1 /*
2 Bacula® - The Network Backup Solution
3
4 Copyright (C) 2005-2008 Free Software Foundation Europe e.V.
5
6 The main author of Bacula is Kern Sibbald, with contributions from
7 many others, a complete list can be found in the file AUTHORS.
8 This program is Free Software; you can redistribute it and/or
9 modify it under the terms of version three of the GNU Affero General Public
10 License as published by the Free Software Foundation and included
11 in the file LICENSE.
12
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
17
18 You should have received a copy of the GNU Affero General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 02110-1301, USA.
22
23 Bacula® is a registered trademark of Kern Sibbald.
24 The licensor of Bacula is the Free Software Foundation Europe
25 (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
26 Switzerland, email:ftf@fsfeurope.org.
27 */
28 // vss.cpp -- Interface to Volume Shadow Copies (VSS)
29 //
30 // Copyright transferred from MATRIX-Computer GmbH to
31 // Kern Sibbald by express permission.
32 //
33 // Author : Thorsten Engel
34 // Created On : Fri May 06 21:44:00 2005
35
36
37 #ifdef WIN32_VSS
38 #include "burp.h"
39 #include "compat.h"
40
41 #include "ms_atl.h"
42 #include <objbase.h>
43
44 #include "vss.h"
45 #include "alist.h"
46
47 VSSClient *g_pVSSClient;
48
49 // {b5946137-7b9f-4925-af80-51abd60b20d5}
50
51 static const GUID VSS_SWPRV_ProviderID = {
52 0xb5946137, 0x7b9f, 0x4925, {
53 0xaf, 0x80, 0x51, 0xab, 0xd6, 0x0b, 0x20, 0xd5
54 }
55 };
56
57
VSSCleanup(void)58 void VSSCleanup(void)
59 {
60 if(g_pVSSClient) delete (g_pVSSClient);
61 }
62
VSSInit(void)63 int VSSInit(void)
64 {
65 // Decide which vss class to initialize.
66 if(g_MajorVersion==5)
67 {
68 switch(g_MinorVersion)
69 {
70 case 1:
71 g_pVSSClient=new VSSClientXP();
72 atexit(VSSCleanup);
73 return 0;
74 case 2:
75 g_pVSSClient=new VSSClient2003();
76 atexit(VSSCleanup);
77 return 0;
78 }
79 // Vista or Longhorn or later.
80 // } else if(g_MajorVersion==6 && g_MinorVersion==0) {
81 }
82 else if(g_MajorVersion>=6)
83 {
84 g_pVSSClient=new VSSClientVista();
85 atexit(VSSCleanup);
86 return 0;
87 }
88
89 fprintf(stderr, "Unknown VSS version: %d.%d\n",
90 (int)g_MajorVersion, (int)g_MinorVersion);
91 return -1;
92 }
93
VSSPathConvert(const char * szFilePath,char * szShadowPath,int nBuflen)94 BOOL VSSPathConvert(const char *szFilePath,
95 char *szShadowPath, int nBuflen)
96 {
97 return g_pVSSClient->GetShadowPath(szFilePath, szShadowPath, nBuflen);
98 }
99
VSSPathConvertW(const wchar_t * szFilePath,wchar_t * szShadowPath,int nBuflen)100 BOOL VSSPathConvertW(const wchar_t *szFilePath,
101 wchar_t *szShadowPath, int nBuflen)
102 {
103 return g_pVSSClient->GetShadowPathW(szFilePath, szShadowPath, nBuflen);
104 }
105
VSSClient(void)106 VSSClient::VSSClient(void)
107 {
108 m_bCoInitializeCalled=false;
109 m_bCoInitializeSecurityCalled=false;
110 m_bBackupIsInitialized=false;
111 m_pVssObject=NULL;
112 m_pAlistWriterState=new alist(10, not_owned_by_alist);
113 m_pAlistWriterInfoText=new alist(10, owned_by_alist);
114 m_uidCurrentSnapshotSet=GUID_NULL;
115 memset(m_wszUniqueVolumeName, 0, sizeof(m_wszUniqueVolumeName));
116 memset(m_szShadowCopyName, 0, sizeof(m_szShadowCopyName));
117 }
118
~VSSClient(void)119 VSSClient::~VSSClient(void)
120 {
121 // Release the IVssBackupComponents interface
122 // WARNING: this must be done BEFORE calling CoUninitialize()
123 if(m_pVssObject)
124 {
125 m_pVssObject->Release();
126 m_pVssObject=NULL;
127 }
128
129 DestroyWriterInfo();
130 delete (alist*)m_pAlistWriterState;
131 delete (alist*)m_pAlistWriterInfoText;
132
133 // Call CoUninitialize if the CoInitialize was performed successfully
134 if(m_bCoInitializeCalled) CoUninitialize();
135 }
136
InitializeForBackup(struct asfd * asfd,struct cntr * cntr)137 BOOL VSSClient::InitializeForBackup(struct asfd *asfd, struct cntr *cntr)
138 {
139 return Initialize(asfd, cntr);
140 }
141
bstrncat(char * dest,const char * src,int maxlen)142 static char *bstrncat(char *dest, const char *src, int maxlen)
143 {
144 strncat(dest, src, maxlen-1);
145 dest[maxlen-1]=0;
146 return dest;
147 }
148
GetShadowPath(const char * szFilePath,char * szShadowPath,int nBuflen)149 BOOL VSSClient::GetShadowPath(const char *szFilePath,
150 char *szShadowPath, int nBuflen)
151 {
152 if(!m_bBackupIsInitialized) return FALSE;
153
154 // check for valid pathname.
