1 | /* |
2 | * Copyright (c) 1998-2011 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | #include <IOKit/IOBSD.h> |
29 | #include <IOKit/IOLib.h> |
30 | #include <IOKit/IOService.h> |
31 | #include <IOKit/IOCatalogue.h> |
32 | #include <IOKit/IODeviceTreeSupport.h> |
33 | #include <IOKit/IOKitKeys.h> |
34 | #include <IOKit/IOPlatformExpert.h> |
35 | #include <IOKit/IOUserClient.h> |
36 | |
37 | extern "C" { |
38 | |
39 | #include <pexpert/pexpert.h> |
40 | #include <kern/clock.h> |
41 | #include <mach/machine.h> |
42 | #include <uuid/uuid.h> |
43 | #include <sys/vnode_internal.h> |
44 | #include <sys/mount.h> |
45 | |
46 | // how long to wait for matching root device, secs |
47 | #if DEBUG |
48 | #define ROOTDEVICETIMEOUT 120 |
49 | #else |
50 | #define ROOTDEVICETIMEOUT 60 |
51 | #endif |
52 | |
53 | int panic_on_exception_triage = 0; |
54 | |
55 | extern dev_t mdevadd(int devid, uint64_t base, unsigned int size, int phys); |
56 | extern dev_t mdevlookup(int devid); |
57 | extern void mdevremoveall(void); |
58 | extern int mdevgetrange(int devid, uint64_t *base, uint64_t *size); |
59 | extern void di_root_ramfile(IORegistryEntry * entry); |
60 | |
61 | #if CONFIG_EMBEDDED |
62 | #define IOPOLLED_COREFILE (CONFIG_KDP_INTERACTIVE_DEBUGGING) |
63 | |
64 | #if defined(XNU_TARGET_OS_BRIDGE) |
65 | |
66 | #define kIOCoreDumpSize 150ULL*1024ULL*1024ULL |
67 | // leave free space on volume: |
68 | #define kIOCoreDumpFreeSize 150ULL*1024ULL*1024ULL |
69 | #define kIOCoreDumpPath "/private/var/internal/kernelcore" |
70 | |
71 | #else /* defined(XNU_TARGET_OS_BRIDGE) */ |
72 | #define kIOCoreDumpMinSize 350ULL*1024ULL*1024ULL |
73 | #define kIOCoreDumpLargeSize 500ULL*1024ULL*1024ULL |
74 | // leave free space on volume: |
75 | #define kIOCoreDumpFreeSize 350ULL*1024ULL*1024ULL |
76 | #define kIOCoreDumpPath "/private/var/vm/kernelcore" |
77 | |
78 | #endif /* defined(XNU_TARGET_OS_BRIDGE) */ |
79 | |
80 | #elif DEVELOPMENT /* CONFIG_EMBEDDED */ |
81 | #define IOPOLLED_COREFILE 1 |
82 | // no sizing |
83 | #define kIOCoreDumpSize 0ULL |
84 | #define kIOCoreDumpFreeSize 0ULL |
85 | #else /* CONFIG_EMBEDDED */ |
86 | #define IOPOLLED_COREFILE 0 |
87 | #endif /* CONFIG_EMBEDDED */ |
88 | |
89 | |
90 | #if IOPOLLED_COREFILE |
91 | static bool |
92 | NewKernelCoreMedia(void * target, void * refCon, |
93 | IOService * newService, |
94 | IONotifier * notifier); |
95 | #endif /* IOPOLLED_COREFILE */ |
96 | |
97 | #if CONFIG_KDP_INTERACTIVE_DEBUGGING |
98 | /* |
99 | * Touched by IOFindBSDRoot() if a RAMDisk is used for the root device. |
100 | */ |
101 | extern uint64_t kdp_core_ramdisk_addr; |
102 | extern uint64_t kdp_core_ramdisk_size; |
103 | #endif |
104 | |
105 | kern_return_t |
106 | IOKitBSDInit( void ) |
107 | { |
108 | IOService::publishResource("IOBSD" ); |
109 | |
110 | return( kIOReturnSuccess ); |
111 | } |
112 | |
113 | void |
114 | IOServicePublishResource( const char * property, boolean_t value ) |
115 | { |
116 | if ( value) |
117 | IOService::publishResource( property, kOSBooleanTrue ); |
118 | else |
119 | IOService::getResourceService()->removeProperty( property ); |
120 | } |
121 | |
122 | boolean_t |
123 | IOServiceWaitForMatchingResource( const char * property, uint64_t timeout ) |
124 | { |
