linux: add UMA stat for the file system where the prefs are stored
I'd like to see how common it is to use a network file system for
your home directory. This would help evaluate how important it is
to support these users.
See also:
http://groups.google.com/a/chromium.org/group/chromium-dev/browse_thread/thread/b43d2905f079fa1c
Review URL: http://codereview.chromium.org/3187011
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@56786 0039d316-1c4b-4281-b951-d872f2087c98
CrOS-Libchrome-Original-Commit: 1d01d411a1d7e2ef29adf072855eb561e4c34cf7
diff --git a/base/base.gypi b/base/base.gypi
index d6e13b5..383f645 100644
--- a/base/base.gypi
+++ b/base/base.gypi
@@ -77,6 +77,7 @@
'file_util.cc',
'file_util.h',
'file_util_deprecated.h',
+ 'file_util_linux.cc',
'file_util_mac.mm',
'file_util_posix.cc',
'file_util_win.cc',
diff --git a/base/file_util.h b/base/file_util.h
index 91b16d2..ce30b5e 100644
--- a/base/file_util.h
+++ b/base/file_util.h
@@ -612,9 +612,29 @@
// is passed in. If it is 0 then the whole file is paged in. The step size
// which indicates the number of bytes to skip after every page touched is
// also passed in.
- bool PreReadImage(const wchar_t* file_path, size_t size_to_read,
- size_t step_size);
+bool PreReadImage(const wchar_t* file_path, size_t size_to_read,
+ size_t step_size);
#endif // OS_WIN
+
+#if defined(OS_LINUX)
+// Broad categories of file systems as returned by statfs() on Linux.
+enum FileSystemType {
+ FILE_SYSTEM_UNKNOWN, // statfs failed.
+ FILE_SYSTEM_0, // statfs.f_type == 0 means unknown, may indicate AFS.
+ FILE_SYSTEM_ORDINARY, // on-disk filesystem like ext2
+ FILE_SYSTEM_NFS,
+ FILE_SYSTEM_SMB,
+ FILE_SYSTEM_CODA,
+ FILE_SYSTEM_MEMORY, // in-memory file system
+ FILE_SYSTEM_OTHER, // any other value.
+ FILE_SYSTEM_TYPE_COUNT
+};
+
+// Attempts determine the FileSystemType for |path|.
+// Returns false if |path| doesn't exist.
+bool GetFileSystemType(const FilePath& path, FileSystemType* type);
+#endif
+
} // namespace file_util
// Deprecated functions have been moved to this separate header file,
diff --git a/base/file_util_linux.cc b/base/file_util_linux.cc
new file mode 100644
index 0000000..dd0c820
--- /dev/null
+++ b/base/file_util_linux.cc
@@ -0,0 +1,59 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/file_util.h"
+
+#include "base/file_path.h"
+
+#include <errno.h>
+#include <sys/vfs.h>
+
+namespace file_util {
+
+bool GetFileSystemType(const FilePath& path, FileSystemType* type) {
+ struct statfs statfs_buf;
+ if (statfs(path.value().c_str(), &statfs_buf) < 0) {
+ if (errno == ENOENT)
+ return false;
+ *type = FILE_SYSTEM_UNKNOWN;
+ return true;
+ }
+
+ // While you would think the possible values of f_type would be available
+ // in a header somewhere, it appears that is not the case. These values
+ // are copied from the statfs man page.
+ switch (statfs_buf.f_type) {
+ case 0:
+ *type = FILE_SYSTEM_0;
+ break;
+ case 0xEF53: // ext2, ext3.
+ case 0x4D44: // dos
+ case 0x5346544E: // NFTS
+ case 0x52654973: // reiser
+ case 0x58465342: // XFS
+ case 0x9123683E: // btrfs
+ case 0x3153464A: // JFS
+ *type = FILE_SYSTEM_ORDINARY;
+ break;
+ case 0x6969: // NFS
+ *type = FILE_SYSTEM_NFS;
+ break;
+ case 0xFF534D42: // CIFS
+ case 0x517B: // SMB
+ *type = FILE_SYSTEM_SMB;
+ break;
+ case 0x73757245: // Coda
+ *type = FILE_SYSTEM_CODA;
+ break;
+ case 0x858458f6: // ramfs
+ case 0x01021994: // tmpfs
+ *type = FILE_SYSTEM_MEMORY;
+ break;
+ default:
+ *type = FILE_SYSTEM_OTHER;
+ }
+ return true;
+}
+
+} // namespace