155 BOOL bIsValidName;
156
157 bIsValidName=strlen(szFilePath)>3;
158 if(bIsValidName)
159 bIsValidName &= isalpha(szFilePath[0]) &&
160 szFilePath[1]==':' &&
161 szFilePath[2]=='\\';
162
163 if(bIsValidName)
164 {
165 int nDriveIndex=toupper(szFilePath[0])-'A';
166 if(m_szShadowCopyName[nDriveIndex][0])
167 {
168
169 if(WideCharToMultiByte(CP_UTF8, 0,
170 m_szShadowCopyName[nDriveIndex], -1, szShadowPath,
171 nBuflen-1, NULL, NULL))
172 {
173 nBuflen-=(int)strlen(szShadowPath);
174 bstrncat(szShadowPath, szFilePath+2, nBuflen);
175 return TRUE;
176 }
177 }
178 }
179
180 snprintf(szShadowPath, nBuflen, "%s", szFilePath);
181 errno=EINVAL;
182 return FALSE;
183 }
184
GetShadowPathW(const wchar_t * szFilePath,wchar_t * szShadowPath,int nBuflen)185 BOOL VSSClient::GetShadowPathW(const wchar_t *szFilePath,
186 wchar_t *szShadowPath, int nBuflen)
187 {
188 if(!m_bBackupIsInitialized) return FALSE;
189
190 // check for valid pathname.
191 BOOL bIsValidName;
192
193 bIsValidName=wcslen(szFilePath)>3;
194 if(bIsValidName)
195 bIsValidName &= iswalpha(szFilePath[0]) &&
196 szFilePath[1]==':' &&
197 szFilePath[2] == '\\';
198
199 if(bIsValidName)
200 {
201 int nDriveIndex=towupper(szFilePath[0])-'A';
202 if(m_szShadowCopyName[nDriveIndex][0])
203 {
204 wcsncpy(szShadowPath,
205 m_szShadowCopyName[nDriveIndex], nBuflen);
206 nBuflen-=(int)wcslen(m_szShadowCopyName[nDriveIndex]);
207 wcsncat(szShadowPath, szFilePath+2, nBuflen);
208 return TRUE;
209 }
210 }
211
212 wcsncpy(szShadowPath, szFilePath, nBuflen);
213 errno=EINVAL;
214 return FALSE;
215 }
216
217
GetWriterCount(void)218 const size_t VSSClient::GetWriterCount(void)
219 {
220 alist *pV=(alist *)m_pAlistWriterInfoText;
221 return pV->size();
222 }
223
GetWriterInfo(int nIndex)224 const char* VSSClient::GetWriterInfo(int nIndex)
225 {
226 alist* pV=(alist*)m_pAlistWriterInfoText;
227 return (char*)pV->get(nIndex);
228 }
229
GetWriterState(int nIndex)230 const int VSSClient::GetWriterState(int nIndex)
231 {
232 alist *pV=(alist *)m_pAlistWriterState;
233 return (intptr_t)pV->get(nIndex);
234 }
235
AppendWriterInfo(int nState,const char * pszInfo)236 void VSSClient::AppendWriterInfo(int nState, const char *pszInfo)
237 {
238 alist *pT=(alist *)m_pAlistWriterInfoText;
239 alist *pS=(alist *)m_pAlistWriterState;
240
241 pT->push(strdup(pszInfo));
242 pS->push((void*)(intptr_t)nState);
243 }
244
DestroyWriterInfo(void)245 void VSSClient::DestroyWriterInfo(void)
246 {
247 alist *pT=(alist *)m_pAlistWriterInfoText;
248 alist *pS=(alist *)m_pAlistWriterState;
249
250 while(!pT->empty()) free(pT->pop());
251 while(!pS->empty()) pS->pop();
252 }
253
254 #endif
255