VBoxSF-VfsOps.cpp

Last change on this file was 98103, checked in by vboxsync, 20 months ago
Copyright year updates by scm.
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1	/* $Id: VBoxSF-VfsOps.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2	/** @file
3	* VBoxFS - Darwin Shared Folders, Virtual File System Operations.
4	*/
5
6	/*
7	* Copyright (C) 2013-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/*********************************************************************************************************************************
30	* Header Files *
31	*********************************************************************************************************************************/
32	#define LOG_GROUP LOG_GROUP_SHARED_FOLDERS
33	#include "VBoxSFInternal.h"
34
35	#include <iprt/assert.h>
36	#include <iprt/asm.h>
37	#include <iprt/mem.h>
38	#include <iprt/string.h>
39	#include <VBox/log.h>
40
41
42
43	/**
44	* vfsops::vfs_getattr implementation.
45	*
46	* @returns 0 on success or errno.h value on failure.
47	* @param pMount The mount data structure.
48	* @param pFsAttr Input & output structure.
49	* @param pContext Unused kAuth parameter.
50	*/
51	static int vboxSfDwnVfsGetAttr(mount_t pMount, struct vfs_attr *pFsAttr, vfs_context_t pContext)
52	{
53	PVBOXSFMNTDATA pThis = (PVBOXSFMNTDATA)vfs_fsprivate(pMount);
54	AssertReturn(pThis, EBADMSG);
55	LogFlow(("vboxSfDwnVfsGetAttr: %s\n", pThis->MntInfo.szFolder));
56	RT_NOREF(pContext);
57
58	/*
59	* Get the file system stats from the host.
60	*/
61	int rc;
62	struct MyEmbReq
63	{
64	VBGLIOCIDCHGCMFASTCALL Hdr;
65	VMMDevHGCMCall Call;
66	VBoxSFParmInformation Parms;
67	SHFLVOLINFO VolInfo;
68	} pReq = (struct MyEmbReq )VbglR0PhysHeapAlloc(sizeof(*pReq));
69	if (pReq)
70	{
71	RT_ZERO(pReq->VolInfo);
72
73	VBGLIOCIDCHGCMFASTCALL_INIT(&pReq->Hdr, VbglR0PhysHeapGetPhysAddr(pReq), &pReq->Call, g_SfClientDarwin.idClient,
74	SHFL_FN_INFORMATION, SHFL_CPARMS_INFORMATION, sizeof(*pReq));
75	pReq->Parms.id32Root.type = VMMDevHGCMParmType_32bit;
76	pReq->Parms.id32Root.u.value32 = pThis->hHostFolder.root;
77	pReq->Parms.u64Handle.type = VMMDevHGCMParmType_64bit;
78	pReq->Parms.u64Handle.u.value64 = 0;
79	pReq->Parms.f32Flags.type = VMMDevHGCMParmType_32bit;
80	pReq->Parms.f32Flags.u.value32 = SHFL_INFO_VOLUME \| SHFL_INFO_GET;
81	pReq->Parms.cb32.type = VMMDevHGCMParmType_32bit;
82	pReq->Parms.cb32.u.value32 = sizeof(pReq->VolInfo);
83	pReq->Parms.pInfo.type = VMMDevHGCMParmType_Embedded;
84	pReq->Parms.pInfo.u.Embedded.cbData = sizeof(pReq->VolInfo);
85	pReq->Parms.pInfo.u.Embedded.offData = RT_UOFFSETOF(struct MyEmbReq, VolInfo) - sizeof(VBGLIOCIDCHGCMFASTCALL);
86	pReq->Parms.pInfo.u.Embedded.fFlags = VBOX_HGCM_F_PARM_DIRECTION_FROM_HOST;
87
88	int vrc = VbglR0HGCMFastCall(g_SfClientDarwin.handle, &pReq->Hdr, sizeof(*pReq));
89	if (RT_SUCCESS(vrc))
90	vrc = pReq->Call.header.result;
91	if (RT_SUCCESS(vrc))
92	{
93	/*
94	* Fill in stuff.
