dvmgpt.cpp@ 76553

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1	/* $Id: dvmgpt.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
2	/** @file
3	* IPRT Disk Volume Management API (DVM) - GPT format backend.
4	*/
5
6	/*
7	* Copyright (C) 2011-2019 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*********************************************************************************************************************************
29	* Header Files *
30	*********************************************************************************************************************************/
31	#include <iprt/dvm.h>
32
33	#include <iprt/assert.h>
34	#include <iprt/asm.h>
35	#include <iprt/mem.h>
36	#include <iprt/string.h>
37	#include <iprt/utf16.h>
38	#include <iprt/uuid.h>
39	#include "internal/dvm.h"
40
41
42	/*********************************************************************************************************************************
43	* Structures and Typedefs *
44	*********************************************************************************************************************************/
45	/** The GPT signature. */
46	#define RTDVM_GPT_SIGNATURE "EFI PART"
47
48	/**
49	* GPT on disk header.
50	*/
51	typedef struct GPTHDR
52	{
53	/** 0x00: Signature ("EFI PART"). */
54	char abSignature[8];
55	/** 0x08: Revision. */
56	uint32_t u32Revision;
57	/** 0x0c: Header size. */
58	uint32_t cbHeader;
59	/** 0x10: CRC of header. */
60	uint32_t u32Crc;
61	} GPTHDR;
62	/** Pointer to a GPT header. */
63	typedef struct GPTHDR *PGPTHDR;
64	AssertCompileSize(GPTHDR, 20);
65
66	/**
67	* Complete GPT table header for revision 1.0.
68	*/
69	#pragma pack(1)
70	typedef struct GPTHDRREV1
71	{
72	/** 0x00: Header. */
73	GPTHDR Hdr;
74	/** 0x14: Reserved. */
75	uint32_t u32Reserved;
76	/** 0x18: Current LBA. */
77	uint64_t u64LbaCurrent;
78	/** 0x20: Backup LBA. */
79	uint64_t u64LbaBackup;
80	/** 0x28:First usable LBA for partitions. */
81	uint64_t u64LbaFirstPartition;
82	/** 0x30: Last usable LBA for partitions. */
83	uint64_t u64LbaLastPartition;
84	/** 0x38: Disk UUID. */
85	RTUUID DiskUuid;
86	/** 0x48: LBA of first partition entry. */
87	uint64_t u64LbaPartitionEntries;
88	/** 0x50: Number of partition entries. */
89	uint32_t cPartitionEntries;
90	/** 0x54: Partition entry size. */
91	uint32_t cbPartitionEntry;
92	/** 0x58: CRC of partition entries. */
93	uint32_t u32CrcPartitionEntries;
94	} GPTHDRREV1;
95	/** Pointer to a revision 1.0 GPT header. */
96	typedef GPTHDRREV1 *PGPTHDRREV1;
97	#pragma pack()
98	AssertCompileSize(GPTHDRREV1, 92);
99
100	/**
101	* GPT partition table entry.
102	*/
103	typedef struct GPTENTRY
104	{
105	/** 0x00: Partition type UUID. */
106	RTUUID UuidType;
107	/** 0x10: Partition UUID. */
108	RTUUID UuidPartition;
109	/** 0x20: First LBA. */
110	uint64_t u64LbaFirst;
111	/** 0x28: Last LBA. */
112	uint64_t u64LbaLast;
113	/** 0x30: Attribute flags. */
114	uint64_t u64Flags;
115	/** 0x38: Partition name (UTF-16LE code units). */
116	RTUTF16 aPartitionName[36];
117	} GPTENTRY;
118	/** Pointer to a GPT entry. */
119	typedef struct GPTENTRY *PGPTENTRY;
120	AssertCompileSize(GPTENTRY, 128);
121
122	/** Partition flags - System partition. */
123	#define RTDVM_GPT_ENTRY_SYSTEM RT_BIT_64(0)
124	/** Partition flags - Partition is readonly. */
125	#define RTDVM_GPT_ENTRY_READONLY RT_BIT_64(60)
126	/** Partition flags - Partition is hidden. */
127	#define RTDVM_GPT_ENTRY_HIDDEN RT_BIT_64(62)
128	/** Partition flags - Don't automount this partition. */
129	#define RTDVM_GPT_ENTRY_NO_AUTOMOUNT RT_BIT_64(63)
130
131	/**
132	* GPT volume manager data.
