| 1 | /* $Id: fs-win.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - File System, Win32.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #define LOG_GROUP RTLOGGROUP_FS
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| 42 | #include <iprt/win/windows.h>
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| 43 |
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| 44 | #include <iprt/fs.h>
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| 45 | #include <iprt/path.h>
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| 46 | #include <iprt/string.h>
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| 47 | #include <iprt/param.h>
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| 48 | #include <iprt/err.h>
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| 49 | #include <iprt/log.h>
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| 50 | #include <iprt/assert.h>
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| 51 | #include "internal/fs.h"
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| 52 |
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| 53 | /* from ntdef.h */
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| 54 | typedef LONG NTSTATUS;
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| 55 |
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| 56 | /* from ntddk.h */
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| 57 | typedef struct _IO_STATUS_BLOCK {
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| 58 | union {
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| 59 | NTSTATUS Status;
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| 60 | PVOID Pointer;
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| 61 | };
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| 62 | ULONG_PTR Information;
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| 63 | } IO_STATUS_BLOCK, *PIO_STATUS_BLOCK;
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| 64 |
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| 65 | typedef enum _FSINFOCLASS {
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| 66 | FileFsAttributeInformation = 5,
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| 67 | } FS_INFORMATION_CLASS, *PFS_INFORMATION_CLASS;
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| 68 |
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| 69 | /* from ntifs.h */
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| 70 |
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| 71 | typedef struct _FILE_FS_ATTRIBUTE_INFORMATION {
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| 72 | ULONG FileSystemAttributes;
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| 73 | LONG MaximumComponentNameLength;
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| 74 | ULONG FileSystemNameLength;
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| 75 | WCHAR FileSystemName[1];
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| 76 | } FILE_FS_ATTRIBUTE_INFORMATION, *PFILE_FS_ATTRIBUTE_INFORMATION;
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| 77 |
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| 78 | extern "C" NTSTATUS NTAPI NtQueryVolumeInformationFile(HANDLE, PIO_STATUS_BLOCK, PVOID, ULONG, FS_INFORMATION_CLASS);
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| 79 |
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| 80 | /**
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| 81 | * Checks quickly if this is an correct root specification.
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| 82 | * Root specs ends with a slash of some kind.
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| 83 | *
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| 84 | * @returns indicator.
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| 85 | * @param pszFsPath Path to check.
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| 86 | */
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| 87 | static bool rtFsIsRoot(const char *pszFsPath)
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| 88 | {
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| 89 | /*
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| 90 | * UNC has exactly two slashes..
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| 91 | *
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| 92 | * Anything else starting with slashe(s) requires
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| 93 | * expansion and will have to take the long road.
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| 94 | */
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| 95 | if (RTPATH_IS_SLASH(pszFsPath[0]))
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| 96 | {
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| 97 | if ( !RTPATH_IS_SLASH(pszFsPath[1])
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| 98 | || RTPATH_IS_SLASH(pszFsPath[2]))
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| 99 | return false;
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| 100 |
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| 101 | /* end of machine name */
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| 102 | const char *pszSlash = strpbrk(pszFsPath + 2, "\\/");
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| 103 | if (!pszSlash)
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| 104 | return false;
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| 105 |
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| 106 | /* end of service name. */
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| 107 | pszSlash = strpbrk(pszSlash + 1, "\\/");
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| 108 | if (!pszSlash)
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| 109 | return false;
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| 110 |
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| 111 | return pszSlash[1] == '\0';
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| 112 | }
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| 113 |
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| 114 | /*
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| 115 | * Ok the other alternative is driver letter.
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| 116 | */
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| 117 | return pszFsPath[0] >= 'A' && pszFsPath[0] <= 'Z'
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| 118 | && pszFsPath[1] == ':'
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| 119 | && RTPATH_IS_SLASH(pszFsPath[2])
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| 120 | && !pszFsPath[3];
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| 121 | }
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| 122 |
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| 123 |
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| 124 |
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| 125 | /**
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| 126 | * Finds the root of the specified volume.
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| 127 | *
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| 128 | * @returns iprt status code.