95	*/
96	/* Copy over the results we got from the host. */
97	uint32_t cbUnit = pReq->VolInfo.ulBytesPerSector * pReq->VolInfo.ulBytesPerAllocationUnit;
98	VFSATTR_RETURN(pFsAttr, f_bsize, cbUnit);
99	VFSATTR_RETURN(pFsAttr, f_iosize, _64K); /** @todo what's a good block size... */
100	VFSATTR_RETURN(pFsAttr, f_blocks, (uint64_t)pReq->VolInfo.ullTotalAllocationBytes / cbUnit);
101	VFSATTR_RETURN(pFsAttr, f_bavail, (uint64_t)pReq->VolInfo.ullAvailableAllocationBytes / cbUnit);
102	VFSATTR_RETURN(pFsAttr, f_bfree, (uint64_t)pReq->VolInfo.ullAvailableAllocationBytes / cbUnit);
103	VFSATTR_RETURN(pFsAttr, f_bused,
104	((uint64_t)pReq->VolInfo.ullTotalAllocationBytes - (uint64_t)pReq->VolInfo.ullAvailableAllocationBytes) / cbUnit);
105	fsid_t const fsid = { { vfs_statfs(pMount)->f_fsid.val[0], vfs_typenum(pMount) } };
106	VFSATTR_RETURN(pFsAttr, f_fsid, fsid);
107
108	/* f_owner is handled by caller. */
109	/* f_signature is handled by caller. */
110
111	struct timespec TmpTv = { 1084190406, 0 };
112	VFSATTR_RETURN(pFsAttr, f_create_time, TmpTv);
113
114	/*
115	* Unsupported bits.
116	*/
117	/* Dummies for some values we don't support. */
118	VFSATTR_RETURN(pFsAttr, f_objcount, 0);
119	VFSATTR_RETURN(pFsAttr, f_filecount, 0);
120	VFSATTR_RETURN(pFsAttr, f_dircount, 0);
121	VFSATTR_RETURN(pFsAttr, f_maxobjcount, UINT32_MAX);
122	VFSATTR_RETURN(pFsAttr, f_files, UINT32_MAX);
123	VFSATTR_RETURN(pFsAttr, f_ffree, UINT32_MAX);
124	VFSATTR_RETURN(pFsAttr, f_fssubtype, 0);
125	VFSATTR_RETURN(pFsAttr, f_carbon_fsid, 0);
126
127	/* Totally not supported: */
128	VFSATTR_CLEAR_ACTIVE(pFsAttr, f_modify_time);
129	VFSATTR_CLEAR_ACTIVE(pFsAttr, f_access_time);
130	VFSATTR_CLEAR_ACTIVE(pFsAttr, f_backup_time);
131
132	/*
133	* Annoying capability stuff.
134	* The 'valid' bits are only supposed to be set when we know for sure.
135	*/
136	if (VFSATTR_IS_ACTIVE(pFsAttr, f_capabilities))
137	{
138	vol_capabilities_attr_t *pCaps = &pFsAttr->f_capabilities;
139
140	pCaps->valid[VOL_CAPABILITIES_FORMAT] = VOL_CAP_FMT_PERSISTENTOBJECTIDS
141	\| VOL_CAP_FMT_SYMBOLICLINKS
142	\| VOL_CAP_FMT_HARDLINKS
143	\| VOL_CAP_FMT_JOURNAL
144	\| VOL_CAP_FMT_JOURNAL_ACTIVE
145	\| VOL_CAP_FMT_NO_ROOT_TIMES
146	\| VOL_CAP_FMT_SPARSE_FILES
147	\| VOL_CAP_FMT_ZERO_RUNS
148	\| VOL_CAP_FMT_CASE_SENSITIVE
149	\| VOL_CAP_FMT_CASE_PRESERVING
150	\| VOL_CAP_FMT_FAST_STATFS
151	\| VOL_CAP_FMT_2TB_FILESIZE
152	\| VOL_CAP_FMT_OPENDENYMODES
153	\| VOL_CAP_FMT_HIDDEN_FILES
154	\| VOL_CAP_FMT_PATH_FROM_ID
155	\| VOL_CAP_FMT_NO_VOLUME_SIZES
156	\| VOL_CAP_FMT_DECMPFS_COMPRESSION
157	\| VOL_CAP_FMT_64BIT_OBJECT_IDS;
158	pCaps->capabilities[VOL_CAPABILITIES_FORMAT] = VOL_CAP_FMT_2TB_FILESIZE
159	/// @todo \| VOL_CAP_FMT_SYMBOLICLINKS - later
160	/// @todo \| VOL_CAP_FMT_SPARSE_FILES - probably, needs testing.
