[41094] | 1 | /* $Id: dvmvfs.cpp 100908 2023-08-19 02:57:05Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT Disk Volume Management API (DVM) - VFS glue.
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| 4 | */
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| 5 |
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| 6 | /*
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[98103] | 7 | * Copyright (C) 2012-2023 Oracle and/or its affiliates.
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[41094] | 8 | *
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[96407] | 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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[41094] | 11 | *
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[96407] | 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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[41094] | 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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[96407] | 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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[41094] | 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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[96407] | 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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[41094] | 35 | */
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| 36 |
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| 37 |
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[57358] | 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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[69609] | 41 | #define LOG_GROUP RTLOGGROUP_FS /** @todo fix log group */
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[41094] | 42 | #include <iprt/types.h>
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| 43 | #include <iprt/assert.h>
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| 44 | #include <iprt/mem.h>
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| 45 | #include <iprt/dvm.h>
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| 46 | #include <iprt/err.h>
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| 47 | #include <iprt/asm.h>
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| 48 | #include <iprt/string.h>
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| 49 | #include <iprt/file.h>
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| 50 | #include <iprt/sg.h>
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| 51 | #include <iprt/vfslowlevel.h>
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| 52 | #include <iprt/poll.h>
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[69609] | 53 | #include <iprt/log.h>
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[41094] | 54 | #include "internal/dvm.h"
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| 55 |
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| 56 |
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[57358] | 57 | /*********************************************************************************************************************************
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| 58 | * Structures and Typedefs *
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| 59 | *********************************************************************************************************************************/
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[73156] | 60 | /** Pointer to a volume manager VFS. */
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| 61 | typedef struct RTDVMVFSVOL *PRTDVMVFSVOL;
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| 62 |
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[41094] | 63 | /**
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[73156] | 64 | * The internal data of a DVM volume I/O stream.
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[69609] | 65 | */
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[73156] | 66 | typedef struct RTVFSDVMFILE
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[69609] | 67 | {
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[73156] | 68 | /** The volume the VFS file belongs to. */
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| 69 | RTDVMVOLUME hVol;
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| 70 | /** Pointer to the VFS volume. Can be NULL. */
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| 71 | PRTDVMVFSVOL pVfsVol;
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| 72 | /** Current position. */
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| 73 | uint64_t offCurPos;
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| 74 | /** Set if readable. */
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| 75 | bool fCanRead;
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| 76 | /** Set if writable. */
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| 77 | bool fCanWrite;
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| 78 | } RTVFSDVMFILE;
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| 79 | /** Pointer to a the internal data of a DVM volume file. */
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| 80 | typedef RTVFSDVMFILE *PRTVFSDVMFILE;
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| 81 |
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| 82 | /**
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| 83 | * The internal data of a DVM volume symlink.
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| 84 | */
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| 85 | typedef struct RTVFSDVMSYMLINK
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| 86 | {
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| 87 | /** The DVM volume the symlink represent. */
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| 88 | RTDVMVOLUME hVol;
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| 89 | /** The DVM volume manager @a hVol belongs to. */
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[69616] | 90 | RTDVM hVolMgr;
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[73156] | 91 | /** The symlink name. */
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| 92 | char *pszSymlink;
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| 93 | /** The symlink target (volXX). */
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| 94 | char szTarget[16];
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| 95 | } RTVFSDVMSYMLINK;
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| 96 | /** Pointer to a the internal data of a DVM volume file. */
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| 97 | typedef RTVFSDVMSYMLINK *PRTVFSDVMSYMLINK;
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[41094] | 98 |
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| 99 | /**
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[69616] | 100 | * The volume manager VFS (root) dir data.
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[69609] | 101 | */
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[69616] | 102 | typedef struct RTDVMVFSDIR
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[69609] | 103 | {
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| 104 | /** Pointer to the VFS volume. */
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| 105 | PRTDVMVFSVOL pVfsVol;
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| 106 | /** The current directory offset. */
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| 107 | uint32_t offDir;
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[69616] | 108 | /** Set if we need to try return hCurVolume again because of buffer overflow. */
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| 109 | bool fReturnCurrent;
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[73156] | 110 | /** Pointer to name alias string (returned by RTDvmVolumeQueryName, free it). */
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| 111 | char *pszNameAlias;
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[69616] | 112 | /** The current DVM volume. */
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| 113 | RTDVMVOLUME hCurVolume;
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| 114 | } RTDVMVFSDIR;
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[73156] | 115 | /** Pointer to a volume manager VFS (root) dir. */
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[69616] | 116 | typedef RTDVMVFSDIR *PRTDVMVFSDIR;
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[69609] | 117 |
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[69616] | 118 | /**
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[73156] | 119 | * A volume manager VFS for use in chains (thing pseudo/devfs).
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[69616] | 120 | */
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[73156] | 121 | typedef struct RTDVMVFSVOL
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[69616] | 122 | {
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[73156] | 123 | /** The volume manager. */
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| 124 | RTDVM hVolMgr;
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| 125 | /** Whether to close it on success. */
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| 126 | bool fCloseDvm;
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| 127 | /** Whether the access is read-only. */
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| 128 | bool fReadOnly;
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| 129 | /** Number of volumes. */
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| 130 | uint32_t cVolumes;
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| 131 | /** Self reference. */
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| 132 | RTVFS hVfsSelf;
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| 133 | } RTDVMVFSVOL;
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[69609] | 134 |
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[69616] | 135 |
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[69828] | 136 | /*********************************************************************************************************************************
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| 137 | * Internal Functions *
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| 138 | *********************************************************************************************************************************/
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| 139 | static DECLCALLBACK(int) rtDvmVfsVol_OpenRoot(void *pvThis, PRTVFSDIR phVfsDir);
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| 140 |
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| 141 |
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[69609] | 142 | /**
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[41094] | 143 | * @interface_method_impl{RTVFSOBJOPS,pfnClose}
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| 144 | */
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| 145 | static DECLCALLBACK(int) rtDvmVfsFile_Close(void *pvThis)
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| 146 | {
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| 147 | PRTVFSDVMFILE pThis = (PRTVFSDVMFILE)pvThis;
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| 148 |
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| 149 | RTDvmVolumeRelease(pThis->hVol);
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| 150 | return VINF_SUCCESS;
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| 151 | }
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| 152 |
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| 153 |
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| 154 | /**
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[73156] | 155 | * Worker for rtDvmVfsFile_QueryInfoWorker and rtDvmVfsSym_QueryInfoWorker.
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[69616] | 156 | */
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[73156] | 157 | static int rtDvmVfsFileSym_QueryAddAttrWorker(RTDVMVOLUME hVolume, RTDVM hVolMgr,
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| 158 | PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr)
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[69616] | 159 | {
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| 160 | switch (enmAddAttr)
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| 161 | {
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| 162 | case RTFSOBJATTRADD_NOTHING:
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| 163 | case RTFSOBJATTRADD_UNIX:
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| 164 | pObjInfo->Attr.u.Unix.uid = (RTUID)RTDvmVolumeGetType(hVolume);
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| 165 | pObjInfo->Attr.u.Unix.gid = hVolMgr != NIL_RTDVM ? (RTGID)RTDvmMapGetFormatType(hVolMgr) : NIL_RTGID;
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| 166 | pObjInfo->Attr.u.Unix.cHardlinks = 1;
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| 167 | pObjInfo->Attr.u.Unix.INodeIdDevice = 0;
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| 168 | pObjInfo->Attr.u.Unix.INodeId = 0;
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| 169 | pObjInfo->Attr.u.Unix.fFlags = 0;
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| 170 | pObjInfo->Attr.u.Unix.GenerationId = 0;
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| 171 | pObjInfo->Attr.u.Unix.Device = 0;
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| 172 | break;
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| 173 |
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| 174 | case RTFSOBJATTRADD_UNIX_OWNER:
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| 175 | {
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| 176 | RTDVMVOLTYPE enmType = RTDvmVolumeGetType(hVolume);
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| 177 | pObjInfo->Attr.u.UnixOwner.uid = (RTUID)enmType;
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| 178 | RTStrCopy(pObjInfo->Attr.u.UnixOwner.szName, sizeof(pObjInfo->Attr.u.UnixOwner.szName),
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| 179 | RTDvmVolumeTypeGetDescr(enmType));
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| 180 | break;
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| 181 | }
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| 182 |
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| 183 | case RTFSOBJATTRADD_UNIX_GROUP:
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| 184 | if (hVolMgr != NIL_RTDVM)
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| 185 | {
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| 186 | pObjInfo->Attr.u.UnixGroup.gid = (RTGID)RTDvmMapGetFormatType(hVolMgr);
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| 187 | RTStrCopy(pObjInfo->Attr.u.UnixGroup.szName, sizeof(pObjInfo->Attr.u.UnixGroup.szName),
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| 188 | RTDvmMapGetFormatName(hVolMgr));
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| 189 | }
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| 190 | else
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| 191 | {
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| 192 | pObjInfo->Attr.u.UnixGroup.gid = NIL_RTGID;
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| 193 | pObjInfo->Attr.u.UnixGroup.szName[0] = '\0';
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| 194 | }
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| 195 | break;
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| 196 |
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| 197 | case RTFSOBJATTRADD_EASIZE:
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| 198 | pObjInfo->Attr.u.EASize.cb = 0;
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| 199 | break;
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| 200 |
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| 201 | default:
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| 202 | return VERR_INVALID_PARAMETER;
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| 203 | }
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| 204 | return VINF_SUCCESS;
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| 205 | }
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| 206 |
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| 207 |
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| 208 | /**
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[73156] | 209 | * Worker for rtDvmVfsFile_QueryInfo, rtDvmVfsDir_QueryEntryInfo, and
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| 210 | * rtDvmVfsDir_ReadDir.
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| 211 | */
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| 212 | static int rtDvmVfsFile_QueryInfoWorker(RTDVMVOLUME hVolume, RTDVM hVolMgr, bool fReadOnly,
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| 213 | PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr)
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| 214 | {
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| 215 |
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| 216 | pObjInfo->cbObject = RTDvmVolumeGetSize(hVolume);
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| 217 | pObjInfo->cbAllocated = pObjInfo->cbObject;
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| 218 | RTTimeSpecSetNano(&pObjInfo->AccessTime, 0);
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| 219 | RTTimeSpecSetNano(&pObjInfo->ModificationTime, 0);
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| 220 | RTTimeSpecSetNano(&pObjInfo->ChangeTime, 0);
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| 221 | RTTimeSpecSetNano(&pObjInfo->BirthTime, 0);
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| 222 | pObjInfo->Attr.fMode = RTFS_TYPE_FILE | RTFS_DOS_NT_NORMAL;
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| 223 | if (fReadOnly)
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| 224 | pObjInfo->Attr.fMode |= RTFS_DOS_READONLY | 0444;
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| 225 | else
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| 226 | pObjInfo->Attr.fMode |= 0666;
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| 227 |
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| 228 | return rtDvmVfsFileSym_QueryAddAttrWorker(hVolume, hVolMgr, pObjInfo, enmAddAttr);
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| 229 | }
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| 230 |
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| 231 |
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| 232 | /**
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[41094] | 233 | * @interface_method_impl{RTVFSOBJOPS,pfnQueryInfo}
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| 234 | */
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| 235 | static DECLCALLBACK(int) rtDvmVfsFile_QueryInfo(void *pvThis, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr)
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| 236 | {
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[69616] | 237 | PRTVFSDVMFILE pThis = (PRTVFSDVMFILE)pvThis;
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| 238 | return rtDvmVfsFile_QueryInfoWorker(pThis->hVol,
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| 239 | pThis->pVfsVol ? pThis->pVfsVol->hVolMgr : NIL_RTDVM,
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| 240 | pThis->pVfsVol ? pThis->pVfsVol->fReadOnly : !pThis->fCanWrite,
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| 241 | pObjInfo, enmAddAttr);
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[41094] | 242 | }
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| 243 |
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| 244 |
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| 245 | /**
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| 246 | * @interface_method_impl{RTVFSIOSTREAMOPS,pfnRead}
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| 247 | */
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[100908] | 248 | static DECLCALLBACK(int) rtDvmVfsFile_Read(void *pvThis, RTFOFF off, PRTSGBUF pSgBuf, bool fBlocking, size_t *pcbRead)
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[41094] | 249 | {
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[100908] | 250 | PRTVFSDVMFILE const pThis = (PRTVFSDVMFILE)pvThis;
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[41094] | 251 |
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| 252 | Assert(pSgBuf->cSegs == 1);
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| 253 | NOREF(fBlocking);
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| 254 |
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| 255 | /*
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| 256 | * Find the current position and check if it's within the volume.
