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1 /*
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * The contents of this file constitute Original Code as defined in and
7 * are subject to the Apple Public Source License Version 1.1 (the
8 * "License"). You may not use this file except in compliance with the
9 * License. Please obtain a copy of the License at
10 * http://www.apple.com/publicsource and read it before using this file.
11 *
12 * This Original Code and all software distributed under the License are
13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17 * License for the specific language governing rights and limitations
18 * under the License.
19 *
20 * @APPLE_LICENSE_HEADER_END@
21 */
22 /*
23 File: VolumeRequests.c
24
25 Contains: MountVolume and related utility routines for HFS & HFS Plus
26
27 Version: HFS Plus 1.0
28
29 Written by: Deric Horn
30
31 Copyright: © 1996-1998 by Apple Computer, Inc., all rights reserved.
32
33 File Ownership:
34
35 DRI: Deric Horn
36
37 Other Contacts: Mark Day, Don Brady
38
39 Technology: File Systems
40
41 Writers:
42
43 (JL) Jim Luther
44 (msd) Mark Day
45 (DSH) Deric Horn
46 (djb) Don Brady
47
48 Change History (most recent first):
49 <MacOSX> 7/28/98 djb GetDiskBlocks is now implemented in MacOSStubs.c (radar #2258148).
50 <MacOSX> 4/3/98 djb Conditionally remove FSVars reference from GetVolumeNameFromCatalog.
51 <MacOSX> 3/31/98 djb Sync up with final HFSVolumes.h header file.
52 <CS47> 1/29/98 DSH TrashAllFSCaches is responsible for trashing all file system and
53 disk caches. Called from FlushVol when the HFS bit is set.
54 <CS46> 12/12/97 DSH 2003877, when vcbAllocPtr was copied to nextAllocation it was
55 getting sign extended.
56 <CS45> 11/26/97 DSH 2003459, fcbs was not being initialized if volume was offline
57 and we are executing an unconditional unmount.
58 <CS44> 11/24/97 DSH 2005507, FlushVolumeControlBlock() keeps MDB drCrDate in sync
59 with VolumeHeader createDate.
60 <CS43> 11/11/97 DSH 1685873, RemountWrappedVolumes was only remounting the first
61 HFS+ volume in the queue, causing HFS wrappers to be mounted if
62 multiple volumes had been mounted before InitHFSPlus.
63 <CS42> 11/4/97 DSH Clear FCB when getting a new one.
64 <CS41> 11/3/97 JL #2001483 - Removed unneeded parameters from MountVolume,
65 MountHFSVolume, MountHFSPlusVolume, GetVolumeInformation,
66 GetXVolumeInformation and AddVCB (and added local variables as
67 needed). Return WDCBRecPtr from UnMountVolume. Set wdcb
68 parameter to NULL in GetXVolumeInformation if working directory
69 was not specified.
70 <CS40> 10/31/97 DSH Added consistencyStatus parameter to MountCheck
71 <CS39> 10/23/97 msd Bug 1685113. The VolumeHeader's createDate should be in local
72 time (not GMT) and identical to the MDB's drCrDate (and VCB's
73 vcbCrDate). When checking for a remount of an offline HFS Plus
74 volume, compare write counts instead of mod dates (which could
75 be fooled by the user changing time zones). Force MountCheck to
76 run if the volume was last mounted by Bride 1.0b2 or earlier.
77 <CS38> 10/17/97 msd Conditionalize DebugStrs.
78 <CS37> 10/13/97 djb Update volumeNameEncodingHint when updating the volume name.
79 <CS36> 10/10/97 msd Bug 1683571. The dates in the volume header are in GMT, so be
80 sure to convert them when mounting a volume or flushing the
81 volume header.
82 <CS35> 10/2/97 DSH In UnmountVolume() check that the drive is on line before
83 determining if wrapper volume needs to be renamed causing IO.
84 <CS34> 10/1/97 DSH Run on disk version of MountCheck instead of ROM version for
85 boot volumes1682475.
86 <CS33> 10/1/97 djb Add calls to InvalidateCatalogCache (part of radar #1678833).
87 <CS32> 9/26/97 DSH Removed debugging code: support for 'W' key wrapper mounting.
88 <CS31> 9/17/97 DSH hfsPlusIOPosOffset was uninitialized for Wrapperless volumes.
89 <CS30> 9/5/97 djb In MountVol initialize Catalog cache before calling Catalog!