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| 129 | * @param pszFsPath Path within the filesystem. Verified as one byte or more.
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| 130 | * @param ppwszFsRoot Where to store the returned string. Free with rtFsFreeRoot(),
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| 131 | */
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| 132 | static int rtFsGetRoot(const char *pszFsPath, PRTUTF16 *ppwszFsRoot)
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| 133 | {
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| 134 | /*
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| 135 | * Do straight forward stuff first,
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| 136 | */
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| 137 | if (rtFsIsRoot(pszFsPath))
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| 138 | return RTStrToUtf16(pszFsPath, ppwszFsRoot);
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| 139 |
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| 140 | /*
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| 141 | * Expand and add slash (if required).
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| 142 | */
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| 143 | char szFullPath[RTPATH_MAX];
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| 144 | int rc = RTPathAbs(pszFsPath, szFullPath, sizeof(szFullPath));
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| 145 | if (RT_FAILURE(rc))
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| 146 | return rc;
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| 147 | size_t cb = strlen(szFullPath);
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| 148 | if (!RTPATH_IS_SLASH(szFullPath[cb - 1]))
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| 149 | {
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| 150 | AssertReturn(cb + 1 < RTPATH_MAX, VERR_FILENAME_TOO_LONG);
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| 151 | szFullPath[cb] = '\\';
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| 152 | szFullPath[++cb] = '\0';
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| 153 | }
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| 154 |
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| 155 | /*
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| 156 | * Convert the path.
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| 157 | */
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| 158 | rc = RTStrToUtf16(szFullPath, ppwszFsRoot);
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| 159 | if (RT_FAILURE(rc))
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| 160 | return rc == VERR_BUFFER_OVERFLOW ? VERR_FILENAME_TOO_LONG : rc;
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| 161 |
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| 162 | /*
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| 163 | * Walk the path until our proper API is happy or there is no more path left.
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| 164 | */
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| 165 | PRTUTF16 pwszStart = *ppwszFsRoot;
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| 166 | if (!GetVolumeInformationW(pwszStart, NULL, 0, NULL, NULL, 0, NULL, 0))
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| 167 | {
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| 168 | PRTUTF16 pwszEnd = pwszStart + RTUtf16Len(pwszStart);
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| 169 | PRTUTF16 pwszMin = pwszStart + 2;
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| 170 | do
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| 171 | {
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| 172 | /* Strip off the last path component. */
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| 173 | while (pwszEnd-- > pwszMin)
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| 174 | if (RTPATH_IS_SLASH(*pwszEnd))
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| 175 | break;
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| 176 | AssertReturn(pwszEnd >= pwszMin, VERR_INTERNAL_ERROR); /* leaks, but that's irrelevant for an internal error. */
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| 177 | pwszEnd[1] = '\0';
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| 178 | } while (!GetVolumeInformationW(pwszStart, NULL, 0, NULL, NULL, 0, NULL, 0));
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| 179 | }
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| 180 |
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| 181 | return VINF_SUCCESS;
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| 182 | }
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| 183 |
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| 184 | /**
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| 185 | * Frees string returned by rtFsGetRoot().
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| 186 | */
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| 187 | static void rtFsFreeRoot(PRTUTF16 pwszFsRoot)
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| 188 | {
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| 189 | RTUtf16Free(pwszFsRoot);
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| 190 | }
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| 191 |
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| 192 |
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| 193 | RTR3DECL(int) RTFsQuerySizes(const char *pszFsPath, RTFOFF *pcbTotal, RTFOFF *pcbFree,
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| 194 | uint32_t *pcbBlock, uint32_t *pcbSector)
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| 195 | {
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| 196 | /*
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| 197 | * Validate & get valid root path.
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| 198 | */
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| 199 | AssertPtrReturn(pszFsPath, VERR_INVALID_POINTER);
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| 200 | AssertReturn(*pszFsPath != '\0', VERR_INVALID_PARAMETER);
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| 201 | PRTUTF16 pwszFsRoot;
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| 202 | int rc = rtFsGetRoot(pszFsPath, &pwszFsRoot);
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| 203 | if (RT_FAILURE(rc))
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| 204 | return rc;
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| 205 |
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| 206 | /*
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| 207 | * Free and total.