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| 257 | */
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[100908] | 258 | uint64_t const cbVol = RTDvmVolumeGetSize(pThis->hVol);
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[41094] | 259 | uint64_t offUnsigned = off < 0 ? pThis->offCurPos : (uint64_t)off;
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[100908] | 260 | if (offUnsigned >= cbVol)
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[41094] | 261 | {
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| 262 | if (pcbRead)
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| 263 | {
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| 264 | *pcbRead = 0;
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| 265 | pThis->offCurPos = offUnsigned;
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| 266 | return VINF_EOF;
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| 267 | }
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| 268 | return VERR_EOF;
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| 269 | }
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| 270 |
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[100908] | 271 | size_t cbSeg = 0;
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| 272 | void * const pvSeg = RTSgBufGetCurrentSegment(pSgBuf, ~(size_t)0, &cbSeg);
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| 273 |
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| 274 | int rcRet = VINF_SUCCESS;
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| 275 | size_t cbToRead;
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| 276 | if (cbSeg <= cbVol - offUnsigned)
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| 277 | cbToRead = cbSeg;
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| 278 | else if (pcbRead)
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[41094] | 279 | {
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[100908] | 280 | rcRet = VINF_EOF;
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| 281 | cbToRead = (size_t)(cbVol - offUnsigned);
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[41094] | 282 | }
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| 283 | else
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[100908] | 284 | return VERR_EOF;
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[41094] | 285 |
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| 286 | /*
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| 287 | * Ok, we've got a valid stretch within the file. Do the reading.
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| 288 | */
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[100908] | 289 | if (cbToRead > 0)
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[41094] | 290 | {
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[100908] | 291 | int rc2 = RTDvmVolumeRead(pThis->hVol, offUnsigned, pvSeg, cbToRead);
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| 292 | if (RT_SUCCESS(rc2))
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| 293 | {
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| 294 | offUnsigned += cbToRead;
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| 295 | RTSgBufAdvance(pSgBuf, cbToRead);
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| 296 | }
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| 297 | else
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| 298 | {
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| 299 | cbToRead = 0;
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| 300 | rcRet = rc2;
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| 301 | }
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[41094] | 302 | }
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| 303 |
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| 304 | pThis->offCurPos = offUnsigned;
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[100908] | 305 | if (pcbRead)
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| 306 | *pcbRead = cbToRead;
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| 307 | return rcRet;
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[41094] | 308 | }
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| 309 |
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| 310 |
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| 311 | /**
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| 312 | * @interface_method_impl{RTVFSIOSTREAMOPS,pfnWrite}
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| 313 | */
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[100908] | 314 | static DECLCALLBACK(int) rtDvmVfsFile_Write(void *pvThis, RTFOFF off, PRTSGBUF pSgBuf, bool fBlocking, size_t *pcbWritten)
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[41094] | 315 | {
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[100908] | 316 | PRTVFSDVMFILE const pThis = (PRTVFSDVMFILE)pvThis;
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[41094] | 317 |
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| 318 | Assert(pSgBuf->cSegs == 1);
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| 319 | NOREF(fBlocking);
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| 320 |
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| 321 | /*
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| 322 | * Find the current position and check if it's within the volume.
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| 323 | * Writing beyond the end of a volume is not supported.
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| 324 | */
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[100908] | 325 | uint64_t const cbVol = RTDvmVolumeGetSize(pThis->hVol);
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[41094] | 326 | uint64_t offUnsigned = off < 0 ? pThis->offCurPos : (uint64_t)off;
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[100908] | 327 | if (offUnsigned >= cbVol)
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[41094] | 328 | {
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| 329 | if (pcbWritten)
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| 330 | {
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| 331 | *pcbWritten = 0;
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| 332 | pThis->offCurPos = offUnsigned;
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| 333 | }
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[100908] | 334 | return VERR_DISK_FULL; /** @todo VERR_DISK_FULL is not the best status code. */
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[41094] | 335 | }
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| 336 |
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[100908] | 337 | size_t cbSeg = 0;
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| 338 | void * const pvSeg = RTSgBufGetCurrentSegment(pSgBuf, ~(size_t)0, &cbSeg);
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| 339 |
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| 340 | size_t cbToWrite;
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| 341 | if (cbSeg <= cbVol - offUnsigned)
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| 342 | cbToWrite = cbSeg;
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| 343 | else if (pcbWritten)
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| 344 | cbToWrite = (size_t)(cbVol - offUnsigned);
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[41094] | 345 | else
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[100908] | 346 | return VERR_EOF; /** @todo status to use above? or rather use VERR_DISK_FULL? */
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[41094] | 347 |
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| 348 | /*
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| 349 | * Ok, we've got a valid stretch within the file. Do the reading.
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| 350 | */
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[100908] | 351 | int rc = VINF_SUCCESS;
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| 352 | if (cbToWrite > 0)
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[41094] | 353 | {
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[100908] | 354 | rc = RTDvmVolumeWrite(pThis->hVol, offUnsigned, pvSeg, cbToWrite);
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[41094] | 355 | if (RT_SUCCESS(rc))
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[100908] | 356 | {
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| 357 | offUnsigned += cbToWrite;
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| 358 | RTSgBufAdvance(pSgBuf, cbToWrite);
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| 359 | }
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| 360 | else
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| 361 | cbToWrite = 0;
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[41094] | 362 | }
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| 363 |
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| 364 | pThis->offCurPos = offUnsigned;
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[100908] | 365 | if (pcbWritten)
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| 366 | *pcbWritten = cbToWrite;
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[41094] | 367 | return rc;
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| 368 | }
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| 369 |
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| 370 |
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| 371 | /**
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| 372 | * @interface_method_impl{RTVFSIOSTREAMOPS,pfnFlush}
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| 373 | */
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| 374 | static DECLCALLBACK(int) rtDvmVfsFile_Flush(void *pvThis)
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| 375 | {
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| 376 | NOREF(pvThis);
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[63561] | 377 | return VINF_SUCCESS; /** @todo Implement missing DVM API. */
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[41094] | 378 | }
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| 379 |
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| 380 |
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| 381 | /**
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| 382 | * @interface_method_impl{RTVFSIOSTREAMOPS,pfnTell}
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| 383 | */
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| 384 | static DECLCALLBACK(int) rtDvmVfsFile_Tell(void *pvThis, PRTFOFF poffActual)
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| 385 | {
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| 386 | PRTVFSDVMFILE pThis = (PRTVFSDVMFILE)pvThis;
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| 387 | *poffActual = pThis->offCurPos;
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| 388 | return VINF_SUCCESS;
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| 389 | }
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| 390 |
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| 391 |
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| 392 | /**
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| 393 | * @interface_method_impl{RTVFSOBJSETOPS,pfnMode}
|
---|
| 394 | */
|
---|
| 395 | static DECLCALLBACK(int) rtDvmVfsFile_SetMode(void *pvThis, RTFMODE fMode, RTFMODE fMask)
|
---|
| 396 | {
|
---|
| 397 | NOREF(pvThis);
|
---|
| 398 | NOREF(fMode);
|
---|
| 399 | NOREF(fMask);
|
---|
| 400 | return VERR_NOT_SUPPORTED;
|
---|
| 401 | }
|
---|
| 402 |
|
---|
| 403 |
|
---|
| 404 | /**
|
---|
| 405 | * @interface_method_impl{RTVFSOBJSETOPS,pfnSetTimes}
|
---|
| 406 | */
|
---|
| 407 | static DECLCALLBACK(int) rtDvmVfsFile_SetTimes(void *pvThis, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
|
---|
| 408 | PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime)
|
---|
| 409 | {
|
---|
| 410 | NOREF(pvThis);
|
---|
| 411 | NOREF(pAccessTime);
|
---|
| 412 | NOREF(pModificationTime);
|
---|
| 413 | NOREF(pChangeTime);
|
---|
| 414 | NOREF(pBirthTime);
|
---|
| 415 | return VERR_NOT_SUPPORTED;
|
---|
| 416 | }
|
---|
| 417 |
|
---|
| 418 |
|
---|
| 419 | /**
|
---|
| 420 | * @interface_method_impl{RTVFSOBJSETOPS,pfnSetOwner}
|
---|
| 421 | */
|
---|
| 422 | static DECLCALLBACK(int) rtDvmVfsFile_SetOwner(void *pvThis, RTUID uid, RTGID gid)
|
---|
| 423 | {
|
---|
| 424 | NOREF(pvThis);
|
---|
| 425 | NOREF(uid);
|
---|
| 426 | NOREF(gid);
|
---|
| 427 | return VERR_NOT_SUPPORTED;
|
---|
| 428 | }
|
---|
| 429 |
|
---|
| 430 |
|
---|
| 431 | /**
|
---|
| 432 | * @interface_method_impl{RTVFSFILEOPS,pfnSeek}
|
---|
| 433 | */
|
---|
| 434 | static DECLCALLBACK(int) rtDvmVfsFile_Seek(void *pvThis, RTFOFF offSeek, unsigned uMethod, PRTFOFF poffActual)
|
---|
| 435 | {
|
---|
| 436 | PRTVFSDVMFILE pThis = (PRTVFSDVMFILE)pvThis;
|
---|
| 437 |
|
---|
| 438 | /*
|
---|
| 439 | * Seek relative to which position.
|
---|
| 440 | */
|
---|
| 441 | uint64_t offWrt;
|
---|
| 442 | switch (uMethod)
|
---|
| 443 | {
|
---|
| 444 | case RTFILE_SEEK_BEGIN:
|
---|
| 445 | offWrt = 0;
|
---|
| 446 | break;
|
---|
| 447 |
|
---|
| 448 | case RTFILE_SEEK_CURRENT:
|
---|
| 449 | offWrt = pThis->offCurPos;
|
---|
| 450 | break;
|
---|
| 451 |
|
---|
| 452 | case RTFILE_SEEK_END:
|
---|
| 453 | offWrt = RTDvmVolumeGetSize(pThis->hVol);
|
---|
| 454 | break;
|
---|
| 455 |
|
---|
| 456 | default:
|
---|
| 457 | return VERR_INTERNAL_ERROR_5;
|
---|
| 458 | }
|
---|
| 459 |
|
---|
| 460 | /*
|
---|
| 461 | * Calc new position, take care to stay within bounds.