90 <CS29> 9/4/97 msd PropertyCloseVolume renamed to AttributesCloseVolume. Remove
91 call to AttributesOpenVolume (it no longer exists).
92 <CS28> 9/2/97 DSH VolumeHeader is now 3rd sector in partition, altVH is 2nd to
93 last cor compatability. Initial support for wrapperless
94 volumes.
95 <CS27> 8/26/97 djb Only call CountRootFiles during MountVol.
96 <CS26> 8/20/97 msd If the HFS Plus volume version doesn't match, mount the wrapper
97 instead.
98 <CS25> 8/19/97 djb Add error handling to RenameWrapperVolume.
99 <CS24> 8/15/97 msd Bug 1673999. In MakeVCBsExtendedVCBs, copy old VCB's vcbAllocPtr
100 to new VCB's nextAllocation field.
101 <CS23> 8/12/97 djb Fixed GetXVolInfo to only use extended vcb fields for local
102 volumes (radar# 1673177)
103 <CS22> 8/11/97 DSH vcbNmAlBlks is now taken from the embededExtent.blockCount
104 (1669121).
105 <CS21> 8/11/97 djb Return actual count of files in root directory for HFS Plus
106 volumes (Radar #1669118). Added local CountRootFiles routine.
107 8/5/97 msd Make sure version field in VolumeHeader is exactly
108 kHFSPlusVersion. 8/1/97 djb GetXVolumeInformation now returns
109 extFSErr when FSID is nonzero (Radar #1649503).
110 <CS20> 7/25/97 DSH Init and Dispose of GenericMRUCache within ExtendedVCB.
111 <CS19> 7/16/97 DSH FilesInternal.x -> FileMgrInternal.x to avoid name collision
112 <CS18> 7/15/97 DSH Remount Wrapper volumes mounted before HFS+ initialization
113 (166729)
114 <CS17> 7/15/97 djb Remove ioXVersion checking in GetXVolInfo (radar #1666217).
115 <CS16> 7/8/97 DSH Loading PrecompiledHeaders from define passed in on C line
116 <CS15> 7/7/97 djb Add GetVolumeNameFromCatalog routine.
117 <CS14> 7/7/97 DSH GetNewVRefNum now get's a recycled vRefNum. Bug 1664445 in
118 Installer was cacheing the vRefNum while CheckDisk unmounts and
119 remounts disk.
120 <CS13> 6/30/97 DSH shadowing values obsoleteVCBXTRef, and obsoleteVCBCTRef when
121 HFS+ volume is mounted.
122 <CS12> 6/26/97 DSH GetVolInfo returns HFS signature for HFS+ volumes, GetXVolInfo
123 returns real signature.
124 <CS11> 6/24/97 DSH MakeVCBsExtendedVCBs was using wdcb->count as count not byte
125 count.
126 <CS10> 6/18/97 djb Set/get volume encodingsBitmap.
127 <CS9> 6/16/97 msd Include String.h and Disks.h.
128 <CS8> 6/12/97 djb Get in sync with HFS Plus format changes.
129 <CS7> 6/11/97 msd Make GetXVolumeInformation return true allocation block size. It
130 now checks the ioXVersion field.
131 <CS6> 5/28/97 msd When flushing the volume header, write out the allocation file's
132 clump size (from the FCB). When mounting an HFS Plus volume,
133 zero the entire FCB extent record, not just the first extent,
134 for the various volume control files.
135 <CS5> 5/19/97 djb Add calls to CreateVolumeCatalogCache,
136 DisposeVolumeCatalogCache.
137 <CS4> 5/9/97 djb Get in sync with new FilesInternal.i
138 <CS3> 5/8/97 DSH Only mount HFS+ volumes with version < 2.0 in the VolumeHeader.
139 Return wrgVolTypErr if too new.
140 <CS2> 5/2/97 djb Disable Manual Eject code since its buggy!
141 <CS1> 4/25/97 djb first checked in
142
143 <HFS32> 4/11/97 DSH MountHFSPlusVolume gets volume name from catalog, and
144 UnmountVolume shadows the name back to the wrapper partition.
145 <HFS31> 4/8/97 msd Once volume is mounted, call AttributesOpenVolume to allow a
146 buffer to be allocated.
147 <HFS30> 4/7/97 msd In FlushVolumeControlBlock, don't update the attributes BTree
148 fields in the Volume Header unless an attributes BTree was
149 already open.