161	/\| VOL_CAP_FMT_CASE_SENSITIVE - case-insensitive /
162	\| VOL_CAP_FMT_CASE_PRESERVING
163	/// @todo \| VOL_CAP_FMT_HIDDEN_FILES - if windows host.
164	/// @todo \| VOL_CAP_FMT_OPENDENYMODES - if windows host.
165	;
166	pCaps->valid[VOL_CAPABILITIES_INTERFACES] = VOL_CAP_INT_SEARCHFS
167	\| VOL_CAP_INT_ATTRLIST
168	\| VOL_CAP_INT_NFSEXPORT
169	\| VOL_CAP_INT_READDIRATTR
170	\| VOL_CAP_INT_EXCHANGEDATA
171	\| VOL_CAP_INT_COPYFILE
172	\| VOL_CAP_INT_ALLOCATE
173	\| VOL_CAP_INT_VOL_RENAME
174	\| VOL_CAP_INT_ADVLOCK
175	\| VOL_CAP_INT_FLOCK
176	\| VOL_CAP_INT_EXTENDED_SECURITY
177	\| VOL_CAP_INT_USERACCESS
178	\| VOL_CAP_INT_MANLOCK
179	\| VOL_CAP_INT_NAMEDSTREAMS
180	\| VOL_CAP_INT_EXTENDED_ATTR;
181	pCaps->capabilities[VOL_CAPABILITIES_INTERFACES] = 0
182	/// @todo \| VOL_CAP_INT_SEARCHFS
183	/// @todo \| VOL_CAP_INT_COPYFILE
184	/// @todo \| VOL_CAP_INT_READDIRATTR
185	;
186
187	pCaps->valid[VOL_CAPABILITIES_RESERVED1] = 0;
188	pCaps->capabilities[VOL_CAPABILITIES_RESERVED1] = 0;
189
190	pCaps->valid[VOL_CAPABILITIES_RESERVED2] = 0;
191	pCaps->capabilities[VOL_CAPABILITIES_RESERVED2] = 0;
192
193	VFSATTR_SET_SUPPORTED(pFsAttr, f_capabilities);
194	}
195
196
197	/*
198	* Annoying attribute stuff.
199	* The 'valid' bits are only supposed to be set when we know for sure.
200	*/
201	if (VFSATTR_IS_ACTIVE(pFsAttr, f_attributes))
202	{
203	vol_attributes_attr_t *pAt = &pFsAttr->f_attributes;
204
205	pAt->validattr.commonattr = ATTR_CMN_NAME
206	\| ATTR_CMN_DEVID
207	\| ATTR_CMN_FSID
208	\| ATTR_CMN_OBJTYPE
209	\| ATTR_CMN_OBJTAG
210	\| ATTR_CMN_OBJID
211	\| ATTR_CMN_OBJPERMANENTID
212	\| ATTR_CMN_PAROBJID
213	\| ATTR_CMN_SCRIPT
214	\| ATTR_CMN_CRTIME
215	\| ATTR_CMN_MODTIME
216	\| ATTR_CMN_CHGTIME
217	\| ATTR_CMN_ACCTIME
218	\| ATTR_CMN_BKUPTIME
219	\| ATTR_CMN_FNDRINFO
220	\| ATTR_CMN_OWNERID
221	\| ATTR_CMN_GRPID
222	\| ATTR_CMN_ACCESSMASK
223	\| ATTR_CMN_FLAGS
224	\| ATTR_CMN_USERACCESS
225	\| ATTR_CMN_EXTENDED_SECURITY
226	\| ATTR_CMN_UUID
227	\| ATTR_CMN_GRPUUID
228	\| ATTR_CMN_FILEID
229	\| ATTR_CMN_PARENTID
230	\| ATTR_CMN_FULLPATH
231	\| ATTR_CMN_ADDEDTIME;
232	pAt->nativeattr.commonattr = ATTR_CMN_NAME
233	\| ATTR_CMN_DEVID
234	\| ATTR_CMN_FSID
235	\| ATTR_CMN_OBJTYPE
236	\| ATTR_CMN_OBJTAG
237	\| ATTR_CMN_OBJID
238	//\| ATTR_CMN_OBJPERMANENTID
239	\| ATTR_CMN_PAROBJID
240	//\| ATTR_CMN_SCRIPT
241	\| ATTR_CMN_CRTIME
242	\| ATTR_CMN_MODTIME
243	\| ATTR_CMN_CHGTIME
244	\| ATTR_CMN_ACCTIME