125 | OSDictionary * dict = 0; |
126 | IOService * match = 0; |
127 | boolean_t found = false; |
128 | |
129 | do { |
130 | |
131 | dict = IOService::resourceMatching( property ); |
132 | if( !dict) |
133 | continue; |
134 | match = IOService::waitForMatchingService( dict, timeout ); |
135 | if ( match) |
136 | found = true; |
137 | |
138 | } while( false ); |
139 | |
140 | if( dict) |
141 | dict->release(); |
142 | if( match) |
143 | match->release(); |
144 | |
145 | return( found ); |
146 | } |
147 | |
148 | boolean_t |
149 | IOCatalogueMatchingDriversPresent( const char * property ) |
150 | { |
151 | OSDictionary * dict = 0; |
152 | OSOrderedSet * set = 0; |
153 | SInt32 generationCount = 0; |
154 | boolean_t found = false; |
155 | |
156 | do { |
157 | |
158 | dict = OSDictionary::withCapacity(1); |
159 | if( !dict) |
160 | continue; |
161 | dict->setObject( property, kOSBooleanTrue ); |
162 | set = gIOCatalogue->findDrivers( dict, &generationCount ); |
163 | if ( set && (set->getCount() > 0)) |
164 | found = true; |
165 | |
166 | } while( false ); |
167 | |
168 | if( dict) |
169 | dict->release(); |
170 | if( set) |
171 | set->release(); |
172 | |
173 | return( found ); |
174 | } |
175 | |
176 | OSDictionary * IOBSDNameMatching( const char * name ) |
177 | { |
178 | OSDictionary * dict; |
179 | const OSSymbol * str = 0; |
180 | |
181 | do { |
182 | |
183 | dict = IOService::serviceMatching( gIOServiceKey ); |
184 | if( !dict) |
185 | continue; |
186 | str = OSSymbol::withCString( name ); |
187 | if( !str) |
188 | continue; |
189 | dict->setObject( kIOBSDNameKey, (OSObject *) str ); |
190 | str->release(); |
191 | |
192 | return( dict ); |
193 | |
194 | } while( false ); |
195 | |
196 | if( dict) |
197 | dict->release(); |
198 | if( str) |
199 | str->release(); |
200 | |
201 | return( 0 ); |
202 | } |
203 | |
204 | OSDictionary * IOUUIDMatching( void ) |
205 | { |
206 | return IOService::resourceMatching( "boot-uuid-media" ); |
207 | } |
208 | |
209 | OSDictionary * IONetworkNamePrefixMatching( const char * prefix ) |
210 | { |
211 | OSDictionary * matching; |
212 | OSDictionary * propDict = 0; |
213 | const OSSymbol * str = 0; |
214 | char networkType[128]; |
215 | |
216 | do { |
217 | matching = IOService::serviceMatching( "IONetworkInterface" ); |
218 | if ( matching == 0 ) |
219 | continue; |
220 | |
221 | propDict = OSDictionary::withCapacity(1); |
222 | if ( propDict == 0 ) |
223 | continue; |
224 | |
225 | str = OSSymbol::withCString( prefix ); |
226 | if ( str == 0 ) |
227 | continue; |
228 | |
229 | propDict->setObject( "IOInterfaceNamePrefix" , (OSObject *) str ); |
230 | str->release(); |
231 | str = 0; |
232 | |
233 | // see if we're contrained to netroot off of specific network type |
234 | if(PE_parse_boot_argn( "network-type" , networkType, 128 )) |
235 | { |
236 | str = OSSymbol::withCString( networkType ); |
237 | if(str) |
238 | { |
239 | propDict->setObject( "IONetworkRootType" , str); |
240 | str->release(); |
241 | str = 0; |
242 | } |
243 | } |
244 | |
245 | if ( matching->setObject( gIOPropertyMatchKey, |
246 | (OSObject *) propDict ) != true ) |
247 | continue; |
248 | |
249 | propDict->release(); |
250 | propDict = 0; |
251 | |
252 | return( matching ); |
253 | |