|
---|
| 462 | *
|
---|
| 463 | * @todo: Setting position beyond the end of the volume does not make sense.
|
---|
| 464 | */
|
---|
| 465 | uint64_t offNew;
|
---|
| 466 | if (offSeek == 0)
|
---|
| 467 | offNew = offWrt;
|
---|
| 468 | else if (offSeek > 0)
|
---|
| 469 | {
|
---|
| 470 | offNew = offWrt + offSeek;
|
---|
| 471 | if ( offNew < offWrt
|
---|
| 472 | || offNew > RTFOFF_MAX)
|
---|
| 473 | offNew = RTFOFF_MAX;
|
---|
| 474 | }
|
---|
| 475 | else if ((uint64_t)-offSeek < offWrt)
|
---|
| 476 | offNew = offWrt + offSeek;
|
---|
| 477 | else
|
---|
| 478 | offNew = 0;
|
---|
| 479 |
|
---|
| 480 | /*
|
---|
| 481 | * Update the state and set return value.
|
---|
| 482 | */
|
---|
| 483 | pThis->offCurPos = offNew;
|
---|
| 484 |
|
---|
| 485 | *poffActual = offNew;
|
---|
| 486 | return VINF_SUCCESS;
|
---|
| 487 | }
|
---|
| 488 |
|
---|
| 489 |
|
---|
| 490 | /**
|
---|
| 491 | * @interface_method_impl{RTVFSFILEOPS,pfnQuerySize}
|
---|
| 492 | */
|
---|
| 493 | static DECLCALLBACK(int) rtDvmVfsFile_QuerySize(void *pvThis, uint64_t *pcbFile)
|
---|
| 494 | {
|
---|
| 495 | PRTVFSDVMFILE pThis = (PRTVFSDVMFILE)pvThis;
|
---|
| 496 | *pcbFile = RTDvmVolumeGetSize(pThis->hVol);
|
---|
| 497 | return VINF_SUCCESS;
|
---|
| 498 | }
|
---|
| 499 |
|
---|
| 500 |
|
---|
| 501 | /**
|
---|
| 502 | * Standard file operations.
|
---|
| 503 | */
|
---|
| 504 | DECL_HIDDEN_CONST(const RTVFSFILEOPS) g_rtDvmVfsStdFileOps =
|
---|
| 505 | {
|
---|
| 506 | { /* Stream */
|
---|
| 507 | { /* Obj */
|
---|
| 508 | RTVFSOBJOPS_VERSION,
|
---|
| 509 | RTVFSOBJTYPE_FILE,
|
---|
| 510 | "DvmFile",
|
---|
| 511 | rtDvmVfsFile_Close,
|
---|
| 512 | rtDvmVfsFile_QueryInfo,
|
---|
[94291] | 513 | NULL,
|
---|
[41094] | 514 | RTVFSOBJOPS_VERSION
|
---|
| 515 | },
|
---|
| 516 | RTVFSIOSTREAMOPS_VERSION,
|
---|
| 517 | RTVFSIOSTREAMOPS_FEAT_NO_SG,
|
---|
| 518 | rtDvmVfsFile_Read,
|
---|
| 519 | rtDvmVfsFile_Write,
|
---|
| 520 | rtDvmVfsFile_Flush,
|
---|
[69942] | 521 | NULL /*pfnPollOne*/,
|
---|
[41094] | 522 | rtDvmVfsFile_Tell,
|
---|
| 523 | NULL /*Skip*/,
|
---|
| 524 | NULL /*ZeroFill*/,
|
---|
| 525 | RTVFSIOSTREAMOPS_VERSION,
|
---|
| 526 | },
|
---|
| 527 | RTVFSFILEOPS_VERSION,
|
---|
| 528 | /*RTVFSIOFILEOPS_FEAT_NO_AT_OFFSET*/ 0,
|
---|
| 529 | { /* ObjSet */
|
---|
| 530 | RTVFSOBJSETOPS_VERSION,
|
---|
[73097] | 531 | RT_UOFFSETOF(RTVFSFILEOPS, ObjSet) - RT_UOFFSETOF(RTVFSFILEOPS, Stream.Obj),
|
---|
[41094] | 532 | rtDvmVfsFile_SetMode,
|
---|
| 533 | rtDvmVfsFile_SetTimes,
|
---|
| 534 | rtDvmVfsFile_SetOwner,
|
---|
| 535 | RTVFSOBJSETOPS_VERSION
|
---|
| 536 | },
|
---|
| 537 | rtDvmVfsFile_Seek,
|
---|
| 538 | rtDvmVfsFile_QuerySize,
|
---|
[69977] | 539 | NULL /*SetSize*/,
|
---|
| 540 | NULL /*QueryMaxSize*/,
|
---|
[41094] | 541 | RTVFSFILEOPS_VERSION
|
---|
| 542 | };
|
---|
| 543 |
|
---|
| 544 |
|
---|
[69616] | 545 | /**
|
---|
| 546 | * Internal worker for RTDvmVolumeCreateVfsFile and rtDvmVfsDir_OpenFile.
|
---|
| 547 | *
|
---|
| 548 | * @returns IPRT status code.
|
---|
| 549 | * @param pVfsVol The VFS volume, optional.
|
---|
| 550 | * @param hVol The volume handle. (Reference not consumed.)
|
---|
| 551 | * @param fOpen RTFILE_O_XXX (valid).
|
---|
| 552 | * @param phVfsFileOut Where to return the handle to the file.
|
---|
| 553 | */
|
---|
| 554 | static int rtDvmVfsCreateFileForVolume(PRTDVMVFSVOL pVfsVol, RTDVMVOLUME hVol, uint64_t fOpen, PRTVFSFILE phVfsFileOut)
|
---|
[41094] | 555 | {
|
---|
| 556 | uint32_t cRefs = RTDvmVolumeRetain(hVol);
|
---|
| 557 | AssertReturn(cRefs != UINT32_MAX, VERR_INVALID_HANDLE);
|
---|
| 558 |
|
---|
| 559 | /*
|
---|
| 560 | * Create the volume file.
|
---|
| 561 | */
|
---|
| 562 | RTVFSFILE hVfsFile;
|
---|
| 563 | PRTVFSDVMFILE pThis;
|
---|
[69616] | 564 | int rc = RTVfsNewFile(&g_rtDvmVfsStdFileOps, sizeof(*pThis), fOpen, NIL_RTVFS, NIL_RTVFSLOCK, &hVfsFile, (void **)&pThis);
|
---|
[41094] | 565 | if (RT_SUCCESS(rc))
|
---|
| 566 | {
|
---|
| 567 | pThis->offCurPos = 0;
|
---|
| 568 | pThis->hVol = hVol;
|
---|
[69616] | 569 | pThis->fCanRead = RT_BOOL(fOpen & RTFILE_O_READ);
|
---|
| 570 | pThis->fCanWrite = RT_BOOL(fOpen & RTFILE_O_WRITE);
|
---|
| 571 | pThis->pVfsVol = pVfsVol;
|
---|
[41094] | 572 |
|
---|
| 573 | *phVfsFileOut = hVfsFile;
|
---|
| 574 | return VINF_SUCCESS;
|
---|
| 575 | }
|
---|
[69616] | 576 |
|
---|
| 577 | RTDvmVolumeRelease(hVol);
|
---|
| 578 | return rc;
|
---|
| 579 | }
|
---|
| 580 |
|
---|
| 581 |
|
---|
| 582 | RTDECL(int) RTDvmVolumeCreateVfsFile(RTDVMVOLUME hVol, uint64_t fOpen, PRTVFSFILE phVfsFileOut)
|
---|
| 583 | {
|
---|
| 584 | AssertPtrReturn(hVol, VERR_INVALID_HANDLE);
|
---|
| 585 | AssertPtrReturn(phVfsFileOut, VERR_INVALID_POINTER);
|
---|
| 586 | AssertReturn(fOpen & RTFILE_O_ACCESS_MASK, VERR_INVALID_FLAGS);
|
---|
| 587 | AssertReturn(!(fOpen & ~RTFILE_O_VALID_MASK), VERR_INVALID_FLAGS);
|
---|
| 588 | return rtDvmVfsCreateFileForVolume(NULL, hVol, fOpen, phVfsFileOut);
|
---|
| 589 | }
|
---|
| 590 |
|
---|
| 591 |
|
---|
[73156] | 592 | /*********************************************************************************************************************************
|
---|
| 593 | * DVM Symbolic Link Objects *
|
---|
| 594 | *********************************************************************************************************************************/
|
---|
[69616] | 595 | /**
|
---|
| 596 | * @interface_method_impl{RTVFSOBJOPS,pfnClose}
|
---|
| 597 | */
|
---|
[73156] | 598 | static DECLCALLBACK(int) rtDvmVfsSym_Close(void *pvThis)
|
---|
| 599 | {
|
---|
| 600 | PRTVFSDVMSYMLINK pThis = (PRTVFSDVMSYMLINK)pvThis;
|
---|
| 601 | if (pThis->pszSymlink)
|
---|
| 602 | {
|
---|
| 603 | RTStrFree(pThis->pszSymlink);
|
---|
| 604 | pThis->pszSymlink = NULL;
|
---|
| 605 | }
|
---|
| 606 | if (pThis->hVol != NIL_RTDVMVOLUME)
|
---|
| 607 | {
|
---|
| 608 | RTDvmVolumeRelease(pThis->hVol);
|
---|
| 609 | pThis->hVol = NIL_RTDVMVOLUME;
|
---|
| 610 | }
|
---|
| 611 | if (pThis->hVolMgr != NIL_RTDVM)
|
---|
| 612 | {
|
---|
| 613 | RTDvmRelease(pThis->hVolMgr);
|
---|
| 614 | pThis->hVolMgr = NIL_RTDVM;
|
---|
| 615 | }
|
---|
| 616 | return VINF_SUCCESS;
|
---|
| 617 | }
|
---|
| 618 |
|
---|
| 619 |
|
---|
| 620 | /**
|
---|
| 621 | * Worker for rtDvmVfsSym_QueryInfo and rtDvmVfsDir_Read.
|
---|
| 622 | *
|
---|
| 623 | * @returns IPRT status code.
|
---|
| 624 | * @param hVolume The volume handle.
|
---|
| 625 | * @param hVolMgr The volume manager handle. Optional.
|
---|
| 626 | * @param pszTarget The link target.
|
---|
| 627 | * @param pObjInfo The object info structure to populate.
|
---|
| 628 | * @param enmAddAttr The additional attributes to supply.