245	//\| ATTR_CMN_BKUPTIME
246	//\| ATTR_CMN_FNDRINFO
247	//\| ATTR_CMN_OWNERID
248	//\| ATTR_CMN_GRPID
249	\| ATTR_CMN_ACCESSMASK
250	//\| ATTR_CMN_FLAGS
251	//\| ATTR_CMN_USERACCESS
252	//\| ATTR_CMN_EXTENDED_SECURITY
253	//\| ATTR_CMN_UUID
254	//\| ATTR_CMN_GRPUUID
255	\| ATTR_CMN_FILEID
256	\| ATTR_CMN_PARENTID
257	\| ATTR_CMN_FULLPATH
258	//\| ATTR_CMN_ADDEDTIME
259	;
260	pAt->validattr.volattr = ATTR_VOL_FSTYPE
261	\| ATTR_VOL_SIGNATURE
262	\| ATTR_VOL_SIZE
263	\| ATTR_VOL_SPACEFREE
264	\| ATTR_VOL_SPACEAVAIL
265	\| ATTR_VOL_MINALLOCATION
266	\| ATTR_VOL_ALLOCATIONCLUMP
267	\| ATTR_VOL_IOBLOCKSIZE
268	\| ATTR_VOL_OBJCOUNT
269	\| ATTR_VOL_FILECOUNT
270	\| ATTR_VOL_DIRCOUNT
271	\| ATTR_VOL_MAXOBJCOUNT
272	\| ATTR_VOL_MOUNTPOINT
273	\| ATTR_VOL_NAME
274	\| ATTR_VOL_MOUNTFLAGS
275	\| ATTR_VOL_MOUNTEDDEVICE
276	\| ATTR_VOL_ENCODINGSUSED
277	\| ATTR_VOL_CAPABILITIES
278	\| ATTR_VOL_UUID
279	\| ATTR_VOL_ATTRIBUTES
280	\| ATTR_VOL_INFO;
281	pAt->nativeattr.volattr = ATTR_VOL_FSTYPE
282	//\| ATTR_VOL_SIGNATURE
283	\| ATTR_VOL_SIZE
284	\| ATTR_VOL_SPACEFREE
285	\| ATTR_VOL_SPACEAVAIL
286	\| ATTR_VOL_MINALLOCATION
287	\| ATTR_VOL_ALLOCATIONCLUMP
288	\| ATTR_VOL_IOBLOCKSIZE
289	//\| ATTR_VOL_OBJCOUNT
290	//\| ATTR_VOL_FILECOUNT
291	//\| ATTR_VOL_DIRCOUNT
292	//\| ATTR_VOL_MAXOBJCOUNT
293	//\| ATTR_VOL_MOUNTPOINT - ??
294	\| ATTR_VOL_NAME
295	\| ATTR_VOL_MOUNTFLAGS
296	\| ATTR_VOL_MOUNTEDDEVICE
297	//\| ATTR_VOL_ENCODINGSUSED
298	\| ATTR_VOL_CAPABILITIES
299	//\| ATTR_VOL_UUID
300	\| ATTR_VOL_ATTRIBUTES
301	//\| ATTR_VOL_INFO
302	;
303	pAt->validattr.dirattr = ATTR_DIR_LINKCOUNT
304	\| ATTR_DIR_ENTRYCOUNT
305	\| ATTR_DIR_MOUNTSTATUS;
306	pAt->nativeattr.dirattr = 0 //ATTR_DIR_LINKCOUNT
307	\| ATTR_DIR_ENTRYCOUNT
308	\| ATTR_DIR_MOUNTSTATUS
309	;
310	pAt->validattr.fileattr = ATTR_FILE_LINKCOUNT
311	\| ATTR_FILE_TOTALSIZE
312	\| ATTR_FILE_ALLOCSIZE
313	\| ATTR_FILE_IOBLOCKSIZE
314	\| ATTR_FILE_DEVTYPE
315	\| ATTR_FILE_FORKCOUNT
316	\| ATTR_FILE_FORKLIST
317	\| ATTR_FILE_DATALENGTH
318	\| ATTR_FILE_DATAALLOCSIZE
319	\| ATTR_FILE_RSRCLENGTH
320	\| ATTR_FILE_RSRCALLOCSIZE;
321	pAt->nativeattr.fileattr = 0
322	//\|ATTR_FILE_LINKCOUNT
323	\| ATTR_FILE_TOTALSIZE
324	\| ATTR_FILE_ALLOCSIZE
325	//\| ATTR_FILE_IOBLOCKSIZE
326	\| ATTR_FILE_DEVTYPE
327	//\| ATTR_FILE_FORKCOUNT
328	//\| ATTR_FILE_FORKLIST
329	\| ATTR_FILE_DATALENGTH
330	\| ATTR_FILE_DATAALLOCSIZE
331	\| ATTR_FILE_RSRCLENGTH