254 | } while ( false ); |
255 | |
256 | if ( matching ) matching->release(); |
257 | if ( propDict ) propDict->release(); |
258 | if ( str ) str->release(); |
259 | |
260 | return( 0 ); |
261 | } |
262 | |
263 | static bool IORegisterNetworkInterface( IOService * netif ) |
264 | { |
265 | // A network interface is typically named and registered |
266 | // with BSD after receiving a request from a user space |
267 | // "namer". However, for cases when the system needs to |
268 | // root from the network, this registration task must be |
269 | // done inside the kernel and completed before the root |
270 | // device is handed to BSD. |
271 | |
272 | IOService * stack; |
273 | OSNumber * zero = 0; |
274 | OSString * path = 0; |
275 | OSDictionary * dict = 0; |
276 | char * pathBuf = 0; |
277 | int len; |
278 | enum { kMaxPathLen = 512 }; |
279 | |
280 | do { |
281 | stack = IOService::waitForService( |
282 | IOService::serviceMatching("IONetworkStack" ) ); |
283 | if ( stack == 0 ) break; |
284 | |
285 | dict = OSDictionary::withCapacity(3); |
286 | if ( dict == 0 ) break; |
287 | |
288 | zero = OSNumber::withNumber((UInt64) 0, 32); |
289 | if ( zero == 0 ) break; |
290 | |
291 | pathBuf = (char *) IOMalloc( kMaxPathLen ); |
292 | if ( pathBuf == 0 ) break; |
293 | |
294 | len = kMaxPathLen; |
295 | if ( netif->getPath( pathBuf, &len, gIOServicePlane ) |
296 | == false ) break; |
297 | |
298 | path = OSString::withCStringNoCopy( pathBuf ); |
299 | if ( path == 0 ) break; |
300 | |
301 | dict->setObject( "IOInterfaceUnit" , zero ); |
302 | dict->setObject( kIOPathMatchKey, path ); |
303 | |
304 | stack->setProperties( dict ); |
305 | } |
306 | while ( false ); |
307 | |
308 | if ( zero ) zero->release(); |
309 | if ( path ) path->release(); |
310 | if ( dict ) dict->release(); |
311 | if ( pathBuf ) IOFree(pathBuf, kMaxPathLen); |
312 | |
313 | return ( netif->getProperty( kIOBSDNameKey ) != 0 ); |
314 | } |
315 | |
316 | OSDictionary * IOOFPathMatching( const char * path, char * buf, int maxLen ) |
317 | { |
318 | OSDictionary * matching = NULL; |
319 | OSString * str; |
320 | char * comp; |
321 | int len; |
322 | |
323 | do { |
324 | |
325 | len = strlen( kIODeviceTreePlane ":" ); |
326 | maxLen -= len; |
327 | if( maxLen <= 0) |
328 | continue; |
329 | |
330 | strlcpy( buf, kIODeviceTreePlane ":" , len + 1 ); |
331 | comp = buf + len; |
332 | |
333 | len = strlen( path ); |
334 | maxLen -= len; |
335 | if( maxLen <= 0) |
336 | continue; |
337 | strlcpy( comp, path, len + 1 ); |
338 | |
339 | matching = OSDictionary::withCapacity( 1 ); |
340 | if( !matching) |
341 | continue; |
342 | |
343 | str = OSString::withCString( buf ); |
344 | if( !str) |
345 | continue; |
346 | matching->setObject( kIOPathMatchKey, str ); |
347 | str->release(); |
348 | |
349 | return( matching ); |
350 | |
351 | } while( false ); |
352 | |
353 | if( matching) |
354 | matching->release(); |
355 | |
356 | return( 0 ); |
357 | } |
358 | |
359 | static int didRam = 0; |
360 | enum { kMaxPathBuf = 512, kMaxBootVar = 128 }; |
361 | |
362 | kern_return_t IOFindBSDRoot( char * rootName, unsigned int rootNameSize, |
363 | dev_t * root, u_int32_t * oflags ) |
364 | { |
365 | mach_timespec_t t; |
366 | IOService * service; |