|
---|
| 629 | */
|
---|
| 630 | static int rtDvmVfsSym_QueryInfoWorker(RTDVMVOLUME hVolume, RTDVM hVolMgr, const char *pszTarget,
|
---|
| 631 | PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr)
|
---|
| 632 | {
|
---|
| 633 | RT_ZERO(*pObjInfo);
|
---|
| 634 | pObjInfo->cbObject = pObjInfo->cbAllocated = pszTarget ? strlen(pszTarget) : 0;
|
---|
| 635 | pObjInfo->Attr.fMode = 0777 | RTFS_TYPE_SYMLINK | RTFS_DOS_NT_REPARSE_POINT;
|
---|
| 636 |
|
---|
| 637 | return rtDvmVfsFileSym_QueryAddAttrWorker(hVolume, hVolMgr, pObjInfo, enmAddAttr);
|
---|
| 638 | }
|
---|
| 639 |
|
---|
| 640 |
|
---|
| 641 | /**
|
---|
| 642 | * @interface_method_impl{RTVFSOBJOPS,pfnQueryInfo}
|
---|
| 643 | */
|
---|
| 644 | static DECLCALLBACK(int) rtDvmVfsSym_QueryInfo(void *pvThis, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr)
|
---|
| 645 | {
|
---|
| 646 | PRTVFSDVMSYMLINK pThis = (PRTVFSDVMSYMLINK)pvThis;
|
---|
| 647 | return rtDvmVfsSym_QueryInfoWorker(pThis->hVol, pThis->hVolMgr, pThis->szTarget, pObjInfo, enmAddAttr);
|
---|
| 648 | }
|
---|
| 649 |
|
---|
| 650 |
|
---|
| 651 | /**
|
---|
| 652 | * @interface_method_impl{RTVFSSYMLINKOPS,pfnRead}
|
---|
| 653 | */
|
---|
| 654 | static DECLCALLBACK(int) rtDvmVfsSym_Read(void *pvThis, char *pszTarget, size_t cbTarget)
|
---|
| 655 | {
|
---|
| 656 | PRTVFSDVMSYMLINK pThis = (PRTVFSDVMSYMLINK)pvThis;
|
---|
| 657 | return RTStrCopy(pszTarget, cbTarget, pThis->szTarget);
|
---|
| 658 | }
|
---|
| 659 |
|
---|
| 660 |
|
---|
| 661 | /**
|
---|
| 662 | * DVM symbolic link operations.
|
---|
| 663 | */
|
---|
| 664 | static const RTVFSSYMLINKOPS g_rtDvmVfsSymOps =
|
---|
| 665 | {
|
---|
| 666 | { /* Obj */
|
---|
| 667 | RTVFSOBJOPS_VERSION,
|
---|
| 668 | RTVFSOBJTYPE_SYMLINK,
|
---|
| 669 | "DvmSymlink",
|
---|
| 670 | rtDvmVfsSym_Close,
|
---|
| 671 | rtDvmVfsSym_QueryInfo,
|
---|
[94291] | 672 | NULL,
|
---|
[73156] | 673 | RTVFSOBJOPS_VERSION
|
---|
| 674 | },
|
---|
| 675 | RTVFSSYMLINKOPS_VERSION,
|
---|
| 676 | 0,
|
---|
| 677 | { /* ObjSet */
|
---|
| 678 | RTVFSOBJSETOPS_VERSION,
|
---|
| 679 | RT_UOFFSETOF(RTVFSSYMLINKOPS, ObjSet) - RT_UOFFSETOF(RTVFSSYMLINKOPS, Obj),
|
---|
| 680 | NULL /*rtDvmVfsSym_SetMode*/,
|
---|
| 681 | NULL /*rtDvmVfsSym_SetTimes*/,
|
---|
| 682 | NULL /*rtDvmVfsSym_SetOwner*/,
|
---|
| 683 | RTVFSOBJSETOPS_VERSION
|
---|
| 684 | },
|
---|
| 685 | rtDvmVfsSym_Read,
|
---|
| 686 | RTVFSSYMLINKOPS_VERSION
|
---|
| 687 | };
|
---|
| 688 |
|
---|
| 689 |
|
---|
| 690 | /**
|
---|
| 691 | * Internal worker for rtDvmVfsDir_OpenFile.
|
---|
| 692 | *
|
---|
| 693 | * @returns IPRT status code.
|
---|
| 694 | * @param hVol The volume handle (not consumed).
|
---|
| 695 | * @param hVolMgr The volume manager handle (not consumed).
|
---|
| 696 | * @param iVol The volume number.
|
---|
| 697 | * @param pszSymlink The volume name. Consumed on success.
|
---|
| 698 | * @param phVfsSymlinkOut Where to return the handle to the file.
|
---|
| 699 | */
|
---|
| 700 | static int rtDvmVfsCreateSymlinkForVolume(RTDVMVOLUME hVol, RTDVM hVolMgr, uint32_t iVol, char *pszSymlink,
|
---|
| 701 | PRTVFSSYMLINK phVfsSymlinkOut)
|
---|
| 702 | {
|
---|
| 703 | uint32_t cRefs = RTDvmVolumeRetain(hVol);
|
---|
| 704 | AssertReturn(cRefs != UINT32_MAX, VERR_INVALID_HANDLE);
|
---|
| 705 |
|
---|
| 706 | cRefs = RTDvmRetain(hVolMgr);
|
---|
| 707 | AssertReturnStmt(cRefs != UINT32_MAX, RTDvmVolumeRelease(hVol), VERR_INVALID_HANDLE);
|
---|
| 708 |
|
---|
| 709 | /*
|
---|
| 710 | * Create the symlink.
|
---|
| 711 | */
|
---|
| 712 | RTVFSSYMLINK hVfsSym;
|
---|
| 713 | PRTVFSDVMSYMLINK pThis;
|
---|
| 714 | int rc = RTVfsNewSymlink(&g_rtDvmVfsSymOps, sizeof(*pThis), NIL_RTVFS, NIL_RTVFSLOCK, &hVfsSym, (void **)&pThis);
|
---|
| 715 | if (RT_SUCCESS(rc))
|
---|
| 716 | {
|
---|
| 717 | pThis->hVol = hVol;
|
---|
| 718 | pThis->hVolMgr = hVolMgr;
|
---|
| 719 | pThis->pszSymlink = pszSymlink;
|
---|
| 720 | RTStrPrintf(pThis->szTarget, sizeof(pThis->szTarget), "vol%u", iVol);
|
---|
| 721 |
|
---|
| 722 | *phVfsSymlinkOut = hVfsSym;
|
---|
| 723 | return VINF_SUCCESS;
|
---|
| 724 | }
|
---|
| 725 | RTDvmRelease(hVolMgr);
|
---|
| 726 | RTDvmVolumeRelease(hVol);
|
---|
| 727 | return rc;
|
---|
| 728 | }
|
---|
| 729 |
|
---|
| 730 |
|
---|
| 731 |
|
---|
| 732 | /*********************************************************************************************************************************
|
---|
| 733 | * DVM Directory Objects *
|
---|
| 734 | *********************************************************************************************************************************/
|
---|
| 735 |
|
---|
| 736 | /**
|
---|
| 737 | * @interface_method_impl{RTVFSOBJOPS,pfnClose}
|
---|
| 738 | */
|
---|
[69616] | 739 | static DECLCALLBACK(int) rtDvmVfsDir_Close(void *pvThis)
|
---|
| 740 | {
|
---|
| 741 | PRTDVMVFSDIR pThis = (PRTDVMVFSDIR)pvThis;
|
---|
| 742 |
|
---|
| 743 | if (pThis->hCurVolume != NIL_RTDVMVOLUME)
|
---|
| 744 | {
|
---|
| 745 | RTDvmVolumeRelease(pThis->hCurVolume);
|
---|
| 746 | pThis->hCurVolume = NIL_RTDVMVOLUME;
|
---|
| 747 | }
|
---|
| 748 |
|
---|
[73156] | 749 | if (pThis->pszNameAlias)
|
---|
| 750 | {
|
---|
| 751 | RTStrFree(pThis->pszNameAlias);
|
---|
| 752 | pThis->pszNameAlias = NULL;
|
---|
| 753 | }
|
---|
| 754 |
|
---|
[69616] | 755 | pThis->pVfsVol = NULL;
|
---|
| 756 |
|
---|
| 757 | return VINF_SUCCESS;
|
---|
| 758 | }
|
---|
| 759 |
|
---|
| 760 |
|
---|
| 761 | /**
|
---|
| 762 | * @interface_method_impl{RTVFSOBJOPS,pfnQueryInfo}
|
---|
| 763 | */
|
---|
| 764 | static DECLCALLBACK(int) rtDvmVfsDir_QueryInfo(void *pvThis, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr)
|
---|
| 765 | {
|
---|
| 766 | PRTDVMVFSDIR pThis = (PRTDVMVFSDIR)pvThis;
|
---|
| 767 | pObjInfo->cbObject = pThis->pVfsVol->cVolumes;
|
---|
| 768 | pObjInfo->cbAllocated = pThis->pVfsVol->cVolumes;
|
---|
| 769 | RTTimeSpecSetNano(&pObjInfo->AccessTime, 0);
|
---|
| 770 | RTTimeSpecSetNano(&pObjInfo->ModificationTime, 0);
|
---|
| 771 | RTTimeSpecSetNano(&pObjInfo->ChangeTime, 0);
|
---|
| 772 | RTTimeSpecSetNano(&pObjInfo->BirthTime, 0);
|
---|
| 773 | pObjInfo->Attr.fMode = RTFS_TYPE_DIRECTORY | RTFS_DOS_DIRECTORY;
|
---|
| 774 | if (pThis->pVfsVol->fReadOnly)
|
---|
| 775 | pObjInfo->Attr.fMode |= RTFS_DOS_READONLY | 0555;
|
---|
[41094] | 776 | else
|
---|
[69616] | 777 | pObjInfo->Attr.fMode |= 0777;
|
---|
| 778 |
|
---|
| 779 | switch (enmAddAttr)
|
---|
| 780 | {
|
---|
| 781 | case RTFSOBJATTRADD_NOTHING:
|
---|
| 782 | case RTFSOBJATTRADD_UNIX:
|
---|
| 783 | pObjInfo->Attr.u.Unix.uid = NIL_RTUID;
|
---|
| 784 | pObjInfo->Attr.u.Unix.gid = (RTGID)RTDvmMapGetFormatType(pThis->pVfsVol->hVolMgr);
|
---|
| 785 | pObjInfo->Attr.u.Unix.cHardlinks = pThis->pVfsVol->cVolumes;