133	*/
134	typedef struct RTDVMFMTINTERNAL
135	{
136	/** Pointer to the underlying disk. */
137	PCRTDVMDISK pDisk;
138	/** GPT header. */
139	GPTHDRREV1 HdrRev1;
140	/** GPT array. */
141	PGPTENTRY paGptEntries;
142	/** Number of occupied partition entries. */
143	uint32_t cPartitions;
144	} RTDVMFMTINTERNAL;
145	/** Pointer to the MBR volume manager. */
146	typedef RTDVMFMTINTERNAL *PRTDVMFMTINTERNAL;
147
148	/**
149	* GPT volume data.
150	*/
151	typedef struct RTDVMVOLUMEFMTINTERNAL
152	{
153	/** Pointer to the volume manager. */
154	PRTDVMFMTINTERNAL pVolMgr;
155	/** Partition table entry index. */
156	uint32_t idxEntry;
157	/** Start offset of the volume. */
158	uint64_t offStart;
159	/** Size of the volume. */
160	uint64_t cbVolume;
161	/** Pointer to the GPT entry in the array. */
162	PGPTENTRY pGptEntry;
163	} RTDVMVOLUMEFMTINTERNAL;
164	/** Pointer to an MBR volume. */
165	typedef RTDVMVOLUMEFMTINTERNAL *PRTDVMVOLUMEFMTINTERNAL;
166
167	/**
168	* GPT partition type to DVM volume type mapping entry.
169	*/
170
171	typedef struct RTDVMGPTPARTTYPE2VOLTYPE
172	{
173	/** Type UUID. */
174	const char *pcszUuid;
175	/** DVM volume type. */
176	RTDVMVOLTYPE enmVolType;
177	} RTDVMGPTPARTTYPE2VOLTYPE;
178	/** Pointer to a MBR FS Type to volume type mapping entry. */
179	typedef RTDVMGPTPARTTYPE2VOLTYPE *PRTDVMGPTPARTTYPE2VOLTYPE;
180
181	/** Converts a LBA number to the byte offset. */
182	#define RTDVM_GPT_LBA2BYTE(lba, disk) ((lba) * (disk)->cbSector)
183	/** Converts a Byte offset to the LBA number. */
184	#define RTDVM_GPT_BYTE2LBA(lba, disk) ((lba) / (disk)->cbSector)
185
186
187	/*********************************************************************************************************************************
188	* Global Variables *
189	*********************************************************************************************************************************/
190	/**
191	* Mapping of partition types to DVM volume types.
192	*
193	* From http://en.wikipedia.org/wiki/GUID_Partition_Table
194	*/
195	static const RTDVMGPTPARTTYPE2VOLTYPE g_aPartType2DvmVolTypes[] =
196	{
197	{ "C12A7328-F81F-11D2-BA4B-00A0C93EC93B", RTDVMVOLTYPE_EFI_SYSTEM },
198
199	{ "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", RTDVMVOLTYPE_WIN_BASIC },
200	{ "E3C9E316-0B5C-4DB8-817D-F92DF00215AE", RTDVMVOLTYPE_WIN_MSR },
201	{ "5808C8AA-7E8F-42E0-85D2-E1E90434CFB3", RTDVMVOLTYPE_WIN_LDM_META },
202	{ "AF9B60A0-1431-4F62-BC68-3311714A69AD", RTDVMVOLTYPE_WIN_LDM_DATA },
203	{ "DE94BBA4-06D1-4D40-A16A-BFD50179D6AC", RTDVMVOLTYPE_WIN_RECOVERY },