367 | IORegistryEntry * regEntry; |
368 | OSDictionary * matching = 0; |
369 | OSString * iostr; |
370 | OSNumber * off; |
371 | OSData * data = 0; |
372 | |
373 | UInt32 flags = 0; |
374 | int mnr, mjr; |
375 | const char * mediaProperty = 0; |
376 | char * rdBootVar; |
377 | char * str; |
378 | const char * look = 0; |
379 | int len; |
380 | bool debugInfoPrintedOnce = false; |
381 | const char * uuidStr = NULL; |
382 | |
383 | static int mountAttempts = 0; |
384 | |
385 | int xchar, dchar; |
386 | |
387 | // stall here for anyone matching on the IOBSD resource to finish (filesystems) |
388 | matching = IOService::serviceMatching(gIOResourcesKey); |
389 | assert(matching); |
390 | matching->setObject(gIOResourceMatchedKey, gIOBSDKey); |
391 | |
392 | if ((service = IOService::waitForMatchingService(matching, 30ULL * kSecondScale))) { |
393 | service->release(); |
394 | } else { |
395 | IOLog("!BSD\n" ); |
396 | } |
397 | matching->release(); |
398 | matching = NULL; |
399 | |
400 | if( mountAttempts++) |
401 | { |
402 | IOLog("mount(%d) failed\n" , mountAttempts); |
403 | IOSleep( 5 * 1000 ); |
404 | } |
405 | |
406 | str = (char *) IOMalloc( kMaxPathBuf + kMaxBootVar ); |
407 | if( !str) |
408 | return( kIOReturnNoMemory ); |
409 | rdBootVar = str + kMaxPathBuf; |
410 | |
411 | if (!PE_parse_boot_argn("rd" , rdBootVar, kMaxBootVar ) |
412 | && !PE_parse_boot_argn("rootdev" , rdBootVar, kMaxBootVar )) |
413 | rdBootVar[0] = 0; |
414 | |
415 | do { |
416 | if( (regEntry = IORegistryEntry::fromPath( "/chosen" , gIODTPlane ))) { |
417 | di_root_ramfile(regEntry); |
418 | data = OSDynamicCast(OSData, regEntry->getProperty( "root-matching" )); |
419 | if (data) { |
420 | matching = OSDynamicCast(OSDictionary, OSUnserializeXML((char *)data->getBytesNoCopy())); |
421 | if (matching) { |
422 | continue; |
423 | } |
424 | } |
425 | |
426 | data = (OSData *) regEntry->getProperty( "boot-uuid" ); |
427 | if( data) { |
428 | uuidStr = (const char*)data->getBytesNoCopy(); |
429 | OSString *uuidString = OSString::withCString( uuidStr ); |
430 | |
431 | // match the boot-args boot-uuid processing below |
432 | if( uuidString) { |
433 | IOLog("rooting via boot-uuid from /chosen: %s\n" , uuidStr); |
434 | IOService::publishResource( "boot-uuid" , uuidString ); |
435 | uuidString->release(); |
436 | matching = IOUUIDMatching(); |
437 | mediaProperty = "boot-uuid-media" ; |
438 | regEntry->release(); |
439 | continue; |
440 | } else { |
441 | uuidStr = NULL; |
442 | } |
443 | } |
444 | regEntry->release(); |
445 | } |
446 | } while( false ); |
447 | |
448 | // |
449 | // See if we have a RAMDisk property in /chosen/memory-map. If so, make it into a device. |
450 | // It will become /dev/mdx, where x is 0-f. |
451 | // |
452 | |
453 | if(!didRam) { /* Have we already build this ram disk? */ |
454 | didRam = 1; /* Remember we did this */ |
455 | if((regEntry = IORegistryEntry::fromPath( "/chosen/memory-map" , gIODTPlane ))) { /* Find the map node */ |
456 | data = (OSData *)regEntry->getProperty("RAMDisk" ); /* Find the ram disk, if there */ |
457 | if(data) { /* We found one */ |
458 | uintptr_t *ramdParms; |
459 | ramdParms = (uintptr_t *)data->getBytesNoCopy(); /* Point to the ram disk base and size */ |