|
---|
| 786 | pObjInfo->Attr.u.Unix.INodeIdDevice = 0;
|
---|
| 787 | pObjInfo->Attr.u.Unix.INodeId = 0;
|
---|
| 788 | pObjInfo->Attr.u.Unix.fFlags = 0;
|
---|
| 789 | pObjInfo->Attr.u.Unix.GenerationId = 0;
|
---|
| 790 | pObjInfo->Attr.u.Unix.Device = 0;
|
---|
| 791 | break;
|
---|
| 792 |
|
---|
| 793 | case RTFSOBJATTRADD_UNIX_OWNER:
|
---|
| 794 | pObjInfo->Attr.u.UnixOwner.uid = NIL_RTUID;
|
---|
| 795 | pObjInfo->Attr.u.UnixOwner.szName[0] = '\0';
|
---|
| 796 | break;
|
---|
| 797 |
|
---|
| 798 | case RTFSOBJATTRADD_UNIX_GROUP:
|
---|
| 799 | pObjInfo->Attr.u.UnixGroup.gid = (RTGID)RTDvmMapGetFormatType(pThis->pVfsVol->hVolMgr);
|
---|
| 800 | RTStrCopy(pObjInfo->Attr.u.UnixGroup.szName, sizeof(pObjInfo->Attr.u.UnixGroup.szName),
|
---|
| 801 | RTDvmMapGetFormatName(pThis->pVfsVol->hVolMgr));
|
---|
| 802 | break;
|
---|
| 803 |
|
---|
| 804 | case RTFSOBJATTRADD_EASIZE:
|
---|
| 805 | pObjInfo->Attr.u.EASize.cb = 0;
|
---|
| 806 | break;
|
---|
| 807 |
|
---|
| 808 | default:
|
---|
| 809 | return VERR_INVALID_PARAMETER;
|
---|
| 810 | }
|
---|
| 811 | return VINF_SUCCESS;
|
---|
| 812 | }
|
---|
| 813 |
|
---|
| 814 |
|
---|
| 815 | /**
|
---|
| 816 | * @interface_method_impl{RTVFSOBJSETOPS,pfnMode}
|
---|
| 817 | */
|
---|
| 818 | static DECLCALLBACK(int) rtDvmVfsDir_SetMode(void *pvThis, RTFMODE fMode, RTFMODE fMask)
|
---|
| 819 | {
|
---|
| 820 | NOREF(pvThis); NOREF(fMode); NOREF(fMask);
|
---|
| 821 | return VERR_NOT_SUPPORTED;
|
---|
| 822 | }
|
---|
| 823 |
|
---|
| 824 |
|
---|
| 825 | /**
|
---|
| 826 | * @interface_method_impl{RTVFSOBJSETOPS,pfnSetTimes}
|
---|
| 827 | */
|
---|
| 828 | static DECLCALLBACK(int) rtDvmVfsDir_SetTimes(void *pvThis, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime,
|
---|
[69967] | 829 | PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime)
|
---|
[69616] | 830 | {
|
---|
| 831 | NOREF(pvThis); NOREF(pAccessTime); NOREF(pModificationTime); NOREF(pChangeTime); NOREF(pBirthTime);
|
---|
| 832 | return VERR_NOT_SUPPORTED;
|
---|
| 833 | }
|
---|
| 834 |
|
---|
| 835 |
|
---|
| 836 | /**
|
---|
| 837 | * @interface_method_impl{RTVFSOBJSETOPS,pfnSetOwner}
|
---|
| 838 | */
|
---|
| 839 | static DECLCALLBACK(int) rtDvmVfsDir_SetOwner(void *pvThis, RTUID uid, RTGID gid)
|
---|
| 840 | {
|
---|
| 841 | RT_NOREF(pvThis, uid, gid);
|
---|
| 842 | return VERR_NOT_SUPPORTED;
|
---|
| 843 | }
|
---|
| 844 |
|
---|
| 845 |
|
---|
[73156] | 846 | static int rtDvmVfsDir_FindEntry(PRTDVMVFSDIR pThis, const char *pszEntry,
|
---|
| 847 | PRTDVMVOLUME phVolume, uint32_t *piVol, char **ppszSymlink)
|
---|
[69616] | 848 | {
|
---|
[73156] | 849 | *phVolume = NIL_RTDVMVOLUME;
|
---|
| 850 | *ppszSymlink = NULL;
|
---|
| 851 | *piVol = UINT32_MAX;
|
---|
| 852 |
|
---|
[69616] | 853 | /*
|
---|
| 854 | * Enumerate the volumes and try match the volume name.
|
---|
| 855 | */
|
---|
| 856 | int rc;
|
---|
| 857 | PRTDVMVFSVOL pVfsVol = pThis->pVfsVol;
|
---|
| 858 | if (pVfsVol->cVolumes > 0)
|
---|
| 859 | {
|
---|
| 860 | /* The first volume. */
|
---|
| 861 | uint32_t iVol = 0;
|
---|
| 862 | RTDVMVOLUME hVol;
|
---|
| 863 | rc = RTDvmMapQueryFirstVolume(pThis->pVfsVol->hVolMgr, &hVol);
|
---|
| 864 | while (RT_SUCCESS(rc))
|
---|
| 865 | {
|
---|
| 866 | /* Match the name. */
|
---|
| 867 | bool fMatch;
|
---|
| 868 | char *pszVolName;
|
---|
| 869 | rc = RTDvmVolumeQueryName(hVol, &pszVolName);
|
---|
| 870 | if (RT_SUCCESS(rc))
|
---|
| 871 | {
|
---|
| 872 | fMatch = RTStrCmp(pszEntry, pszVolName) == 0 && *pszVolName != '\0';
|
---|
[73156] | 873 | if (fMatch)
|
---|
| 874 | {
|
---|
| 875 | *phVolume = hVol;
|
---|
| 876 | *ppszSymlink = pszVolName;
|
---|
| 877 | *piVol = iVol;
|
---|
| 878 | return VINF_SUCCESS;
|
---|
| 879 | }
|
---|
[69616] | 880 | RTStrFree(pszVolName);
|
---|
| 881 | }
|
---|
| 882 | else if (rc == VERR_NOT_SUPPORTED)
|
---|
| 883 | fMatch = false;
|
---|
| 884 | else
|
---|
| 885 | {
|
---|
| 886 | RTDvmVolumeRelease(hVol);
|
---|
| 887 | break;
|
---|
| 888 | }
|
---|
| 889 |
|
---|
| 890 | /* Match the sequential volume number. */
|
---|
| 891 | if (!fMatch)
|
---|
| 892 | {
|
---|
| 893 | char szTmp[16];
|
---|
| 894 | RTStrPrintf(szTmp, sizeof(szTmp), "vol%u", iVol);
|
---|
| 895 | fMatch = RTStrCmp(pszEntry, szTmp) == 0;
|
---|
| 896 | }
|
---|
| 897 |
|
---|
| 898 | if (fMatch)
|
---|
| 899 | {
|
---|
| 900 | *phVolume = hVol;
|
---|
[73156] | 901 | *piVol = iVol;
|
---|
[69616] | 902 | return VINF_SUCCESS;
|
---|
| 903 | }
|
---|
| 904 |
|
---|
| 905 | /* More volumes? */
|
---|
| 906 | iVol++;
|
---|
| 907 | if (iVol >= pVfsVol->cVolumes)
|
---|
| 908 | {
|
---|
| 909 | RTDvmVolumeRelease(hVol);
|
---|
| 910 | rc = VERR_FILE_NOT_FOUND;
|
---|
| 911 | break;
|
---|
| 912 | }
|
---|
| 913 |
|
---|
| 914 | /* Get the next volume. */
|
---|
| 915 | RTDVMVOLUME hVolNext;
|
---|
| 916 | rc = RTDvmMapQueryNextVolume(pThis->pVfsVol->hVolMgr, hVol, &hVolNext);
|
---|
| 917 | RTDvmVolumeRelease(hVol);
|
---|
| 918 | hVol = hVolNext;
|
---|
| 919 | }
|
---|
| 920 | }
|
---|
| 921 | else
|
---|
| 922 | rc = VERR_FILE_NOT_FOUND;
|
---|
[41094] | 923 | return rc;
|
---|
| 924 | }
|
---|
| 925 |
|
---|
[69609] | 926 |
|
---|
[69616] | 927 | /**
|
---|
[69813] | 928 | * @interface_method_impl{RTVFSDIROPS,pfnOpen}
|
---|
[69616] | 929 | */
|
---|
[69813] | 930 | static DECLCALLBACK(int) rtDvmVfsDir_Open(void *pvThis, const char *pszEntry, uint64_t fOpen, uint32_t fFlags, PRTVFSOBJ phVfsObj)
|
---|
[69616] | 931 | {
|
---|
| 932 | PRTDVMVFSDIR pThis = (PRTDVMVFSDIR)pvThis;
|
---|
[69828] | 933 |
|
---|
| 934 | /*
|
---|
| 935 | * Special case: '.' and '..'
|
---|
| 936 | */
|
---|
| 937 | if ( pszEntry[0] == '.'
|
---|
| 938 | && ( pszEntry[1] == '\0'
|
---|
| 939 | || ( pszEntry[1] == '.'
|
---|
| 940 | && pszEntry[2] == '\0')))
|
---|
| 941 | {
|
---|
| 942 | if ( (fOpen & RTFILE_O_ACTION_MASK) == RTFILE_O_OPEN
|
---|
| 943 | || (fOpen & RTFILE_O_ACTION_MASK) == RTFILE_O_OPEN_CREATE
|
---|
| 944 | || (fOpen & RTFILE_O_ACTION_MASK) == RTFILE_O_CREATE_REPLACE)
|
---|
| 945 | {
|
---|
| 946 | if (fFlags & RTVFSOBJ_F_OPEN_DIRECTORY)
|
---|
| 947 | {
|
---|
| 948 | RTVFSDIR hVfsDir;
|
---|
| 949 | int rc = rtDvmVfsVol_OpenRoot(pThis->pVfsVol, &hVfsDir);
|
---|
| 950 | if (RT_SUCCESS(rc))
|
---|
| 951 | {
|
---|
| 952 | *phVfsObj = RTVfsObjFromDir(hVfsDir);
|
---|
| 953 | RTVfsDirRelease(hVfsDir);
|
---|
| 954 | AssertStmt(*phVfsObj != NIL_RTVFSOBJ, rc = VERR_INTERNAL_ERROR_3);
|
---|
| 955 | }
|
---|
| 956 | return rc;
|
---|
| 957 | }
|
---|
| 958 | return VERR_IS_A_DIRECTORY;
|
---|
| 959 | }
|
---|
| 960 | return VERR_ACCESS_DENIED;
|
---|
| 961 | }
|
---|
| 962 |
|
---|
| 963 | /*
|
---|
| 964 | * Open volume file.