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| 208 | */
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| 209 | if (pcbTotal || pcbFree)
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| 210 | {
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| 211 | ULARGE_INTEGER cbTotal;
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| 212 | ULARGE_INTEGER cbFree;
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| 213 | if (GetDiskFreeSpaceExW(pwszFsRoot, &cbFree, &cbTotal, NULL))
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| 214 | {
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| 215 | if (pcbTotal)
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| 216 | *pcbTotal = cbTotal.QuadPart;
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| 217 | if (pcbFree)
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| 218 | *pcbFree = cbFree.QuadPart;
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| 219 | }
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| 220 | else
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| 221 | {
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| 222 | DWORD Err = GetLastError();
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| 223 | rc = RTErrConvertFromWin32(Err);
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| 224 | Log(("RTFsQuerySizes(%s,): GetDiskFreeSpaceEx failed with lasterr %d (%Rrc)\n",
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| 225 | pszFsPath, Err, rc));
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| 226 | }
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| 227 | }
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| 228 |
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| 229 | /*
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| 230 | * Block and sector size.
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| 231 | */
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| 232 | if ( RT_SUCCESS(rc)
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| 233 | && (pcbBlock || pcbSector))
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| 234 | {
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| 235 | DWORD dwDummy1, dwDummy2;
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| 236 | DWORD cbSector;
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| 237 | DWORD cSectorsPerCluster;
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| 238 | if (GetDiskFreeSpaceW(pwszFsRoot, &cSectorsPerCluster, &cbSector, &dwDummy1, &dwDummy2))
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| 239 | {
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| 240 | if (pcbBlock)
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| 241 | *pcbBlock = cbSector * cSectorsPerCluster;
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| 242 | if (pcbSector)
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| 243 | *pcbSector = cbSector;
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| 244 | }
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| 245 | else
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| 246 | {
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| 247 | DWORD Err = GetLastError();
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| 248 | rc = RTErrConvertFromWin32(Err);
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| 249 | Log(("RTFsQuerySizes(%s,): GetDiskFreeSpace failed with lasterr %d (%Rrc)\n",
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| 250 | pszFsPath, Err, rc));
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| 251 | }
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| 252 | }
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| 253 |
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| 254 | rtFsFreeRoot(pwszFsRoot);
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| 255 | return rc;
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| 256 | }
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| 257 |
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| 258 |
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| 259 | /**
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| 260 | * Query the serial number of a filesystem.
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| 261 | *
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| 262 | * @returns iprt status code.
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| 263 | * @param pszFsPath Path within the mounted filesystem.
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| 264 | * @param pu32Serial Where to store the serial number.
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| 265 | */
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| 266 | RTR3DECL(int) RTFsQuerySerial(const char *pszFsPath, uint32_t *pu32Serial)
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| 267 | {
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| 268 | /*
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| 269 | * Validate & get valid root path.
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| 270 | */
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| 271 | AssertPtrReturn(pszFsPath, VERR_INVALID_POINTER);
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| 272 | AssertReturn(*pszFsPath != '\0', VERR_INVALID_PARAMETER);
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| 273 | AssertPtrReturn(pu32Serial, VERR_INVALID_POINTER);
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| 274 | PRTUTF16 pwszFsRoot;
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| 275 | int rc = rtFsGetRoot(pszFsPath, &pwszFsRoot);
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| 276 | if (RT_FAILURE(rc))
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| 277 | return rc;
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| 278 |
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| 279 | /*
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| 280 | * Do work.
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| 281 | */
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| 282 | DWORD dwMaxName;
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| 283 | DWORD dwFlags;
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| 284 | DWORD dwSerial;
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| 285 | if (GetVolumeInformationW(pwszFsRoot, NULL, 0, &dwSerial, &dwMaxName, &dwFlags, NULL, 0))
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| 286 | *pu32Serial = dwSerial;
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| 287 | else
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| 288 | {
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| 289 | DWORD Err = GetLastError();
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| 290 | rc = RTErrConvertFromWin32(Err);
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| 291 | Log(("RTFsQuerySizes(%s,): GetDiskFreeSpaceEx failed with lasterr %d (%Rrc)\n",
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| 292 | pszFsPath, Err, rc));
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| 293 | }
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| 294 |
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| 295 | rtFsFreeRoot(pwszFsRoot);
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| 296 | return rc;
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| 297 | }
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| 298 |
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| 299 |
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| 300 | /**
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| 301 | * Query the properties of a mounted filesystem.