204	{ "E75CAF8F-F680-4CEE-AFA3-B001E56EFC2D", RTDVMVOLTYPE_WIN_STORAGE_SPACES },
205
206	{ "0657FD6D-A4AB-43C4-84E5-0933C84B4F4F", RTDVMVOLTYPE_LINUX_SWAP },
207	{ "0FC63DAF-8483-4772-8E79-3D69D8477DE4", RTDVMVOLTYPE_LINUX_NATIVE },
208	{ "44479540-F297-41B2-9AF7-D131D5F0458A", RTDVMVOLTYPE_LINUX_NATIVE }, /* x86 root */
209	{ "4F68BCE3-E8CD-4DB1-96E7-FBCAF984B709", RTDVMVOLTYPE_LINUX_NATIVE }, /* AMD64 root */
210	{ "69DAD710-2CE4-4E3C-B16C-21A1D49ABED3", RTDVMVOLTYPE_LINUX_NATIVE }, /* ARM32 root */
211	{ "B921B045-1DF0-41C3-AF44-4C6F280D3FAE", RTDVMVOLTYPE_LINUX_NATIVE }, /* ARM64 root */
212	{ "E6D6D379-F507-44C2-A23C-238F2A3DF928", RTDVMVOLTYPE_LINUX_LVM },
213	{ "A19D880F-05FC-4D3B-A006-743F0F84911E", RTDVMVOLTYPE_LINUX_SOFTRAID },
214
215	{ "83BD6B9D-7F41-11DC-BE0B-001560B84F0F", RTDVMVOLTYPE_FREEBSD }, /* Boot */
216	{ "516E7CB4-6ECF-11D6-8FF8-00022D09712B", RTDVMVOLTYPE_FREEBSD }, /* Data */
217	{ "516E7CB5-6ECF-11D6-8FF8-00022D09712B", RTDVMVOLTYPE_FREEBSD }, /* Swap */
218	{ "516E7CB6-6ECF-11D6-8FF8-00022D09712B", RTDVMVOLTYPE_FREEBSD }, /* UFS */
219	{ "516E7CB8-6ECF-11D6-8FF8-00022D09712B", RTDVMVOLTYPE_FREEBSD }, /* Vinum */
220	{ "516E7CBA-6ECF-11D6-8FF8-00022D09712B", RTDVMVOLTYPE_FREEBSD }, /* ZFS */
221
222	{ "49F48D32-B10E-11DC-B99B-0019D1879648", RTDVMVOLTYPE_NETBSD }, /* Swap */
223	{ "49F48D5A-B10E-11DC-B99B-0019D1879648", RTDVMVOLTYPE_NETBSD }, /* FFS */
224	{ "49F48D82-B10E-11DC-B99B-0019D1879648", RTDVMVOLTYPE_NETBSD }, /* LFS */
225	{ "49F48DAA-B10E-11DC-B99B-0019D1879648", RTDVMVOLTYPE_NETBSD }, /* Raid */
226	{ "2DB519C4-B10F-11DC-B99B-0019D1879648", RTDVMVOLTYPE_NETBSD }, /* Concatenated */
227	{ "2DB519EC-B10F-11DC-B99B-0019D1879648", RTDVMVOLTYPE_NETBSD }, /* Encrypted */
228
229	{ "48465300-0000-11AA-AA11-00306543ECAC", RTDVMVOLTYPE_DARWIN_HFS },
230	{ "7C3457EF-0000-11AA-AA11-00306543ECAC", RTDVMVOLTYPE_DARWIN_APFS },
231
232	{ "6A82CB45-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* Boot */
233	{ "6A85CF4D-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* Root */
234	{ "6A87C46F-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* Swap */
235	{ "6A8B642B-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* Backup */
236	{ "6A898CC3-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* /usr */
237	{ "6A8EF2E9-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* /var */
238	{ "6A90BA39-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* /home */
239	{ "6A9283A5-1DD2-11B2-99A6-080020736631", RTDVMVOLTYPE_SOLARIS }, /* Alternate sector */
240
