1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
/* $Id: VBoxSF.cpp $ */
/** @file
* VBoxSF - Darwin Shared Folders, KEXT entry points.
*/
/*
* Copyright (C) 2013-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_SHARED_FOLDERS
#include "VBoxSFInternal.h"
#include <iprt/asm.h>
#include <iprt/assert.h>
#include <iprt/initterm.h>
#include <VBox/version.h>
#include <VBox/log.h>
/*********************************************************************************************************************************
* Internal Functions *
*********************************************************************************************************************************/
static kern_return_t vboxSfDwnModuleLoad(struct kmod_info *pKModInfo, void *pvData);
static kern_return_t vboxSfDwnModuleUnload(struct kmod_info *pKModInfo, void *pvData);
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
/** The VBoxGuest service if we've managed to connect to it already. */
static IOService *g_pVBoxGuest = NULL;
/** The shared folder service client structure. */
VBGLSFCLIENT g_SfClientDarwin = { UINT32_MAX, NULL };
/** Number of active mounts. Used for unload prevention. */
uint32_t volatile g_cVBoxSfMounts = 0;
/** VFS table entry for our file system (for vfs_fsremove). */
static vfstable_t g_pVBoxSfVfsTableEntry;
/** For vfs_fsentry. */
static struct vnodeopv_desc *g_apVBoxSfVnodeOpDescList[] =
{
&g_VBoxSfVnodeOpvDesc,
};
/** VFS registration structure. */
static struct vfs_fsentry g_VBoxSfFsEntry =
{
.vfe_vfsops = &g_VBoxSfVfsOps,
.vfe_vopcnt = RT_ELEMENTS(g_apVBoxSfVnodeOpDescList),
.vfe_opvdescs = g_apVBoxSfVnodeOpDescList,
.vfe_fstypenum = -1,
.vfe_fsname = VBOXSF_DARWIN_FS_NAME,
.vfe_flags = VFS_TBLTHREADSAFE /* Required. */
| VFS_TBLFSNODELOCK /* Required. */
| VFS_TBLNOTYPENUM /* No historic file system number. */
| VFS_TBL64BITREADY, /* Can handle 64-bit processes */
/** @todo add VFS_TBLREADDIR_EXTENDED */
.vfe_reserv = { NULL, NULL },
};
/**
* Declare the module stuff.
*/
RT_C_DECLS_BEGIN
extern kern_return_t _start(struct kmod_info *pKModInfo, void *pvData);
extern kern_return_t _stop(struct kmod_info *pKModInfo, void *pvData);
KMOD_EXPLICIT_DECL(VBoxSF, VBOX_VERSION_STRING, _start, _stop)
DECLHIDDEN(kmod_start_func_t *) _realmain = vboxSfDwnModuleLoad;
DECLHIDDEN(kmod_stop_func_t *) _antimain = vboxSfDwnModuleUnload;
DECLHIDDEN(int) _kext_apple_cc = __APPLE_CC__;
RT_C_DECLS_END
/**
* Connect to VBoxGuest and host shared folders service.
*
* @returns true if connected, false if not.
*/
bool vboxSfDwnConnect(void)
{
/*
* Grab VBoxGuest - since it's a dependency of this module, it shouldn't be hard.
*/
if (!g_pVBoxGuest)
{
OSDictionary *pServiceMatcher = IOService::serviceMatching("org_virtualbox_VBoxGuest");
if (pServiceMatcher)
{
IOService *pVBoxGuest = IOService::waitForMatchingService(pServiceMatcher, 10 * RT_NS_1SEC);
if (pVBoxGuest)
g_pVBoxGuest = pVBoxGuest;
else
LogRel(("vboxSfDwnConnect: IOService::waitForMatchingService failed!!\n"));
}
else
LogRel(("vboxSfDwnConnect: serviceMatching failed\n"));
}
if (g_pVBoxGuest)
{
/*
* Get hold of the shared folders service if we haven't already.