|
---|
| 965 | */
|
---|
[73156] | 966 | RTDVMVOLUME hVolume = NIL_RTDVMVOLUME;
|
---|
| 967 | uint32_t iVol = 0;
|
---|
| 968 | char *pszSymlink = NULL;
|
---|
| 969 | int rc = rtDvmVfsDir_FindEntry(pThis, pszEntry, &hVolume, &iVol, &pszSymlink);
|
---|
[69616] | 970 | if (RT_SUCCESS(rc))
|
---|
| 971 | {
|
---|
| 972 | if ( (fOpen & RTFILE_O_ACTION_MASK) == RTFILE_O_OPEN
|
---|
| 973 | || (fOpen & RTFILE_O_ACTION_MASK) == RTFILE_O_OPEN_CREATE
|
---|
| 974 | || (fOpen & RTFILE_O_ACTION_MASK) == RTFILE_O_CREATE_REPLACE)
|
---|
| 975 | {
|
---|
[69813] | 976 | if (fFlags & (RTVFSOBJ_F_OPEN_FILE | RTVFSOBJ_F_OPEN_DEV_BLOCK))
|
---|
| 977 | {
|
---|
[73156] | 978 | if (!pszSymlink)
|
---|
[69813] | 979 | {
|
---|
[73156] | 980 | if ( !(fOpen & RTFILE_O_WRITE)
|
---|
| 981 | || !pThis->pVfsVol->fReadOnly)
|
---|
[69813] | 982 | {
|
---|
[73156] | 983 | /* Create file object. */
|
---|
| 984 | RTVFSFILE hVfsFile;
|
---|
| 985 | rc = rtDvmVfsCreateFileForVolume(pThis->pVfsVol, hVolume, fOpen, &hVfsFile);
|
---|
| 986 | if (RT_SUCCESS(rc))
|
---|
| 987 | {
|
---|
| 988 | *phVfsObj = RTVfsObjFromFile(hVfsFile);
|
---|
| 989 | RTVfsFileRelease(hVfsFile);
|
---|
| 990 | AssertStmt(*phVfsObj != NIL_RTVFSOBJ, rc = VERR_INTERNAL_ERROR_3);
|
---|
| 991 | }
|
---|
[69813] | 992 | }
|
---|
[73156] | 993 | else
|
---|
| 994 | rc = VERR_WRITE_PROTECT;
|
---|
[69813] | 995 | }
|
---|
| 996 | else
|
---|
[73156] | 997 | rc = VERR_IS_A_SYMLINK;
|
---|
[69813] | 998 | }
|
---|
[73156] | 999 | else if (fFlags & RTVFSOBJ_F_OPEN_SYMLINK)
|
---|
| 1000 | {
|
---|
| 1001 | /* Create symlink object */
|
---|
[73265] | 1002 | RTVFSSYMLINK hVfsSym = NIL_RTVFSSYMLINK; /* (older gcc maybe used uninitialized) */
|
---|
[73156] | 1003 | rc = rtDvmVfsCreateSymlinkForVolume(hVolume, pThis->pVfsVol ? pThis->pVfsVol->hVolMgr : NIL_RTDVM, iVol,
|
---|
| 1004 | pszSymlink, &hVfsSym);
|
---|
| 1005 | if (RT_SUCCESS(rc))
|
---|
| 1006 | {
|
---|
| 1007 | *phVfsObj = RTVfsObjFromSymlink(hVfsSym);
|
---|
| 1008 | RTVfsSymlinkRelease(hVfsSym);
|
---|
| 1009 | AssertStmt(*phVfsObj != NIL_RTVFSOBJ, rc = VERR_INTERNAL_ERROR_3);
|
---|
| 1010 | pszSymlink = NULL;
|
---|
| 1011 | }
|
---|
| 1012 | }
|
---|
[69616] | 1013 | else
|
---|
[69813] | 1014 | rc = VERR_IS_A_FILE;
|
---|
[69616] | 1015 | }
|
---|
| 1016 | else
|
---|
| 1017 | rc = VERR_ALREADY_EXISTS;
|
---|
| 1018 | RTDvmVolumeRelease(hVolume);
|
---|
[73156] | 1019 | if (pszSymlink)
|
---|
| 1020 | RTStrFree(pszSymlink);
|
---|
[69616] | 1021 | }
|
---|
| 1022 | return rc;
|
---|
| 1023 | }
|
---|
[69609] | 1024 |
|
---|
| 1025 |
|
---|
| 1026 | /**
|
---|
[69813] | 1027 | * @interface_method_impl{RTVFSDIROPS,pfnOpenFile}
|
---|
| 1028 | */
|
---|
| 1029 | static DECLCALLBACK(int) rtDvmVfsDir_OpenFile(void *pvThis, const char *pszFilename, uint64_t fOpen, PRTVFSFILE phVfsFile)
|
---|
| 1030 | {
|
---|
| 1031 | RTVFSOBJ hVfsObj;
|
---|
| 1032 | int rc = rtDvmVfsDir_Open(pvThis, pszFilename, fOpen, RTVFSOBJ_F_OPEN_FILE, &hVfsObj);
|
---|
| 1033 | if (RT_SUCCESS(rc))
|
---|
| 1034 | {
|
---|
| 1035 | *phVfsFile = RTVfsObjToFile(hVfsObj);
|
---|
| 1036 | RTVfsObjRelease(hVfsObj);
|
---|
| 1037 | }
|
---|
| 1038 | return rc;
|
---|
| 1039 | }
|
---|
| 1040 |
|
---|
| 1041 |
|
---|
| 1042 | /**
|
---|
[69616] | 1043 | * @interface_method_impl{RTVFSDIROPS,pfnCreateDir}
|
---|
| 1044 | */
|
---|
| 1045 | static DECLCALLBACK(int) rtDvmVfsDir_CreateDir(void *pvThis, const char *pszSubDir, RTFMODE fMode, PRTVFSDIR phVfsDir)
|
---|
| 1046 | {
|
---|
| 1047 | RT_NOREF(pvThis, pszSubDir, fMode, phVfsDir);
|
---|
| 1048 | return VERR_NOT_SUPPORTED;
|
---|
| 1049 | }
|
---|
| 1050 |
|
---|
| 1051 |
|
---|
| 1052 | /**
|
---|
| 1053 | * @interface_method_impl{RTVFSDIROPS,pfnOpenSymlink}
|
---|
| 1054 | */
|
---|
| 1055 | static DECLCALLBACK(int) rtDvmVfsDir_OpenSymlink(void *pvThis, const char *pszSymlink, PRTVFSSYMLINK phVfsSymlink)
|
---|
| 1056 | {
|
---|
| 1057 | RT_NOREF(pvThis, pszSymlink, phVfsSymlink);
|
---|
| 1058 | return VERR_NOT_SUPPORTED;
|
---|
| 1059 | }
|
---|
| 1060 |
|
---|
| 1061 |
|
---|
| 1062 | /**
|
---|
| 1063 | * @interface_method_impl{RTVFSDIROPS,pfnCreateSymlink}
|
---|
| 1064 | */
|
---|
| 1065 | static DECLCALLBACK(int) rtDvmVfsDir_CreateSymlink(void *pvThis, const char *pszSymlink, const char *pszTarget,
|
---|
| 1066 | RTSYMLINKTYPE enmType, PRTVFSSYMLINK phVfsSymlink)
|
---|
| 1067 | {
|
---|
| 1068 | RT_NOREF(pvThis, pszSymlink, pszTarget, enmType, phVfsSymlink);
|
---|
| 1069 | return VERR_NOT_SUPPORTED;
|
---|
| 1070 | }
|
---|
| 1071 |
|
---|
| 1072 |
|
---|
| 1073 | /**
|
---|
| 1074 | * @interface_method_impl{RTVFSDIROPS,pfnUnlinkEntry}
|
---|
| 1075 | */
|
---|
| 1076 | static DECLCALLBACK(int) rtDvmVfsDir_UnlinkEntry(void *pvThis, const char *pszEntry, RTFMODE fType)
|
---|
| 1077 | {
|
---|
| 1078 | RT_NOREF(pvThis, pszEntry, fType);
|
---|
| 1079 | return VERR_NOT_IMPLEMENTED;
|
---|
| 1080 | }
|
---|
| 1081 |
|
---|
| 1082 |
|
---|
| 1083 | /**
|
---|
| 1084 | * @interface_method_impl{RTVFSDIROPS,pfnRenameEntry}
|
---|
| 1085 | */
|
---|
| 1086 | static DECLCALLBACK(int) rtDvmVfsDir_RenameEntry(void *pvThis, const char *pszEntry, RTFMODE fType, const char *pszNewName)
|
---|
| 1087 | {
|
---|
| 1088 | RT_NOREF(pvThis, pszEntry, fType, pszNewName);
|
---|
| 1089 | return VERR_NOT_IMPLEMENTED;
|
---|
| 1090 | }
|
---|
| 1091 |
|
---|
| 1092 |
|
---|
| 1093 | /**
|
---|
| 1094 | * @interface_method_impl{RTVFSDIROPS,pfnRewindDir}
|
---|
| 1095 | */
|
---|
| 1096 | static DECLCALLBACK(int) rtDvmVfsDir_RewindDir(void *pvThis)
|
---|
| 1097 | {
|
---|
| 1098 | PRTDVMVFSDIR pThis = (PRTDVMVFSDIR)pvThis;
|
---|
| 1099 |
|
---|
| 1100 | if (pThis->hCurVolume != NIL_RTDVMVOLUME)
|
---|
| 1101 | {
|
---|
| 1102 | RTDvmVolumeRelease(pThis->hCurVolume);
|
---|
| 1103 | pThis->hCurVolume = NIL_RTDVMVOLUME;
|
---|
| 1104 | }
|
---|
| 1105 | pThis->fReturnCurrent = false;
|
---|
| 1106 | pThis->offDir = 0;
|
---|
[73156] | 1107 | if (pThis->pszNameAlias)
|
---|
| 1108 | {
|
---|
| 1109 | RTStrFree(pThis->pszNameAlias);
|
---|
| 1110 | pThis->pszNameAlias = NULL;
|
---|
| 1111 | }
|
---|
[69616] | 1112 |
|
---|
| 1113 | return VINF_SUCCESS;
|
---|
| 1114 | }
|
---|
| 1115 |
|
---|
| 1116 |
|
---|
| 1117 | /**
|
---|
| 1118 | * @interface_method_impl{RTVFSDIROPS,pfnReadDir}
|
---|
| 1119 | */
|
---|
| 1120 | static DECLCALLBACK(int) rtDvmVfsDir_ReadDir(void *pvThis, PRTDIRENTRYEX pDirEntry, size_t *pcbDirEntry,
|
---|
| 1121 | RTFSOBJATTRADD enmAddAttr)
|
---|
| 1122 | {
|
---|
| 1123 | PRTDVMVFSDIR pThis = (PRTDVMVFSDIR)pvThis;
|
---|
| 1124 | PRTDVMVFSVOL pVfsVol = pThis->pVfsVol;
|
---|
| 1125 | int rc;
|
---|
| 1126 |
|
---|
| 1127 | /*
|
---|
[73156] | 1128 | * Format the volume name since we'll be needing it all but the final call.
|
---|
[69616] | 1129 | */
|
---|
[73156] | 1130 | char szVolNo[16];
|
---|
| 1131 | size_t const cchVolNo = RTStrPrintf(szVolNo, sizeof(szVolNo), "vol%u", pThis->offDir);
|
---|
| 1132 |
|
---|
[69616] | 1133 | if (!pThis->fReturnCurrent)
|
---|
| 1134 | {
|
---|
[73156] | 1135 | /*
|
---|
| 1136 | * Do we have a pending name alias to return?
|
---|
| 1137 | */
|
---|
| 1138 | if (pThis->pszNameAlias)
|
---|
| 1139 | {
|
---|
| 1140 | size_t cchNameAlias = strlen(pThis->pszNameAlias);
|
---|
| 1141 | size_t cbNeeded = RT_UOFFSETOF_DYN(RTDIRENTRYEX, szName[cchNameAlias + 1]);
|
---|
| 1142 | if (cbNeeded <= *pcbDirEntry)
|
---|
| 1143 | {
|
---|
| 1144 | *pcbDirEntry = cbNeeded;
|
---|
| 1145 |
|
---|
| 1146 | /* Do the names. */
|
---|
| 1147 | pDirEntry->cbName = (uint16_t)cchNameAlias;
|
---|
| 1148 | memcpy(pDirEntry->szName, pThis->pszNameAlias, cchNameAlias + 1);
|
---|
| 1149 | pDirEntry->cwcShortName = 0;
|
---|
| 1150 | pDirEntry->wszShortName[0] = '\0';
|
---|
| 1151 |
|
---|
| 1152 |
|
---|
| 1153 | /* Do the rest. */
|
---|
| 1154 | rc = rtDvmVfsSym_QueryInfoWorker(pThis->hCurVolume, pVfsVol->hVolMgr, szVolNo, &pDirEntry->Info, enmAddAttr);
|
---|
| 1155 | if (RT_SUCCESS(rc))
|
---|
| 1156 | {
|
---|
| 1157 | RTStrFree(pThis->pszNameAlias);
|
---|
| 1158 | pThis->pszNameAlias = NULL;
|
---|
| 1159 | pThis->offDir += 1;
|
---|
| 1160 | }
|
---|
| 1161 | return rc;
|
---|
| 1162 | }
|
---|
| 1163 |
|
---|
| 1164 | *pcbDirEntry = cbNeeded;
|
---|
| 1165 | return VERR_BUFFER_OVERFLOW;
|
---|
| 1166 | }
|
---|
| 1167 |
|
---|
| 1168 | /*
|
---|
| 1169 | * Get the next volume to return info about.