241	{ "37AFFC90-EF7D-4E96-91C3-2D7AE055B174", RTDVMVOLTYPE_IBM_GPFS },
242	};
243
244	static DECLCALLBACK(int) rtDvmFmtGptProbe(PCRTDVMDISK pDisk, uint32_t *puScore)
245	{
246	int rc = VINF_SUCCESS;
247	GPTHDR Hdr;
248
249	*puScore = RTDVM_MATCH_SCORE_UNSUPPORTED;
250
251	if (rtDvmDiskGetSectors(pDisk) >= 2)
252	{
253	/* Read from the disk and check for the signature. */
254	rc = rtDvmDiskRead(pDisk, RTDVM_GPT_LBA2BYTE(1, pDisk), &Hdr, sizeof(GPTHDR));
255	if ( RT_SUCCESS(rc)
256	&& !strncmp(&Hdr.abSignature[0], RTDVM_GPT_SIGNATURE, RT_ELEMENTS(Hdr.abSignature))
257	&& RT_LE2H_U32(Hdr.u32Revision) == 0x00010000
258	&& RT_LE2H_U32(Hdr.cbHeader) == sizeof(GPTHDRREV1))
259	*puScore = RTDVM_MATCH_SCORE_PERFECT;
260	}
261
262	return rc;
263	}
264
265	static DECLCALLBACK(int) rtDvmFmtGptOpen(PCRTDVMDISK pDisk, PRTDVMFMT phVolMgrFmt)
266	{
267	int rc = VINF_SUCCESS;
268	PRTDVMFMTINTERNAL pThis = NULL;
269
270	pThis = (PRTDVMFMTINTERNAL)RTMemAllocZ(sizeof(RTDVMFMTINTERNAL));
271	if (pThis)
272	{
273	pThis->pDisk = pDisk;
274	pThis->cPartitions = 0;
275
276	/* Read the complete GPT header and convert to host endianess. */
277	rc = rtDvmDiskRead(pDisk, RTDVM_GPT_LBA2BYTE(1, pDisk), &pThis->HdrRev1, sizeof(pThis->HdrRev1));
278	if (RT_SUCCESS(rc))
279	{
280	pThis->HdrRev1.Hdr.u32Revision = RT_LE2H_U32(pThis->HdrRev1.Hdr.u32Revision);
281	pThis->HdrRev1.Hdr.cbHeader = RT_LE2H_U32(pThis->HdrRev1.Hdr.cbHeader);
282	pThis->HdrRev1.Hdr.u32Crc = RT_LE2H_U32(pThis->HdrRev1.Hdr.u32Crc);
283	pThis->HdrRev1.u64LbaCurrent = RT_LE2H_U64(pThis->HdrRev1.u64LbaCurrent);
284	pThis->HdrRev1.u64LbaBackup = RT_LE2H_U64(pThis->HdrRev1.u64LbaBackup);
285	pThis->HdrRev1.u64LbaFirstPartition = RT_LE2H_U64(pThis->HdrRev1.u64LbaFirstPartition);
286	pThis->HdrRev1.u64LbaLastPartition = RT_LE2H_U64(pThis->HdrRev1.u64LbaLastPartition);
287	/** @todo Disk UUID */
288	pThis->HdrRev1.u64LbaPartitionEntries = RT_LE2H_U64(pThis->HdrRev1.u64LbaPartitionEntries);
289	pThis->HdrRev1.cPartitionEntries = RT_LE2H_U32(pThis->HdrRev1.cPartitionEntries);
290	pThis->HdrRev1.cbPartitionEntry = RT_LE2H_U32(pThis->HdrRev1.cbPartitionEntry);
291	pThis->HdrRev1.u32CrcPartitionEntries = RT_LE2H_U32(pThis->HdrRev1.u32CrcPartitionEntries);
292
293	if (pThis->HdrRev1.cbPartitionEntry == sizeof(GPTENTRY))
294	{
295	pThis->paGptEntries = (PGPTENTRY)RTMemAllocZ(pThis->HdrRev1.cPartitionEntries * pThis->HdrRev1.cbPartitionEntry);
296	if (pThis->paGptEntries)
297	{
298	rc = rtDvmDiskRead(pDisk, RTDVM_GPT_LBA2BYTE(pThis->HdrRev1.u64LbaPartitionEntries, pDisk),
299	pThis->paGptEntries, pThis->HdrRev1.cPartitionEntries * pThis->HdrRev1.cbPartitionEntry);