460 | (void)mdevadd(-1, ml_static_ptovirt(ramdParms[0]) >> 12, ramdParms[1] >> 12, 0); /* Initialize it and pass back the device number */ |
461 | } |
462 | regEntry->release(); /* Toss the entry */ |
463 | } |
464 | } |
465 | |
466 | // |
467 | // Now check if we are trying to root on a memory device |
468 | // |
469 | |
470 | if((rdBootVar[0] == 'm') && (rdBootVar[1] == 'd') && (rdBootVar[3] == 0)) { |
471 | dchar = xchar = rdBootVar[2]; /* Get the actual device */ |
472 | if((xchar >= '0') && (xchar <= '9')) xchar = xchar - '0'; /* If digit, convert */ |
473 | else { |
474 | xchar = xchar & ~' '; /* Fold to upper case */ |
475 | if((xchar >= 'A') && (xchar <= 'F')) { /* Is this a valid digit? */ |
476 | xchar = (xchar & 0xF) + 9; /* Convert the hex digit */ |
477 | dchar = dchar | ' '; /* Fold to lower case */ |
478 | } |
479 | else xchar = -1; /* Show bogus */ |
480 | } |
481 | if(xchar >= 0) { /* Do we have a valid memory device name? */ |
482 | *root = mdevlookup(xchar); /* Find the device number */ |
483 | if(*root >= 0) { /* Did we find one? */ |
484 | rootName[0] = 'm'; /* Build root name */ |
485 | rootName[1] = 'd'; /* Build root name */ |
486 | rootName[2] = dchar; /* Build root name */ |
487 | rootName[3] = 0; /* Build root name */ |
488 | IOLog("BSD root: %s, major %d, minor %d\n" , rootName, major(*root), minor(*root)); |
489 | *oflags = 0; /* Show that this is not network */ |
490 | |
491 | #if CONFIG_KDP_INTERACTIVE_DEBUGGING |
492 | /* retrieve final ramdisk range and initialize KDP variables */ |
493 | if (mdevgetrange(xchar, &kdp_core_ramdisk_addr, &kdp_core_ramdisk_size) != 0) { |
494 | IOLog("Unable to retrieve range for root memory device %d\n" , xchar); |
495 | kdp_core_ramdisk_addr = 0; |
496 | kdp_core_ramdisk_size = 0; |
497 | } |
498 | #endif |
499 | |
500 | goto iofrootx; /* Join common exit... */ |
501 | } |
502 | panic("IOFindBSDRoot: specified root memory device, %s, has not been configured\n" , rdBootVar); /* Not there */ |
503 | } |
504 | } |
505 | |
506 | if( (!matching) && rdBootVar[0] ) { |
507 | // by BSD name |
508 | look = rdBootVar; |
509 | if( look[0] == '*') |
510 | look++; |
511 | |
512 | if ( strncmp( look, "en" , strlen( "en" )) == 0 ) { |
513 | matching = IONetworkNamePrefixMatching( "en" ); |
514 | } else if ( strncmp( look, "uuid" , strlen( "uuid" )) == 0 ) { |
515 | char *uuid; |
516 | OSString *uuidString; |
517 | |
518 | uuid = (char *)IOMalloc( kMaxBootVar ); |
519 | |
520 | if ( uuid ) { |
521 | if (!PE_parse_boot_argn( "boot-uuid" , uuid, kMaxBootVar )) { |
522 | panic( "rd=uuid but no boot-uuid=<value> specified" ); |
523 | } |
524 | uuidString = OSString::withCString( uuid ); |
525 | if ( uuidString ) { |
526 | IOService::publishResource( "boot-uuid" , uuidString ); |
527 | uuidString->release(); |
528 | IOLog( "\nWaiting for boot volume with UUID %s\n" , uuid ); |
529 | matching = IOUUIDMatching(); |
530 | mediaProperty = "boot-uuid-media" ; |
531 | } |
532 | IOFree( uuid, kMaxBootVar ); |
533 | } |
534 | } else { |
535 | matching = IOBSDNameMatching( look ); |
536 | } |
537 | } |
538 | |
539 | if( !matching) { |
540 | OSString * astring; |
541 | // Match any HFS media |
542 | |
543 | matching = IOService::serviceMatching( "IOMedia" ); |