332	\| ATTR_FILE_RSRCALLOCSIZE
333	;
334	pAt->validattr.forkattr = ATTR_FORK_TOTALSIZE
335	\| ATTR_FORK_ALLOCSIZE;
336	pAt->nativeattr.forkattr = 0
337	//\| ATTR_FORK_TOTALSIZE
338	//\| ATTR_FORK_ALLOCSIZE
339	;
340	VFSATTR_SET_SUPPORTED(pFsAttr, f_attributes);
341	}
342
343	if (VFSATTR_IS_ACTIVE(pFsAttr, f_vol_name))
344	{
345	RTStrCopy(pFsAttr->f_vol_name, MAXPATHLEN, pThis->MntInfo.szFolder);
346	VFSATTR_SET_SUPPORTED(pFsAttr, f_vol_name);
347	}
348
349	rc = 0;
350	}
351	else
352	{
353	Log(("vboxSfOs2QueryFileInfo: VbglR0SfFsInfo failed: %Rrc\n", vrc));
354	rc = RTErrConvertToErrno(vrc);
355	}
356
357	VbglR0PhysHeapFree(pReq);
358	}
359	else
360	rc = ENOMEM;
361	return rc;
362	}
363
364
365	/**
366	* vfsops::vfs_root implementation.
367	*
368	* @returns 0 on success or errno.h value on failure.
369	* @param pMount The mount data structure.
370	* @param ppVnode Where to return the referenced root node on success.
371	* @param pContext Unused kAuth parameter.
372	*/
373	static int vboxSfDwnVfsRoot(mount_t pMount, vnode_t *ppVnode, vfs_context_t pContext)
374	{
375	PVBOXSFMNTDATA pThis = (PVBOXSFMNTDATA)vfs_fsprivate(pMount);
376	AssertReturn(pThis, EBADMSG);
377	LogFlow(("vboxSfDwnVfsRoot: pThis=%p:{%s}\n", pThis, pThis->MntInfo.szFolder));
378	RT_NOREF(pContext);
379
380	/*
381	* We shouldn't be callable during unmount, should we?
382	*/
383	AssertReturn(vfs_isunmount(pMount), EBUSY);
384
385	/*
386	* There should always be a root node around.
387	*/
388	if (pThis->pVnRoot)
389	{
390	int rc = vnode_get(pThis->pVnRoot);
391	if (rc == 0)
392	{
393	*ppVnode = pThis->pVnRoot;
394	LogFlow(("vboxSfDwnVfsRoot: return %p\n", *ppVnode));
395	return 0;
396	}
397	Log(("vboxSfDwnVfsRoot: vnode_get failed! %d\n", rc));
398	return rc;
399	}
400
401	LogRel(("vboxSfDwnVfsRoot: pVnRoot is NULL!\n"));
402	return EILSEQ;
403	}
404
405
406	/**
407	* vfsops::vfs_umount implementation.
408	*
409	* @returns 0 on success or errno.h value on failure.
410	* @param pMount The mount data.
411	* @param fFlags Unmount flags.
412	* @param pContext kAuth context which we don't care much about.
413	*
414	*/
415	static int vboxSfDwnVfsUnmount(mount_t pMount, int fFlags, vfs_context_t pContext)
416	{
417	PVBOXSFMNTDATA pThis = (PVBOXSFMNTDATA)vfs_fsprivate(pMount);
418	AssertReturn(pThis, 0);
419	LogFlowFunc(("pThis=%p:{%s} fFlags=%#x\n", pThis, pThis->MntInfo.szFolder, fFlags));
420	RT_NOREF(pContext);
421
422	/*
423	* Flush vnodes.