150 <HFS29> 4/7/97 msd In SetupFCB, add case for attributes BTree. Add code to set up
151 the attributes BTree. Remove call to PropertyOpenVolume. In
152 FlushVolumeControlBlock, write out any changes to the attributes
153 BTree.
154 <HFS28> 4/4/97 djb Get in sync with volume format changes.
155 <HFS27> 3/31/97 djb Added catalogDataCache to VCB; Remove ClearMem routine.
156 <HFS26> 3/18/97 msd In MountHFSPlusVolume, the free blocks calculation can overflow,
157 setting vcbFreeBks to a too-small value.
158 <HFS25> 3/17/97 DSH Added some utility functions AddVCB, GetParallelFCBFromRefNum,
159 casting for SC, and made some functions extern for DFA.
160 <HFS24> 3/5/97 msd Add calls to Property Manager to open and close the volume. When
161 unmounting an HFS+ volume, the allocation (bitmap) file now gets
162 closed.
163 <HFS23> 2/19/97 djb Update to 16-bit HFS Plus signature.
164 <HFS22> 2/12/97 msd In GetXVolumeInformation, the result code could be
165 uninitialized.
166 <HFS21> 1/23/97 DSH UpdateAlternateVoumeControlBlock()
167 <HFS20> 1/15/97 djb Remove MountCheckStub. Add file names to fcbs for debugging.
168 <HFS19> 1/13/97 DSH Use ExtendedVCB nextAllocation instead of vcbAllocPtr through
169 all code.
170 <HFS18> 1/9/97 djb Get in sync with new VolumeHeader and Extended VCB.
171 <HFS17> 1/6/97 djb Changed API to ParallelFCBFromRefnum (pragma parameter was
172 broken).
173 <HFS16> 1/6/97 msd Set only the defined bits in the MDB drAtrb field (when copying
174 from VCB vcbAtrb field).
175 <HFS15> 1/6/97 DSH CloseFile requires VCB to be passed in.
176 <HFS14> 1/6/97 djb FlushVolumeControlBlock was writing to absolute block 0 instead
177 of to block zero of the embedded volume.
178 <HFS13> 12/20/96 msd A comparison was using "=" instead of "=="; might have caused
179 the wrong volume to be set as the default.
180 <HFS12> 12/19/96 DSH Setting up ExtendedVCBs
181 <HFS11> 12/19/96 djb Updated for new B-tree Manager interface.
182 <HFS10> 12/18/96 msd Change GetVCBRefNum so it can actually return a VCB pointer.
183 <HFS9> 12/12/96 djb Use new SPI for GetCatalogNode.
184 <HFS8> 12/12/96 msd Fix a bunch of errors (mostly type mismatch) when compiling with
185 Metrowerks.
186 <HFS7> 12/12/96 DSH adding some util functions
187 <HFS6> 12/10/96 msd Check PRAGMA_LOAD_SUPPORTED before loading precompiled headers.
188 <HFS5> 12/4/96 DSH Ported GetVolumeInformation & GetXVolumeInformation.
189 <3*> 11/20/96 DSH HFS Plus support to MountVolume
190 <HFS3> 11/20/96 DSH Added UnmountVol and related routines, also backed out <2>
191 because C_FXMKeyCmp is passed as a parameter from C but called
192 from Asm in BTOpen so we need a Case ON Asm entry point.
193 <HFS2> 11/20/96 msd Use CompareExtentKeys() instead of CFXMKeyCmp().
194 <HFS1> 11/19/96 DSH first checked in
195 <1> 11/19/96 DSH first checked in
196
197 */
198 #include <sys/param.h>
199 #include <sys/systm.h>
200 #include <sys/kernel.h>
201 #include <sys/vnode.h>
202 #include <sys/malloc.h>
203
204 #include "../../hfs.h"
205 #include "../../hfs_endian.h"
206
207 #include "../headers/FileMgrInternal.h"
208
209
210 OSErr ValidMasterDirectoryBlock( HFSMasterDirectoryBlock *mdb );
211
212 OSErr GetVolumeNameFromCatalog(ExtendedVCB *vcb);
213
214 // External routines
215
216 extern OSErr C_FlushMDB( ExtendedVCB *volume );
217
218
219 //\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b
220 // Routine: VolumeWritable Asm: CVFlgs
221 //
222 // Function: Check the volume's flags to see if modify requests are allowed.