544 | astring = OSString::withCStringNoCopy("Apple_HFS" ); |
545 | if ( astring ) { |
546 | matching->setObject("Content" , astring); |
547 | astring->release(); |
548 | } |
549 | } |
550 | |
551 | if( gIOKitDebug & kIOWaitQuietBeforeRoot ) { |
552 | IOLog( "Waiting for matching to complete\n" ); |
553 | IOService::getPlatform()->waitQuiet(); |
554 | } |
555 | |
556 | if( true && matching) { |
557 | OSSerialize * s = OSSerialize::withCapacity( 5 ); |
558 | |
559 | if( matching->serialize( s )) { |
560 | IOLog( "Waiting on %s\n" , s->text() ); |
561 | s->release(); |
562 | } |
563 | } |
564 | |
565 | do { |
566 | t.tv_sec = ROOTDEVICETIMEOUT; |
567 | t.tv_nsec = 0; |
568 | matching->retain(); |
569 | service = IOService::waitForService( matching, &t ); |
570 | if( (!service) || (mountAttempts == 10)) { |
571 | PE_display_icon( 0, "noroot" ); |
572 | IOLog( "Still waiting for root device\n" ); |
573 | |
574 | if( !debugInfoPrintedOnce) { |
575 | debugInfoPrintedOnce = true; |
576 | if( gIOKitDebug & kIOLogDTree) { |
577 | IOLog("\nDT plane:\n" ); |
578 | IOPrintPlane( gIODTPlane ); |
579 | } |
580 | if( gIOKitDebug & kIOLogServiceTree) { |
581 | IOLog("\nService plane:\n" ); |
582 | IOPrintPlane( gIOServicePlane ); |
583 | } |
584 | if( gIOKitDebug & kIOLogMemory) |
585 | IOPrintMemory(); |
586 | } |
587 | } |
588 | } while( !service); |
589 | matching->release(); |
590 | |
591 | if ( service && mediaProperty ) { |
592 | service = (IOService *)service->getProperty(mediaProperty); |
593 | } |
594 | |
595 | mjr = 0; |
596 | mnr = 0; |
597 | |
598 | // If the IOService we matched to is a subclass of IONetworkInterface, |
599 | // then make sure it has been registered with BSD and has a BSD name |
600 | // assigned. |
601 | |
602 | if ( service |
603 | && service->metaCast( "IONetworkInterface" ) |
604 | && !IORegisterNetworkInterface( service ) ) |
605 | { |
606 | service = 0; |
607 | } |
608 | |
609 | if( service) { |
610 | |
611 | len = kMaxPathBuf; |
612 | service->getPath( str, &len, gIOServicePlane ); |
613 | IOLog( "Got boot device = %s\n" , str ); |
614 | |
615 | iostr = (OSString *) service->getProperty( kIOBSDNameKey ); |
616 | if( iostr) |
617 | strlcpy( rootName, iostr->getCStringNoCopy(), rootNameSize ); |
618 | off = (OSNumber *) service->getProperty( kIOBSDMajorKey ); |
619 | if( off) |
620 | mjr = off->unsigned32BitValue(); |
621 | off = (OSNumber *) service->getProperty( kIOBSDMinorKey ); |
622 | if( off) |
623 | mnr = off->unsigned32BitValue(); |
624 | |
625 | if( service->metaCast( "IONetworkInterface" )) |
626 | flags |= 1; |
627 | |
628 | } else { |
629 | |
630 | IOLog( "Wait for root failed\n" ); |
631 | strlcpy( rootName, "en0" , rootNameSize ); |
632 | flags |= 1; |
633 | } |
634 | |
635 | IOLog( "BSD root: %s" , rootName ); |
636 | if( mjr) |
637 | IOLog(", major %d, minor %d\n" , mjr, mnr ); |
638 | else |
639 | IOLog("\n" ); |
640 | |
641 | *root = makedev( mjr, mnr ); |
642 | *oflags = flags; |
643 | |
644 | IOFree( str, kMaxPathBuf + kMaxBootVar ); |
645 | |
646 | iofrootx: |
647 | if( (gIOKitDebug & (kIOLogDTree | kIOLogServiceTree | kIOLogMemory)) && !debugInfoPrintedOnce) { |
648 | |
649 | IOService::getPlatform()->waitQuiet(); |
650 | if( gIOKitDebug & kIOLogDTree) { |
651 | IOLog("\nDT plane:\n" ); |