424	*/
425	int rc = vflush(pMount, pThis->pVnRoot, fFlags & MNT_FORCE ? FORCECLOSE : 0);
426	if (rc == 0)
427	{
428	/*
429	* Is the file system still busy?
430	*
431	* Until we find a way of killing any active host calls, we cannot properly
432	* respect the MNT_FORCE flag here. So, MNT_FORCE is ignored here.
433	*/
434	if ( !pThis->pVnRoot
435	\|\| !vnode_isinuse(pThis->pVnRoot, 1))
436	{
437	/*
438	* Release our root vnode reference and do another flush.
439	*/
440	if (pThis->pVnRoot)
441	{
442	vnode_put(pThis->pVnRoot);
443	pThis->pVnRoot = NULL;
444	}
445	vflush(pMount, NULLVP, FORCECLOSE);
446
447	/*
448	* Unmap the shared folder and destroy our mount info structure.
449	*/
450	vfs_setfsprivate(pMount, NULL);
451
452	rc = VbglR0SfUnmapFolder(&g_SfClientDarwin, &pThis->hHostFolder);
453	AssertRC(rc);
454
455	RT_ZERO(*pThis);
456	RTMemFree(pThis);
457
458	vfs_clearflags(pMount, MNT_LOCAL); /* ?? */
459	rc = 0;
460
461	g_cVBoxSfMounts--;
462	}
463	else
464	{
465	Log(("VBoxSF: umount failed: file system busy! (%s)\n", pThis->MntInfo.szFolder));
466	rc = EBUSY;
467	}
468	}
469	return rc;
470	}
471
472
473	/**
474	* vfsops::vfs_start implementation.
475	*/
476	static int vboxSfDwnVfsStart(mount_t pMount, int fFlags, vfs_context_t pContext)
477	{
478	RT_NOREF(pMount, fFlags, pContext);
479	return 0;
480	}
481
482
483	/**
484	* vfsops::vfs_mount implementation.
485	*
486	* @returns 0 on success or errno.h value on failure.
487	* @param pMount The mount data structure.
488	* @param pDevVp The device to mount. Not used by us.
489	* @param pUserData User space address of parameters supplied to mount().
490	* We expect a VBOXSFDRWNMOUNTINFO structure.
491	* @param pContext kAuth context needed in order to authentificate mount
492	* operation.
493	*/
494	static int vboxSfDwnVfsMount(mount_t pMount, vnode_t pDevVp, user_addr_t pUserData, vfs_context_t pContext)
495	{
496	RT_NOREF(pDevVp, pContext);
497
498	/*
499	* We don't support mount updating.
500	*/
501	if (vfs_isupdate(pMount))
502	{
503	LogRel(("VBoxSF: mount: MNT_UPDATE is not supported.\n"));
504	return ENOTSUP;
505	}
506	if (pUserData == USER_ADDR_NULL)
507	{
508	LogRel(("VBoxSF: mount: pUserData is NULL.\n"));
509	return EINVAL;
510	}
511	struct vfsstatfs *pFsStats = vfs_statfs(pMount);
512	AssertReturn(pFsStats, EINVAL);
513
514	/*
515	* Get the mount information from userland.
516	*/
517	PVBOXSFMNTDATA pThis = (PVBOXSFMNTDATA)RTMemAllocZ(sizeof(*pThis));
518	if (!pThis)
519	return ENOMEM;
520	pThis->uidMounter = pFsStats->f_owner;
521
522	int rc = RTR0MemUserCopyFrom(&pThis->MntInfo, (RTR3PTR)pUserData, sizeof(pThis->MntInfo));
523	if (RT_FAILURE(rc))
524	{
525	LogRel(("VBoxSF: mount: Failed to copy in mount user data: %Rrc\n", rc));
526	rc = EFAULT;
527	}
528	else if (pThis->MntInfo.u32Magic != VBOXSFDRWNMOUNTINFO_MAGIC)
529	{
530	LogRel(("VBoxSF: mount: Invalid user data magic (%#x)\n", pThis->MntInfo.u32Magic));
531	rc = EINVAL;
532	}
533	else if ( (rc = RTStrValidateEncodingEx(pThis->MntInfo.szFolder, sizeof(pThis->MntInfo.szFolder),
534	RTSTR_VALIDATE_ENCODING_ZERO_TERMINATED)) != VINF_SUCCESS
535	\|\| pThis->MntInfo.szFolder[0] == '\0')
536	{
537	LogRel(("VBoxSF: mount: Invalid or empty share name!\n"));
538	rc = EINVAL;
539	}
540	else
541	{
542	/*
543	* Try map the shared folder.