300	if (RT_SUCCESS(rc))
301	{
302	/* Count the occupied entries. */
303	for (unsigned i = 0; i < pThis->HdrRev1.cPartitionEntries; i++)
304	if (!RTUuidIsNull(&pThis->paGptEntries[i].UuidType))
305	{
306	/* Convert to host endianess. */
307	/** @todo Uuids */
308	pThis->paGptEntries[i].u64LbaFirst = RT_LE2H_U64(pThis->paGptEntries[i].u64LbaFirst);
309	pThis->paGptEntries[i].u64LbaLast = RT_LE2H_U64(pThis->paGptEntries[i].u64LbaLast);
310	pThis->paGptEntries[i].u64Flags = RT_LE2H_U64(pThis->paGptEntries[i].u64Flags);
311	for (unsigned cwc = 0; cwc < RT_ELEMENTS(pThis->paGptEntries[i].aPartitionName); cwc++)
312	pThis->paGptEntries[i].aPartitionName[cwc] = RT_LE2H_U16(pThis->paGptEntries[i].aPartitionName[cwc]);
313
314	pThis->cPartitions++;
315	}
316	}
317
318	if (RT_FAILURE(rc))
319	RTMemFree(pThis->paGptEntries);
320	}
321	else
322	rc = VERR_NO_MEMORY;
323	}
324	else
325	rc = VERR_NOT_SUPPORTED;
326
327	if (RT_SUCCESS(rc))
328	*phVolMgrFmt = pThis;
329	else
330	RTMemFree(pThis);
331	}
332	}
333	else
334	rc = VERR_NO_MEMORY;
335
336	return rc;
337	}
338
339	static DECLCALLBACK(int) rtDvmFmtGptInitialize(PCRTDVMDISK pDisk, PRTDVMFMT phVolMgrFmt)
340	{
341	NOREF(pDisk); NOREF(phVolMgrFmt);
342	return VERR_NOT_IMPLEMENTED;
343	}
344
345	static DECLCALLBACK(void) rtDvmFmtGptClose(RTDVMFMT hVolMgrFmt)
346	{
347	PRTDVMFMTINTERNAL pThis = hVolMgrFmt;
348
349	pThis->pDisk = NULL;
350	memset(&pThis->HdrRev1, 0, sizeof(pThis->HdrRev1));
351	RTMemFree(pThis->paGptEntries);
352
353	pThis->paGptEntries = NULL;
354	RTMemFree(pThis);
355	}
356
357	static DECLCALLBACK(int) rtDvmFmtGptQueryRangeUse(RTDVMFMT hVolMgrFmt,
358	uint64_t off, uint64_t cbRange,
359	bool *pfUsed)
360	{
361	PRTDVMFMTINTERNAL pThis = hVolMgrFmt;
362
363	NOREF(cbRange);
364
365	if (off < 33*pThis->pDisk->cbSector)
366	*pfUsed = true;
367	else
368	*pfUsed = false;
369
370	return VINF_SUCCESS;
371	}
372
373	static DECLCALLBACK(uint32_t) rtDvmFmtGptGetValidVolumes(RTDVMFMT hVolMgrFmt)
374	{
375	PRTDVMFMTINTERNAL pThis = hVolMgrFmt;
376
377	return pThis->cPartitions;
378	}
379
380	static DECLCALLBACK(uint32_t) rtDvmFmtGptGetMaxVolumes(RTDVMFMT hVolMgrFmt)
381	{
382	PRTDVMFMTINTERNAL pThis = hVolMgrFmt;
383
384	return pThis->HdrRev1.cPartitionEntries;
385	}
386
387	/**
388	* Creates a new volume.
389	*
390	* @returns IPRT status code.
391	* @param pThis The MBR volume manager data.
392	* @param pGptEntry The GPT entry.
393	* @param idx The index in the partition array.
394	* @param phVolFmt Where to store the volume data on success.