652 | IOPrintPlane( gIODTPlane ); |
653 | } |
654 | if( gIOKitDebug & kIOLogServiceTree) { |
655 | IOLog("\nService plane:\n" ); |
656 | IOPrintPlane( gIOServicePlane ); |
657 | } |
658 | if( gIOKitDebug & kIOLogMemory) |
659 | IOPrintMemory(); |
660 | } |
661 | |
662 | return( kIOReturnSuccess ); |
663 | } |
664 | |
665 | bool IORamDiskBSDRoot(void) |
666 | { |
667 | char rdBootVar[kMaxBootVar]; |
668 | if (PE_parse_boot_argn("rd" , rdBootVar, kMaxBootVar ) |
669 | || PE_parse_boot_argn("rootdev" , rdBootVar, kMaxBootVar )) { |
670 | if((rdBootVar[0] == 'm') && (rdBootVar[1] == 'd') && (rdBootVar[3] == 0)) { |
671 | return true; |
672 | } |
673 | } |
674 | return false; |
675 | } |
676 | |
677 | void IOSecureBSDRoot(const char * rootName) |
678 | { |
679 | #if CONFIG_EMBEDDED |
680 | int tmpInt; |
681 | IOReturn result; |
682 | IOPlatformExpert *pe; |
683 | OSDictionary *matching; |
684 | const OSSymbol *functionName = OSSymbol::withCStringNoCopy("SecureRootName" ); |
685 | |
686 | matching = IOService::serviceMatching("IOPlatformExpert" ); |
687 | assert(matching); |
688 | pe = (IOPlatformExpert *) IOService::waitForMatchingService(matching, 30ULL * kSecondScale); |
689 | matching->release(); |
690 | assert(pe); |
691 | // Returns kIOReturnNotPrivileged is the root device is not secure. |
692 | // Returns kIOReturnUnsupported if "SecureRootName" is not implemented. |
693 | result = pe->callPlatformFunction(functionName, false, (void *)rootName, (void *)0, (void *)0, (void *)0); |
694 | functionName->release(); |
695 | OSSafeReleaseNULL(pe); |
696 | |
697 | if (result == kIOReturnNotPrivileged) { |
698 | mdevremoveall(); |
699 | } else if (result == kIOReturnSuccess) { |
700 | // If we are booting with a secure root, and we have the right |
701 | // boot-arg, we will want to panic on exception triage. This |
702 | // behavior is intended as a debug aid (we can look at why an |
703 | // exception occured in the kernel debugger). |
704 | if (PE_parse_boot_argn("-panic_on_exception_triage" , &tmpInt, sizeof(tmpInt))) { |
705 | panic_on_exception_triage = 1; |
706 | } |
707 | } |
708 | |
709 | #endif // CONFIG_EMBEDDED |
710 | } |
711 | |
712 | void * |
713 | IOBSDRegistryEntryForDeviceTree(char * path) |
714 | { |
715 | return (IORegistryEntry::fromPath(path, gIODTPlane)); |
716 | } |
717 | |
718 | void |
719 | IOBSDRegistryEntryRelease(void * entry) |
720 | { |
721 | IORegistryEntry * regEntry = (IORegistryEntry *)entry; |
722 | |
723 | if (regEntry) |
724 | regEntry->release(); |
725 | return; |
726 | } |
727 | |
728 | const void * |
729 | IOBSDRegistryEntryGetData(void * entry, char * property_name, |
730 | int * packet_length) |
731 | { |
732 | OSData * data; |
733 | IORegistryEntry * regEntry = (IORegistryEntry *)entry; |
734 | |
735 | data = (OSData *) regEntry->getProperty(property_name); |
736 | if (data) { |
737 | *packet_length = data->getLength(); |
738 | return (data->getBytesNoCopy()); |
739 | } |
740 | return (NULL); |
741 | } |
742 | |
743 | kern_return_t IOBSDGetPlatformUUID( uuid_t uuid, mach_timespec_t timeout ) |
744 | { |
745 | IOService * resources; |
746 | OSString * string; |
747 | |
748 | resources = IOService::waitForService( IOService::resourceMatching( kIOPlatformUUIDKey ), ( timeout.tv_sec || timeout.tv_nsec ) ? &timeout : 0 ); |