|
---|
| 1170 | */
|
---|
[69616] | 1171 | if (pThis->offDir < pVfsVol->cVolumes)
|
---|
| 1172 | {
|
---|
| 1173 | RTDVMVOLUME hNextVolume;
|
---|
| 1174 | if (pThis->offDir == 0)
|
---|
| 1175 | rc = RTDvmMapQueryFirstVolume(pVfsVol->hVolMgr, &hNextVolume);
|
---|
| 1176 | else
|
---|
| 1177 | rc = RTDvmMapQueryNextVolume(pVfsVol->hVolMgr, pThis->hCurVolume, &hNextVolume);
|
---|
| 1178 | if (RT_FAILURE(rc))
|
---|
| 1179 | return rc;
|
---|
| 1180 | RTDvmVolumeRelease(pThis->hCurVolume);
|
---|
| 1181 | pThis->hCurVolume = hNextVolume;
|
---|
[73156] | 1182 |
|
---|
| 1183 | /* Check if we need to return a name alias later. */
|
---|
| 1184 | rc = RTDvmVolumeQueryName(pThis->hCurVolume, &pThis->pszNameAlias);
|
---|
| 1185 | if (RT_FAILURE(rc))
|
---|
| 1186 | pThis->pszNameAlias = NULL;
|
---|
| 1187 | else if (*pThis->pszNameAlias == '\0')
|
---|
| 1188 | {
|
---|
| 1189 | RTStrFree(pThis->pszNameAlias);
|
---|
| 1190 | pThis->pszNameAlias = NULL;
|
---|
| 1191 | }
|
---|
[69616] | 1192 | }
|
---|
| 1193 | else
|
---|
| 1194 | {
|
---|
| 1195 | RTDvmVolumeRelease(pThis->hCurVolume);
|
---|
| 1196 | pThis->hCurVolume = NIL_RTDVMVOLUME;
|
---|
| 1197 | return VERR_NO_MORE_FILES;
|
---|
| 1198 | }
|
---|
| 1199 | }
|
---|
| 1200 |
|
---|
| 1201 | /*
|
---|
| 1202 | * Figure out the name length.
|
---|
| 1203 | */
|
---|
[73156] | 1204 | size_t cbNeeded = RT_UOFFSETOF_DYN(RTDIRENTRYEX, szName[cchVolNo + 1]);
|
---|
| 1205 | if (cbNeeded <= *pcbDirEntry)
|
---|
[69616] | 1206 | {
|
---|
[73156] | 1207 | *pcbDirEntry = cbNeeded;
|
---|
[69616] | 1208 |
|
---|
[73156] | 1209 | /* Do the names. */
|
---|
| 1210 | pDirEntry->cbName = (uint16_t)cchVolNo;
|
---|
| 1211 | memcpy(pDirEntry->szName, szVolNo, cchVolNo + 1);
|
---|
| 1212 | pDirEntry->cwcShortName = 0;
|
---|
| 1213 | pDirEntry->wszShortName[0] = '\0';
|
---|
| 1214 |
|
---|
| 1215 | /* Do the rest. */
|
---|
| 1216 | rc = rtDvmVfsFile_QueryInfoWorker(pThis->hCurVolume, pVfsVol->hVolMgr, pVfsVol->fReadOnly, &pDirEntry->Info, enmAddAttr);
|
---|
| 1217 | if (RT_SUCCESS(rc))
|
---|
[69616] | 1218 | {
|
---|
[73156] | 1219 | pThis->fReturnCurrent = false;
|
---|
| 1220 | if (!pThis->pszNameAlias)
|
---|
| 1221 | pThis->offDir += 1;
|
---|
[69616] | 1222 | return rc;
|
---|
| 1223 | }
|
---|
[73156] | 1224 | }
|
---|
| 1225 | else
|
---|
| 1226 | {
|
---|
[69616] | 1227 | *pcbDirEntry = cbNeeded;
|
---|
| 1228 | rc = VERR_BUFFER_OVERFLOW;
|
---|
| 1229 | }
|
---|
| 1230 | pThis->fReturnCurrent = true;
|
---|
| 1231 | return rc;
|
---|
| 1232 | }
|
---|
| 1233 |
|
---|
| 1234 |
|
---|
| 1235 | /**
|
---|
| 1236 | * DVM (root) directory operations.
|
---|
| 1237 | */
|
---|
| 1238 | static const RTVFSDIROPS g_rtDvmVfsDirOps =
|
---|
| 1239 | {
|
---|
| 1240 | { /* Obj */
|
---|
| 1241 | RTVFSOBJOPS_VERSION,
|
---|
| 1242 | RTVFSOBJTYPE_DIR,
|
---|
| 1243 | "DvmDir",
|
---|
| 1244 | rtDvmVfsDir_Close,
|
---|
| 1245 | rtDvmVfsDir_QueryInfo,
|
---|
[94291] | 1246 | NULL,
|
---|
[69616] | 1247 | RTVFSOBJOPS_VERSION
|
---|
| 1248 | },
|
---|
| 1249 | RTVFSDIROPS_VERSION,
|
---|
| 1250 | 0,
|
---|
| 1251 | { /* ObjSet */
|
---|
| 1252 | RTVFSOBJSETOPS_VERSION,
|
---|
[73097] | 1253 | RT_UOFFSETOF(RTVFSDIROPS, ObjSet) - RT_UOFFSETOF(RTVFSDIROPS, Obj),
|
---|
[69616] | 1254 | rtDvmVfsDir_SetMode,
|
---|
| 1255 | rtDvmVfsDir_SetTimes,
|
---|
| 1256 | rtDvmVfsDir_SetOwner,
|
---|
| 1257 | RTVFSOBJSETOPS_VERSION
|
---|
| 1258 | },
|
---|
[69813] | 1259 | rtDvmVfsDir_Open,
|
---|
[69826] | 1260 | NULL /* pfnFollowAbsoluteSymlink */,
|
---|
[69616] | 1261 | rtDvmVfsDir_OpenFile,
|
---|
[69828] | 1262 | NULL /* pfnOpenDir */,
|
---|
[69616] | 1263 | rtDvmVfsDir_CreateDir,
|
---|
| 1264 | rtDvmVfsDir_OpenSymlink,
|
---|
| 1265 | rtDvmVfsDir_CreateSymlink,
|
---|
[69828] | 1266 | NULL /* pfnQueryEntryInfo */,
|
---|
[69616] | 1267 | rtDvmVfsDir_UnlinkEntry,
|
---|
| 1268 | rtDvmVfsDir_RenameEntry,
|
---|
| 1269 | rtDvmVfsDir_RewindDir,
|
---|
| 1270 | rtDvmVfsDir_ReadDir,
|
---|
| 1271 | RTVFSDIROPS_VERSION,
|
---|
| 1272 | };
|
---|
| 1273 |
|
---|
| 1274 |
|
---|
| 1275 |
|
---|
| 1276 | /**
|
---|
[69609] | 1277 | * @interface_method_impl{RTVFSOBJOPS::Obj,pfnClose}
|
---|
| 1278 | */
|
---|
| 1279 | static DECLCALLBACK(int) rtDvmVfsVol_Close(void *pvThis)
|
---|
| 1280 | {
|
---|
| 1281 | PRTDVMVFSVOL pThis = (PRTDVMVFSVOL)pvThis;
|
---|
| 1282 | LogFlow(("rtDvmVfsVol_Close(%p)\n", pThis));
|
---|
| 1283 |
|
---|
| 1284 | if ( pThis->fCloseDvm
|
---|
| 1285 | && pThis->hVolMgr != NIL_RTDVM )
|
---|
| 1286 | RTDvmRelease(pThis->hVolMgr);
|
---|
| 1287 | pThis->hVolMgr = NIL_RTDVM;
|
---|
| 1288 |
|
---|
| 1289 | return VINF_SUCCESS;
|
---|
| 1290 | }
|
---|
| 1291 |
|
---|
| 1292 |
|
---|
| 1293 | /**
|
---|
| 1294 | * @interface_method_impl{RTVFSOBJOPS::Obj,pfnQueryInfo}
|
---|
| 1295 | */
|
---|
| 1296 | static DECLCALLBACK(int) rtDvmVfsVol_QueryInfo(void *pvThis, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr)
|
---|
| 1297 | {
|
---|
| 1298 | RT_NOREF(pvThis, pObjInfo, enmAddAttr);
|
---|
| 1299 | return VERR_WRONG_TYPE;
|
---|
| 1300 | }
|
---|
| 1301 |
|
---|
| 1302 |
|
---|
| 1303 | /**
|
---|
| 1304 | * @interface_method_impl{RTVFSOPS,pfnOpenRoot}
|
---|
| 1305 | */
|
---|
| 1306 | static DECLCALLBACK(int) rtDvmVfsVol_OpenRoot(void *pvThis, PRTVFSDIR phVfsDir)
|
---|
| 1307 | {
|
---|
[69616] | 1308 | PRTDVMVFSVOL pThis = (PRTDVMVFSVOL)pvThis;
|
---|
[69609] | 1309 |
|
---|
[69616] | 1310 | PRTDVMVFSDIR pNewDir;
|
---|
| 1311 | int rc = RTVfsNewDir(&g_rtDvmVfsDirOps, sizeof(*pNewDir), 0 /*fFlags*/, pThis->hVfsSelf,
|
---|
| 1312 | NIL_RTVFSLOCK /*use volume lock*/, phVfsDir, (void **)&pNewDir);
|
---|
| 1313 | if (RT_SUCCESS(rc))
|
---|
| 1314 | {
|
---|
| 1315 | pNewDir->offDir = 0;
|
---|
| 1316 | pNewDir->pVfsVol = pThis;
|
---|
| 1317 | pNewDir->fReturnCurrent = false;
|
---|
[73156] | 1318 | pNewDir->pszNameAlias = NULL;
|
---|
[69616] | 1319 | pNewDir->hCurVolume = NIL_RTDVMVOLUME;
|
---|
| 1320 | }
|
---|
| 1321 | return rc;
|
---|
[69609] | 1322 | }
|
---|
| 1323 |
|
---|
| 1324 |
|
---|
| 1325 | /**
|
---|
[69844] | 1326 | * @interface_method_impl{RTVFSOPS,pfnQueryRangeState}
|
---|
[69609] | 1327 | */
|
---|
[69844] | 1328 | static DECLCALLBACK(int) rtDvmVfsVol_QueryRangeState(void *pvThis, uint64_t off, size_t cb, bool *pfUsed)
|
---|
[69609] | 1329 | {
|
---|
| 1330 | RT_NOREF(pvThis, off, cb, pfUsed);
|
---|
| 1331 | return VERR_NOT_IMPLEMENTED;
|
---|
| 1332 | }
|
---|
| 1333 |
|
---|
| 1334 |
|
---|
| 1335 | DECL_HIDDEN_CONST(const RTVFSOPS) g_rtDvmVfsVolOps =
|
---|
| 1336 | {
|
---|
| 1337 | { /* Obj */
|
---|
| 1338 | RTVFSOBJOPS_VERSION,
|
---|
| 1339 | RTVFSOBJTYPE_VFS,
|
---|
| 1340 | "DvmVol",
|
---|
| 1341 | rtDvmVfsVol_Close,
|
---|
| 1342 | rtDvmVfsVol_QueryInfo,
|
---|
[94291] | 1343 | NULL,
|
---|
[69609] | 1344 | RTVFSOBJOPS_VERSION
|
---|
| 1345 | },
|
---|
| 1346 | RTVFSOPS_VERSION,
|
---|
| 1347 | 0 /* fFeatures */,
|
---|
| 1348 | rtDvmVfsVol_OpenRoot,
|
---|
[69844] | 1349 | rtDvmVfsVol_QueryRangeState,
|
---|
[69609] | 1350 | RTVFSOPS_VERSION
|
---|
| 1351 | };
|
---|
| 1352 |
|
---|
| 1353 |
|
---|
| 1354 |
|
---|
| 1355 | /**
|
---|
| 1356 | * @interface_method_impl{RTVFSCHAINELEMENTREG,pfnValidate}
|
---|
| 1357 | */
|
---|
| 1358 | static DECLCALLBACK(int) rtDvmVfsChain_Validate(PCRTVFSCHAINELEMENTREG pProviderReg, PRTVFSCHAINSPEC pSpec,
|
---|
| 1359 | PRTVFSCHAINELEMSPEC pElement, uint32_t *poffError, PRTERRINFO pErrInfo)
|
---|
| 1360 | {
|
---|
| 1361 | RT_NOREF(pProviderReg, pSpec);
|
---|
| 1362 |
|
---|
| 1363 | /*
|
---|
| 1364 | * Basic checks.