*/
if (g_SfClientDarwin.handle != NULL)
return true;
int rc = VbglR0SfConnect(&g_SfClientDarwin);
if (RT_SUCCESS(rc))
{
rc = VbglR0SfSetUtf8(&g_SfClientDarwin);
if (RT_SUCCESS(rc))
return true;
LogRel(("VBoxSF: VbglR0SfSetUtf8 failed: %Rrc\n", rc));
VbglR0SfDisconnect(&g_SfClientDarwin);
g_SfClientDarwin.handle = NULL;
}
else
LogRel(("VBoxSF: VbglR0SfConnect failed: %Rrc\n", rc));
}
return false;
}
/**
* Start the kernel module.
*/
static kern_return_t vboxSfDwnModuleLoad(struct kmod_info *pKModInfo, void *pvData)
{
RT_NOREF(pKModInfo, pvData);
#ifdef DEBUG
printf("vboxSfDwnModuleLoad\n");
RTLogBackdoorPrintf("vboxSfDwnModuleLoad\n");
#endif
/*
* Initialize IPRT and the ring-0 guest library.
*/
int rc = RTR0Init(0);
if (RT_SUCCESS(rc))
{
rc = VbglR0SfInit();
if (RT_SUCCESS(rc))
{
/*
* Register the file system.
*/
rc = vfs_fsadd(&g_VBoxSfFsEntry, &g_pVBoxSfVfsTableEntry);
if (rc == 0)
{
/*
* Try find VBoxGuest and connect to the shared folders service on the host.
*/
/** @todo should we just ignore the error here and retry at mount time?
* Technically, VBoxGuest should be available since it's one of our
* dependencies... */
vboxSfDwnConnect();
/*
* We're done for now. We'll deal with
*/
LogRel(("VBoxSF: loaded\n"));
return KERN_SUCCESS;
}
printf("VBoxSF: vfs_fsadd failed: %d\n", rc);
RTLogBackdoorPrintf("VBoxSF: vfs_fsadd failed: %d\n", rc);
VbglR0SfTerm();
}
else
{
printf("VBoxSF: VbglR0SfInit failed: %d\n", rc);
RTLogBackdoorPrintf("VBoxSF: VbglR0SfInit failed: %Rrc\n", rc);
}
RTR0Term();
}
else
{
printf("VBoxSF: RTR0Init failed: %d\n", rc);
RTLogBackdoorPrintf("VBoxSF: RTR0Init failed: %Rrc\n", rc);
}
return KERN_FAILURE;
}
/**
* Stop the kernel module.
*/
static kern_return_t vboxSfDwnModuleUnload(struct kmod_info *pKModInfo, void *pvData)
{
RT_NOREF(pKModInfo, pvData);
#ifdef DEBUG
printf("vboxSfDwnModuleUnload\n");
RTLogBackdoorPrintf("vboxSfDwnModuleUnload\n");
#endif
/*
* Are we busy? If so fail. Otherwise try deregister the file system.
*/
if (g_cVBoxSfMounts > 0)
{
LogRel(("VBoxSF: Refusing to unload with %u active mounts\n", g_cVBoxSfMounts));
return KERN_NO_ACCESS;
}
if (g_pVBoxSfVfsTableEntry)
{
int rc = vfs_fsremove(g_pVBoxSfVfsTableEntry);
if (rc != 0)
{
LogRel(("VBoxSF: vfs_fsremove failed: %d\n", rc));
return KERN_NO_ACCESS;
}
}
/*
* Disconnect and terminate libraries we're using.
*/
if (g_SfClientDarwin.handle != NULL)
{
VbglR0SfDisconnect(&g_SfClientDarwin);
g_SfClientDarwin.handle = NULL;
}
if (g_pVBoxGuest)
{
g_pVBoxGuest->release();
g_pVBoxGuest = NULL;
}
VbglR0SfTerm();
RTR0Term();
return KERN_SUCCESS;
}
|