395	*/
396	static int rtDvmFmtMbrVolumeCreate(PRTDVMFMTINTERNAL pThis, PGPTENTRY pGptEntry,
397	uint32_t idx, PRTDVMVOLUMEFMT phVolFmt)
398	{
399	int rc = VINF_SUCCESS;
400	PRTDVMVOLUMEFMTINTERNAL pVol = (PRTDVMVOLUMEFMTINTERNAL)RTMemAllocZ(sizeof(RTDVMVOLUMEFMTINTERNAL));
401
402	if (pVol)
403	{
404	pVol->pVolMgr = pThis;
405	pVol->idxEntry = idx;
406	pVol->pGptEntry = pGptEntry;
407	pVol->offStart = RTDVM_GPT_LBA2BYTE(pGptEntry->u64LbaFirst, pThis->pDisk);
408	pVol->cbVolume = RTDVM_GPT_LBA2BYTE(pGptEntry->u64LbaLast - pGptEntry->u64LbaFirst + 1, pThis->pDisk);
409
410	*phVolFmt = pVol;
411	}
412	else
413	rc = VERR_NO_MEMORY;
414
415	return rc;
416	}
417
418	static DECLCALLBACK(int) rtDvmFmtGptQueryFirstVolume(RTDVMFMT hVolMgrFmt, PRTDVMVOLUMEFMT phVolFmt)
419	{
420	PRTDVMFMTINTERNAL pThis = hVolMgrFmt;
421
422	if (pThis->cPartitions != 0)
423	{
424	PGPTENTRY pGptEntry = &pThis->paGptEntries[0];
425
426	/* Search for the first non empty entry. */
427	for (unsigned i = 0; i < pThis->HdrRev1.cPartitionEntries; i++)
428	{
429	if (!RTUuidIsNull(&pGptEntry->UuidType))
430	return rtDvmFmtMbrVolumeCreate(pThis, pGptEntry, i, phVolFmt);
431	pGptEntry++;
432	}
433	AssertFailed();
434	}
435	return VERR_DVM_MAP_EMPTY;
436	}
437
438	static DECLCALLBACK(int) rtDvmFmtGptQueryNextVolume(RTDVMFMT hVolMgrFmt, RTDVMVOLUMEFMT hVolFmt, PRTDVMVOLUMEFMT phVolFmtNext)
439	{
440	PRTDVMFMTINTERNAL pThis = hVolMgrFmt;
441	PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt;
442	PGPTENTRY pGptEntry = pVol->pGptEntry + 1;
443
444	for (unsigned i = pVol->idxEntry + 1; i < pThis->HdrRev1.cPartitionEntries; i++)
445	{
446	if (!RTUuidIsNull(&pGptEntry->UuidType))
447	return rtDvmFmtMbrVolumeCreate(pThis, pGptEntry, i, phVolFmtNext);
448	pGptEntry++;
449	}
450
451	return VERR_DVM_MAP_NO_VOLUME;
452	}
453
454	static DECLCALLBACK(void) rtDvmFmtGptVolumeClose(RTDVMVOLUMEFMT hVolFmt)
455	{
456	PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt;
457
458	pVol->pVolMgr = NULL;
459	pVol->offStart = 0;
460	pVol->cbVolume = 0;
461	pVol->pGptEntry = NULL;
462
463	RTMemFree(pVol);
464	}
465
466	static DECLCALLBACK(uint64_t) rtDvmFmtGptVolumeGetSize(RTDVMVOLUMEFMT hVolFmt)
467	{
468	PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt;
469
470	return pVol->cbVolume;
471	}
472
473	static DECLCALLBACK(int) rtDvmFmtGptVolumeQueryName(RTDVMVOLUMEFMT hVolFmt, char **ppszVolName)
474	{
475	PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt;
476
477	*ppszVolName = NULL;
478	return RTUtf16ToUtf8Ex(&pVol->pGptEntry->aPartitionName[0], RT_ELEMENTS(pVol->pGptEntry->aPartitionName),
479	ppszVolName, 0, NULL);
480	}
481
482	static DECLCALLBACK(RTDVMVOLTYPE) rtDvmFmtGptVolumeGetType(RTDVMVOLUMEFMT hVolFmt)
483	{
484	PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt;
485
486	for (unsigned i = 0; i < RT_ELEMENTS(g_aPartType2DvmVolTypes); i++)