|
---|
| 1365 | */
|
---|
| 1366 | if (pElement->enmTypeIn != RTVFSOBJTYPE_FILE)
|
---|
| 1367 | return pElement->enmTypeIn == RTVFSOBJTYPE_INVALID ? VERR_VFS_CHAIN_CANNOT_BE_FIRST_ELEMENT : VERR_VFS_CHAIN_TAKES_FILE;
|
---|
| 1368 | if (pElement->enmType != RTVFSOBJTYPE_VFS)
|
---|
| 1369 | return VERR_VFS_CHAIN_ONLY_VFS;
|
---|
| 1370 |
|
---|
| 1371 | if (pElement->cArgs > 1)
|
---|
| 1372 | return VERR_VFS_CHAIN_AT_MOST_ONE_ARG;
|
---|
| 1373 |
|
---|
| 1374 | /*
|
---|
| 1375 | * Parse the flag if present, save in pElement->uProvider.
|
---|
| 1376 | */
|
---|
| 1377 | /** @todo allow specifying sector size */
|
---|
| 1378 | bool fReadOnly = (pSpec->fOpenFile & RTFILE_O_ACCESS_MASK) == RTFILE_O_READ;
|
---|
| 1379 | if (pElement->cArgs > 0)
|
---|
| 1380 | {
|
---|
| 1381 | const char *psz = pElement->paArgs[0].psz;
|
---|
| 1382 | if (*psz)
|
---|
| 1383 | {
|
---|
| 1384 | if ( !strcmp(psz, "ro")
|
---|
| 1385 | || !strcmp(psz, "r"))
|
---|
| 1386 | fReadOnly = true;
|
---|
| 1387 | else if (!strcmp(psz, "rw"))
|
---|
| 1388 | fReadOnly = false;
|
---|
| 1389 | else
|
---|
| 1390 | {
|
---|
| 1391 | *poffError = pElement->paArgs[0].offSpec;
|
---|
| 1392 | return RTErrInfoSet(pErrInfo, VERR_VFS_CHAIN_INVALID_ARGUMENT, "Expected 'ro' or 'rw' as argument");
|
---|
| 1393 | }
|
---|
| 1394 | }
|
---|
| 1395 | }
|
---|
| 1396 |
|
---|
| 1397 | pElement->uProvider = fReadOnly;
|
---|
| 1398 | return VINF_SUCCESS;
|
---|
| 1399 | }
|
---|
| 1400 |
|
---|
| 1401 |
|
---|
| 1402 | /**
|
---|
| 1403 | * @interface_method_impl{RTVFSCHAINELEMENTREG,pfnInstantiate}
|
---|
| 1404 | */
|
---|
| 1405 | static DECLCALLBACK(int) rtDvmVfsChain_Instantiate(PCRTVFSCHAINELEMENTREG pProviderReg, PCRTVFSCHAINSPEC pSpec,
|
---|
| 1406 | PCRTVFSCHAINELEMSPEC pElement, RTVFSOBJ hPrevVfsObj,
|
---|
| 1407 | PRTVFSOBJ phVfsObj, uint32_t *poffError, PRTERRINFO pErrInfo)
|
---|
| 1408 | {
|
---|
| 1409 | RT_NOREF(pProviderReg, pSpec, poffError, pErrInfo);
|
---|
| 1410 | AssertReturn(hPrevVfsObj != NIL_RTVFSOBJ, VERR_VFS_CHAIN_IPE);
|
---|
| 1411 |
|
---|
| 1412 | /*
|
---|
| 1413 | * Instantiate the volume manager and open the map stuff.
|
---|
| 1414 | */
|
---|
| 1415 | RTVFSFILE hPrevVfsFile = RTVfsObjToFile(hPrevVfsObj);
|
---|
| 1416 | AssertReturn(hPrevVfsFile != NIL_RTVFSFILE, VERR_VFS_CHAIN_CAST_FAILED);
|
---|
| 1417 |
|
---|
| 1418 | RTDVM hVolMgr;
|
---|
| 1419 | int rc = RTDvmCreate(&hVolMgr, hPrevVfsFile, 512, 0 /*fFlags*/);
|
---|
| 1420 | RTVfsFileRelease(hPrevVfsFile);
|
---|
| 1421 | if (RT_SUCCESS(rc))
|
---|
| 1422 | {
|
---|
| 1423 | rc = RTDvmMapOpen(hVolMgr);
|
---|
| 1424 | if (RT_SUCCESS(rc))
|
---|
| 1425 | {
|
---|
| 1426 | /*
|
---|
| 1427 | * Create a VFS instance for the volume manager.
|
---|
| 1428 | */
|
---|
| 1429 | RTVFS hVfs = NIL_RTVFS;
|
---|
| 1430 | PRTDVMVFSVOL pThis = NULL;
|
---|
[69610] | 1431 | rc = RTVfsNew(&g_rtDvmVfsVolOps, sizeof(RTDVMVFSVOL), NIL_RTVFS, RTVFSLOCK_CREATE_RW, &hVfs, (void **)&pThis);
|
---|
[69609] | 1432 | if (RT_SUCCESS(rc))
|
---|
| 1433 | {
|
---|
| 1434 | pThis->hVolMgr = hVolMgr;
|
---|
| 1435 | pThis->fCloseDvm = true;
|
---|
| 1436 | pThis->fReadOnly = pElement->uProvider == (uint64_t)true;
|
---|
| 1437 | pThis->cVolumes = RTDvmMapGetValidVolumes(hVolMgr);
|
---|
[69616] | 1438 | pThis->hVfsSelf = hVfs;
|
---|
[69609] | 1439 |
|
---|
| 1440 | *phVfsObj = RTVfsObjFromVfs(hVfs);
|
---|
| 1441 | RTVfsRelease(hVfs);
|
---|
| 1442 | return *phVfsObj != NIL_RTVFSOBJ ? VINF_SUCCESS : VERR_VFS_CHAIN_CAST_FAILED;
|
---|
| 1443 | }
|
---|
| 1444 | }
|
---|
| 1445 | else
|
---|
| 1446 | rc = RTErrInfoSetF(pErrInfo, rc, "RTDvmMapOpen failed: %Rrc", rc);
|
---|
| 1447 | RTDvmRelease(hVolMgr);
|
---|
| 1448 | }
|
---|
| 1449 | else
|
---|
| 1450 | rc = RTErrInfoSetF(pErrInfo, rc, "RTDvmCreate failed: %Rrc", rc);
|
---|
| 1451 | return rc;
|
---|
| 1452 | }
|
---|
| 1453 |
|
---|
| 1454 |
|
---|
| 1455 | /**
|
---|
| 1456 | * @interface_method_impl{RTVFSCHAINELEMENTREG,pfnCanReuseElement}
|
---|
| 1457 | */
|
---|
| 1458 | static DECLCALLBACK(bool) rtDvmVfsChain_CanReuseElement(PCRTVFSCHAINELEMENTREG pProviderReg,
|
---|
| 1459 | PCRTVFSCHAINSPEC pSpec, PCRTVFSCHAINELEMSPEC pElement,
|
---|
| 1460 | PCRTVFSCHAINSPEC pReuseSpec, PCRTVFSCHAINELEMSPEC pReuseElement)
|
---|
| 1461 | {
|
---|
| 1462 | RT_NOREF(pProviderReg, pSpec, pElement, pReuseSpec, pReuseElement);
|
---|
| 1463 | return false;
|
---|
| 1464 | }
|
---|
| 1465 |
|
---|
| 1466 |
|
---|
| 1467 | /** VFS chain element 'file'. */
|
---|
| 1468 | static RTVFSCHAINELEMENTREG g_rtVfsChainIsoFsVolReg =
|
---|
| 1469 | {
|
---|
| 1470 | /* uVersion = */ RTVFSCHAINELEMENTREG_VERSION,
|
---|
| 1471 | /* fReserved = */ 0,
|
---|
| 1472 | /* pszName = */ "dvm",
|
---|
| 1473 | /* ListEntry = */ { NULL, NULL },
|
---|
[69616] | 1474 | /* pszHelp = */ "Opens a container image using the VD API.\n"
|
---|
| 1475 | "Optionally takes one parameter 'ro' (read only) or 'rw' (read write).\n",
|
---|
[69609] | 1476 | /* pfnValidate = */ rtDvmVfsChain_Validate,
|
---|
| 1477 | /* pfnInstantiate = */ rtDvmVfsChain_Instantiate,
|
---|
| 1478 | /* pfnCanReuseElement = */ rtDvmVfsChain_CanReuseElement,
|
---|
| 1479 | /* uEndMarker = */ RTVFSCHAINELEMENTREG_VERSION
|
---|
| 1480 | };
|
---|
| 1481 |
|
---|
| 1482 | RTVFSCHAIN_AUTO_REGISTER_ELEMENT_PROVIDER(&g_rtVfsChainIsoFsVolReg, rtVfsChainIsoFsVolReg);
|
---|
| 1483 |
|
---|