223 //
224 //\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b
225 OSErr VolumeWritable( ExtendedVCB *vcb )
226 {
227 if ( !(vcb->vcbAtrb & 0x8000) ) // if the volume is not locked
228 {
229 if ( ! (*((Ptr)&(vcb->vcbAtrb) + 1) & kHFSVolumeHardwareLockMask) ) // if it's not write protected
230 return( noErr );
231 else
232 return( wPrErr );
233 }
234 else
235 {
236 return( vLckdErr );
237 }
238 }
239
240
241 //\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b
242 // Routine: ValidMasterDirectoryBlock
243 //
244 // Function: Run some sanity checks to make sure the MDB is valid
245 //
246 // Result: error
247 //\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b
248 OSErr ValidMasterDirectoryBlock( HFSMasterDirectoryBlock *mdb )
249 {
250 OSErr err;
251
252 if ( (SWAP_BE16 (mdb->drSigWord) == kHFSPlusSigWord) || (SWAP_BE16 (mdb->drSigWord) == kHFSSigWord) ) // if HFS or HFS Plus volume
253 {
254 if ( (SWAP_BE32 (mdb->drAlBlkSiz) != 0) && ((SWAP_BE32 (mdb->drAlBlkSiz) & 0x01FF) == 0) ) // non zero multiple of 512
255 err = noErr;
256 else
257 err = badMDBErr;
258 }
259 else
260 {
261 err = noMacDskErr;
262 }
263
264 return( err );
265 }
266
267
268 //\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b
269 // Routine: ValidVolumeHeader
270 //
271 // Function: Run some sanity checks to make sure the VolumeHeader is valid
272 //
273 // Result: error
274 //\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b
275 OSErr ValidVolumeHeader( HFSPlusVolumeHeader *volumeHeader )
276 {
277 OSErr err;
278
279 if ( SWAP_BE16 (volumeHeader->signature) == kHFSPlusSigWord && SWAP_BE16 (volumeHeader->version) == kHFSPlusVersion )
280 {
281 if ( (SWAP_BE32 (volumeHeader->blockSize) != 0) && ((SWAP_BE32 (volumeHeader->blockSize) & 0x01FF) == 0) ) // non zero multiple of 512
282 err = noErr;
283 else
284 err = badMDBErr; //\80\80 I want badVolumeHeaderErr in Errors.i
285 }
286 else
287 {
288 err = noMacDskErr;
289 }
290
291 return( err );
292 }
293
294
295 //_______________________________________________________________________
296 //
297 // Routine: FlushVolumeControlBlock
298 // Arguments: ExtendedVCB *vcb
299 // Output: OSErr err
300 //
301 // Function: Flush volume information to either the VolumeHeader of the Master Directory Block
302 //_______________________________________________________________________
303
304 OSErr FlushVolumeControlBlock( ExtendedVCB *vcb )
305 {
306 OSErr err;
307
308 if ( ! IsVCBDirty( vcb ) ) // if it's not dirty
309 return( noErr );
310
311 if ( vcb->vcbSigWord == kHFSPlusSigWord )
312 {
313 err = C_FlushMDB( vcb ); // Go flush the VCB info BEFORE close
314 }
315 else
316 {
317 // This routine doesn't really return an error!!!
318 // So for now, we will just return noErr
319 err = C_FlushMDB( vcb ); // Go flush the VCB info BEFORE close
320 return( noErr );
321 }
322
323 return( err );
324 }
325
326
327 //\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b\8b
328
329 OSErr GetVolumeNameFromCatalog( ExtendedVCB *vcb )
330 {
331 CatalogNodeData nodeData;
332 UInt32 hint;
333 OSErr err;
334
335 INIT_CATALOGDATA(&nodeData, 0);
336
337 err = GetCatalogNode( vcb, kHFSRootFolderID, NULL, kUndefinedStrLen, kNoHint, &nodeData, &hint );
338
339 if ( err == noErr )
340 {
341 BlockMoveData( nodeData.cnm_nameptr, vcb->vcbVN, min(255, nodeData.cnm_length));
342 vcb->volumeNameEncodingHint = nodeData.cnd_textEncoding;
343
344 /* HFS+ uses the root directory's create date since its in GMT */
345 if (vcb->vcbSigWord == kHFSPlusSigWord)
346 vcb->vcbCrDate = nodeData.cnd_createDate;
347 }
348
349 CLEAN_CATALOGDATA(&nodeData);
350
351 return err;
352 }
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