487	if (!RTUuidCompareStr(&pVol->pGptEntry->UuidType, g_aPartType2DvmVolTypes[i].pcszUuid))
488	return g_aPartType2DvmVolTypes[i].enmVolType;
489
490	return RTDVMVOLTYPE_UNKNOWN;
491	}
492
493	static DECLCALLBACK(uint64_t) rtDvmFmtGptVolumeGetFlags(RTDVMVOLUMEFMT hVolFmt)
494	{
495	NOREF(hVolFmt); /* No supported flags for now. */
496	return 0;
497	}
498
499	static DECLCALLBACK(bool) rtDvmFmtGptVolumeIsRangeIntersecting(RTDVMVOLUMEFMT hVolFmt,
500	uint64_t offStart, size_t cbRange,
501	uint64_t *poffVol,
502	uint64_t *pcbIntersect)
503	{
504	PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt;
505
506	if (RTDVM_RANGE_IS_INTERSECTING(pVol->offStart, pVol->cbVolume, offStart))
507	{
508	*poffVol = offStart - pVol->offStart;
509	*pcbIntersect = RT_MIN(cbRange, pVol->offStart + pVol->cbVolume - offStart);
510	return true;
511	}
512	return false;
513	}
514
515	static DECLCALLBACK(int) rtDvmFmtGptVolumeRead(RTDVMVOLUMEFMT hVolFmt, uint64_t off, void *pvBuf, size_t cbRead)
516	{
517	PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt;
518	AssertReturn(off + cbRead <= pVol->cbVolume, VERR_INVALID_PARAMETER);
519
520	return rtDvmDiskRead(pVol->pVolMgr->pDisk, pVol->offStart + off, pvBuf, cbRead);
521	}
522
523	static DECLCALLBACK(int) rtDvmFmtGptVolumeWrite(RTDVMVOLUMEFMT hVolFmt, uint64_t off, const void *pvBuf, size_t cbWrite)
524	{
525	PRTDVMVOLUMEFMTINTERNAL pVol = hVolFmt;
526	AssertReturn(off + cbWrite <= pVol->cbVolume, VERR_INVALID_PARAMETER);
527
528	return rtDvmDiskWrite(pVol->pVolMgr->pDisk, pVol->offStart + off, pvBuf, cbWrite);
529	}
530
531	RTDVMFMTOPS g_rtDvmFmtGpt =
532	{
533	/* pszFmt */
534	"GPT",
535	/* enmFormat, */
536	RTDVMFORMATTYPE_GPT,
537	/* pfnProbe */
538	rtDvmFmtGptProbe,
539	/* pfnOpen */
540	rtDvmFmtGptOpen,
541	/* pfnInitialize */
542	rtDvmFmtGptInitialize,
543	/* pfnClose */
544	rtDvmFmtGptClose,
545	/* pfnQueryRangeUse */
546	rtDvmFmtGptQueryRangeUse,
547	/* pfnGetValidVolumes */
548	rtDvmFmtGptGetValidVolumes,
549	/* pfnGetMaxVolumes */
550	rtDvmFmtGptGetMaxVolumes,
551	/* pfnQueryFirstVolume */
552	rtDvmFmtGptQueryFirstVolume,
553	/* pfnQueryNextVolume */
554	rtDvmFmtGptQueryNextVolume,
555	/* pfnVolumeClose */
556	rtDvmFmtGptVolumeClose,
557	/* pfnVolumeGetSize */
558	rtDvmFmtGptVolumeGetSize,
559	/* pfnVolumeQueryName */
560	rtDvmFmtGptVolumeQueryName,
561	/* pfnVolumeGetType */
562	rtDvmFmtGptVolumeGetType,
563	/* pfnVolumeGetFlags */
564	rtDvmFmtGptVolumeGetFlags,
565	/* pfnVolumeIsRangeIntersecting */
566	rtDvmFmtGptVolumeIsRangeIntersecting,
567	/* pfnVolumeRead */
568	rtDvmFmtGptVolumeRead,
569	/* pfnVolumeWrite */
570	rtDvmFmtGptVolumeWrite
571	};
572

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source: vbox/trunk/src/VBox/Runtime/common/dvm/dvmgpt.cpp@ 76553

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