544	*/
545	if (vboxSfDwnConnect())
546	{
547	PSHFLSTRING pName = ShflStringDupUtf8(pThis->MntInfo.szFolder);
548	if (pName)
549	{
550	rc = VbglR0SfMapFolder(&g_SfClientDarwin, pName, &pThis->hHostFolder);
551	RTMemFree(pName);
552	if (RT_SUCCESS(rc))
553	{
554
555	/*
556	* Create a root node, that avoid races later.
557	*/
558	pThis->pVnRoot = vboxSfDwnVnAlloc(pMount, VDIR, NULL /pParent/, 0);
559	if (pThis->pVnRoot)
560	{
561	/*
562	* Fill file system stats with dummy data.
563	*/
564	pFsStats->f_bsize = 512;
565	pFsStats->f_iosize = _64K;
566	pFsStats->f_blocks = _1M;
567	pFsStats->f_bavail = _1M / 4 * 3;
568	pFsStats->f_bused = _1M / 4;
569	pFsStats->f_files = 1024;
570	pFsStats->f_ffree = _64K;
571	vfs_getnewfsid(pMount); /* f_fsid */
572	/* pFsStats->f_fowner - don't touch */
573	/* pFsStats->f_fstypename - don't touch */
574	/* pFsStats->f_mntonname - don't touch */
575	RTStrCopy(pFsStats->f_mntfromname, sizeof(pFsStats->f_mntfromname), pThis->MntInfo.szFolder);
576	/* pFsStats->f_fssubtype - don't touch? */
577	/* pFsStats->f_reserved[0] - don't touch? */
578	/* pFsStats->f_reserved[1] - don't touch? */
579
580	/*
581	* We're good. Set private data and flags.
582	*/
583	vfs_setfsprivate(pMount, pThis);
584	vfs_setflags(pMount, MNT_SYNCHRONOUS \| MNT_NOSUID \| MNT_NODEV);
585	/** @todo Consider flags like MNT_NOEXEC ? */
586
587	/// @todo vfs_setauthopaque(pMount)?
588	/// @todo vfs_clearauthopaqueaccess(pMount)?
589	/// @todo vfs_clearextendedsecurity(pMount)?
590
591	LogRel(("VBoxSF: mount: Successfully mounted '%s' (uidMounter=%u).\n",
592	pThis->MntInfo.szFolder, pThis->uidMounter));
593	return 0;
594	}
595
596	LogRel(("VBoxSF: mount: Failed to allocate root node!\n"));
597	rc = ENOMEM;
598	}
599	else
600	{
601	LogRel(("VBoxSF: mount: VbglR0SfMapFolder failed on '%s': %Rrc\n", pThis->MntInfo.szFolder, rc));
602	rc = ENOENT;
603	}
604	}
605	else
606	rc = ENOMEM;
607	}
608	else
609	{
610	LogRel(("VBoxSF: mount: Not connected to shared folders service!\n"));
611	rc = ENOTCONN;
612	}
613	}
614	RTMemFree(pThis);
615	return rc;
616	}
617
618
619	/**
620	* VFS operations
621	*/
622	struct vfsops g_VBoxSfVfsOps =
623	{
624	vboxSfDwnVfsMount,
625	vboxSfDwnVfsStart,
626	vboxSfDwnVfsUnmount,
627	vboxSfDwnVfsRoot,
628	NULL, /* Skipped: vfs_quotactl */
629	vboxSfDwnVfsGetAttr,
630	NULL, /* Skipped: vfs_sync */
631	NULL, /* Skipped: vfs_vget */
632	NULL, /* Skipped: vfs_fhtovp */
633	NULL, /* Skipped: vfs_vptofh */
634	NULL, /* Skipped: vfs_init */
635	NULL, /* Skipped: vfs_sysctl */
636	NULL, /* Skipped: vfs_setattr */
637	/* Reserved */
638	{ NULL, NULL, NULL, NULL, NULL, NULL, NULL, },
639	};

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source: vbox/trunk/src/VBox/Additions/darwin/VBoxSF/VBoxSF-VfsOps.cpp

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