XFLAG_EXTSIZE
) && fsx
.fsx_extsize
== val
)
70 // xfs won't change extent size if any extents are allocated
71 if (fsx
.fsx_nextents
!= 0)
74 fsx
.fsx_xflags
|= XFS_XFLAG_EXTSIZE
;
75 fsx
.fsx_extsize
= val
;
77 if (ioctl(fd
, XFS_IOC_FSSETXATTR
, &fsx
) < 0) {
79 dout(0) << "set_extsize: FSSETXATTR: " << cpp_strerror(ret
) << dendl
;
86 int XfsFileStoreBackend::detect_features()
90 ret
= GenericFileStoreBackend::detect_features();
95 int fd
= ::openat(get_basedir_fd(), "extsize_test", O_CREAT
|O_WRONLY
, 0600);
98 dout(0) << "detect_feature: failed to create test file for extsize attr: "
99 << cpp_strerror(ret
) << dendl
;
102 if (::unlinkat(get_basedir_fd(), "extsize_test", 0) < 0) {
104 dout(0) << "detect_feature: failed to unlink test file for extsize attr: "
105 << cpp_strerror(ret
) << dendl
;
109 if (cct()->_conf
->filestore_xfs_extsize
) {
110 ret
= set_extsize(fd
, 1U << 15); // a few pages
113 dout(0) << "detect_feature: failed to set test file extsize, assuming extsize is NOT supported" << dendl
;
117 // make sure we have 3.5 or newer, which includes this fix
118 // aff3a9edb7080f69f07fe76a8bd089b3dfa4cb5d
119 // for this set_extsize bug
120 // http://oss.sgi.com/bugzilla/show_bug.cgi?id=874
121 int ver
= get_linux_version();
123 dout(0) << __func__
<< ": couldn't verify extsize not buggy, disabling extsize" << dendl
;
124 m_has_extsize
= false;
125 } else if (ver
< KERNEL_VERSION(3, 5, 0)) {
126 dout(0) << __func__
<< ": disabling extsize, your kernel < 3.5 and has buggy extsize ioctl" << dendl
;
127 m_has_extsize
= false;
129 dout(0) << __func__
<< ": extsize is supported and your kernel >= 3.5" << dendl
;
130 m_has_extsize
= true;
133 dout(0) << "detect_feature: extsize is disabled by conf" << dendl
;
137 TEMP_FAILURE_RETRY(::close(fd
));
142 int XfsFileStoreBackend::set_alloc_hint(int fd
, uint64_t hint
)
147 assert(hint
< UINT_MAX
);
148 return set_extsize(fd
, hint
);