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| 302 | *
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| 303 | * @returns iprt status code.
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| 304 | * @param pszFsPath Path within the mounted filesystem.
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| 305 | * @param pProperties Where to store the properties.
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| 306 | */
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| 307 | RTR3DECL(int) RTFsQueryProperties(const char *pszFsPath, PRTFSPROPERTIES pProperties)
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| 308 | {
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| 309 | /*
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| 310 | * Validate & get valid root path.
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| 311 | */
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| 312 | AssertPtrReturn(pszFsPath, VERR_INVALID_POINTER);
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| 313 | AssertReturn(*pszFsPath != '\0', VERR_INVALID_PARAMETER);
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| 314 | AssertPtrReturn(pProperties, VERR_INVALID_POINTER);
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| 315 | PRTUTF16 pwszFsRoot;
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| 316 | int rc = rtFsGetRoot(pszFsPath, &pwszFsRoot);
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| 317 | if (RT_FAILURE(rc))
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| 318 | return rc;
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| 319 |
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| 320 | /*
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| 321 | * Do work.
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| 322 | */
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| 323 | DWORD dwMaxName;
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| 324 | DWORD dwFlags;
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| 325 | DWORD dwSerial;
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| 326 | if (GetVolumeInformationW(pwszFsRoot, NULL, 0, &dwSerial, &dwMaxName, &dwFlags, NULL, 0))
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| 327 | {
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| 328 | memset(pProperties, 0, sizeof(*pProperties));
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| 329 | pProperties->cbMaxComponent = dwMaxName;
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| 330 | pProperties->fFileCompression = !!(dwFlags & FILE_FILE_COMPRESSION);
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| 331 | pProperties->fCompressed = !!(dwFlags & FILE_VOLUME_IS_COMPRESSED);
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| 332 | pProperties->fReadOnly = !!(dwFlags & FILE_READ_ONLY_VOLUME);
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| 333 | pProperties->fSupportsUnicode = !!(dwFlags & FILE_UNICODE_ON_DISK);
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| 334 | pProperties->fCaseSensitive = false; /* win32 is case preserving only */
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| 335 | /** @todo r=bird: What about FILE_CASE_SENSITIVE_SEARCH ? Is this set for NTFS
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| 336 | * as well perchance? If so, better mention it instead of just setting
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| 337 | * fCaseSensitive to false. */
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| 338 | pProperties->fRemote = false; /* no idea yet */
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| 339 | }
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| 340 | else
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| 341 | {
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| 342 | DWORD Err = GetLastError();
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| 343 | rc = RTErrConvertFromWin32(Err);
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| 344 | Log(("RTFsQuerySizes(%s,): GetVolumeInformation failed with lasterr %d (%Rrc)\n",
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| 345 | pszFsPath, Err, rc));
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| 346 | }
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| 347 |
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| 348 | rtFsFreeRoot(pwszFsRoot);
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| 349 | return rc;
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| 350 | }
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| 351 |
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| 352 |
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| 353 | RTR3DECL(bool) RTFsIsCaseSensitive(const char *pszFsPath)
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| 354 | {
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| 355 | return false;
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| 356 | }
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| 357 |
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| 358 |
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| 359 | /**
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| 360 | * Internal helper for comparing a WCHAR string with a char string.
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| 361 | *
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| 362 | * @returns @c true if equal, @c false if not.
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| 363 | * @param pwsz1 The first string.
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| 364 | * @param cch1 The length of the first string, in bytes.
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| 365 | * @param psz2 The second string.
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| 366 | * @param cch2 The length of the second string.
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| 367 | */
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| 368 | static bool rtFsWinAreEqual(WCHAR const *pwsz1, size_t cch1, const char *psz2, size_t cch2)
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| 369 | {
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| 370 | if (cch1 != cch2 * 2)
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| 371 | return false;
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| 372 | while (cch2-- > 0)
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| 373 | {
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| 374 | unsigned ch1 = *pwsz1++;
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| 375 | unsigned ch2 = (unsigned char)*psz2++;
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| 376 | if (ch1 != ch2)
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| 377 | return false;
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| 378 | }
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| 379 | return true;
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| 380 | }
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| 381 |
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| 382 |
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| 383 | RTR3DECL(int) RTFsQueryType(const char *pszFsPath, PRTFSTYPE penmType)
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| 384 | {
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| 385 | *penmType = RTFSTYPE_UNKNOWN;
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| 386 |
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| 387 | AssertPtrReturn(pszFsPath, VERR_INVALID_POINTER);
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| 388 | AssertReturn(*pszFsPath, VERR_INVALID_PARAMETER);
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| 389 |
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| 390 | /*
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| 391 | * Convert the path and try open it.
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| 392 | */
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| 393 | PRTUTF16 pwszFsPath;
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| 394 | int rc = RTPathWinFromUtf8(&pwszFsPath, pszFsPath, 0 /*fFlags*/);
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| 395 | if (RT_SUCCESS(rc))
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| 396 | {
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| 397 | HANDLE hFile = CreateFileW(pwszFsPath,
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| 398 | GENERIC_READ,
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| 399 | FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
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| 400 | NULL,
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| 401 | OPEN_EXISTING,
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| 402 | FILE_FLAG_BACKUP_SEMANTICS,
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| 403 | NULL);
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| 404 | if (hFile != INVALID_HANDLE_VALUE)
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| 405 | {
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| 406 | /*
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| 407 | * Use the NT api directly to get the file system name.
|
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| 408 | */
|
|---|
| 409 | char abBuf[8192];
|
|---|
| 410 | IO_STATUS_BLOCK Ios;
|
|---|
| 411 | NTSTATUS rcNt = NtQueryVolumeInformationFile(hFile, &Ios,
|
|---|
| 412 | abBuf, sizeof(abBuf),
|
|---|
| 413 | FileFsAttributeInformation);
|
|---|
| 414 | if (rcNt >= 0)
|
|---|
| 415 | {
|
|---|
| 416 | PFILE_FS_ATTRIBUTE_INFORMATION pFsAttrInfo = (PFILE_FS_ATTRIBUTE_INFORMATION)abBuf;
|
|---|
| 417 | #define IS_FS(szName) \
|
|---|
| 418 | rtFsWinAreEqual(pFsAttrInfo->FileSystemName, pFsAttrInfo->FileSystemNameLength, szName, sizeof(szName) - 1)
|
|---|
| 419 | if (IS_FS("NTFS"))
|
|---|
| 420 | *penmType = RTFSTYPE_NTFS;
|
|---|
| 421 | else if (IS_FS("FAT"))
|
|---|
| 422 | *penmType = RTFSTYPE_FAT;
|
|---|
| 423 | else if (IS_FS("FAT32"))
|
|---|
| 424 | *penmType = RTFSTYPE_FAT;
|
|---|
| 425 | else if (IS_FS("EXFAT"))
|
|---|
| 426 | *penmType = RTFSTYPE_EXFAT;
|
|---|
| 427 | else if (IS_FS("VBoxSharedFolderFS"))
|
|---|
| 428 | *penmType = RTFSTYPE_VBOXSHF;
|
|---|
| 429 | #undef IS_FS
|
|---|
| 430 | }
|
|---|
| 431 | else
|
|---|
| 432 | rc = RTErrConvertFromNtStatus(rcNt);
|
|---|
| 433 | CloseHandle(hFile);
|
|---|
| 434 | }
|
|---|
| 435 | else
|
|---|
| 436 | rc = RTErrConvertFromWin32(GetLastError());
|
|---|
| 437 | RTPathWinFree(pwszFsPath);
|
|---|
| 438 | }
|
|---|
| 439 | return rc;
|
|---|
| 440 | }
|
|---|