749 | if ( resources == 0 ) return KERN_OPERATION_TIMED_OUT; |
750 | |
751 | string = ( OSString * ) IOService::getPlatform( )->getProvider( )->getProperty( kIOPlatformUUIDKey ); |
752 | if ( string == 0 ) return KERN_NOT_SUPPORTED; |
753 | |
754 | uuid_parse( string->getCStringNoCopy( ), uuid ); |
755 | |
756 | return KERN_SUCCESS; |
757 | } |
758 | |
759 | } /* extern "C" */ |
760 | |
761 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
762 | |
763 | #include <sys/conf.h> |
764 | #include <sys/vnode.h> |
765 | #include <sys/vnode_internal.h> |
766 | #include <sys/fcntl.h> |
767 | #include <IOKit/IOPolledInterface.h> |
768 | #include <IOKit/IOBufferMemoryDescriptor.h> |
769 | |
770 | IOPolledFileIOVars * gIOPolledCoreFileVars; |
771 | kern_return_t gIOPolledCoreFileOpenRet = kIOReturnNotReady; |
772 | #if IOPOLLED_COREFILE |
773 | |
774 | static IOReturn |
775 | IOOpenPolledCoreFile(const char * filename) |
776 | { |
777 | IOReturn err; |
778 | unsigned int debug; |
779 | uint64_t corefile_size_bytes = 0; |
780 | |
781 | if (gIOPolledCoreFileVars) return (kIOReturnBusy); |
782 | if (!IOPolledInterface::gMetaClass.getInstanceCount()) return (kIOReturnUnsupported); |
783 | |
784 | debug = 0; |
785 | PE_parse_boot_argn("debug" , &debug, sizeof (debug)); |
786 | if (DB_DISABLE_LOCAL_CORE & debug) return (kIOReturnUnsupported); |
787 | |
788 | #if CONFIG_EMBEDDED |
789 | unsigned int requested_corefile_size = 0; |
790 | if (PE_parse_boot_argn("corefile_size_mb" , &requested_corefile_size, sizeof(requested_corefile_size))) { |
791 | IOLog("Boot-args specify %d MB kernel corefile\n" , requested_corefile_size); |
792 | |
793 | corefile_size_bytes = (requested_corefile_size * 1024ULL * 1024ULL); |
794 | } |
795 | #endif |
796 | |
797 | |
798 | do { |
799 | #if defined(kIOCoreDumpLargeSize) |
800 | if (0 == corefile_size_bytes) |
801 | { |
802 | // If no custom size was requested and we're on a device with >3GB of DRAM, attempt |
803 | // to allocate a large corefile otherwise use a small file. |
804 | if (max_mem > (3 * 1024ULL * 1024ULL * 1024ULL)) |
805 | { |
806 | corefile_size_bytes = kIOCoreDumpLargeSize; |
807 | err = IOPolledFileOpen(filename, |
808 | kIOPolledFileCreate, |
809 | corefile_size_bytes, kIOCoreDumpFreeSize, |
810 | NULL, 0, |
811 | &gIOPolledCoreFileVars, NULL, NULL, 0); |
812 | if (kIOReturnSuccess == err) |
813 | { |
814 | break; |
815 | } |
816 | else if (kIOReturnNoSpace == err) |
817 | { |
818 | IOLog("Failed to open corefile of size %llu MB (low disk space)" , |
819 | (corefile_size_bytes / (1024ULL * 1024ULL))); |
820 | if (corefile_size_bytes == kIOCoreDumpMinSize) |
821 | { |
822 | gIOPolledCoreFileOpenRet = err; |
823 | return (err); |
824 | } |
825 | // Try to open a smaller corefile (set size and fall-through) |
826 | corefile_size_bytes = kIOCoreDumpMinSize; |
827 | } |
828 | else |
829 | { |
830 | IOLog("Failed to open corefile of size %llu MB (returned error 0x%x)\n" , |
831 | (corefile_size_bytes / (1024ULL * 1024ULL)), err); |
832 | gIOPolledCoreFileOpenRet = err; |
833 | return (err); |
834 | } |
835 | } |
836 | else |
837 | { |
838 | corefile_size_bytes = kIOCoreDumpMinSize; |
839 | } |
840 | } |
841 | #else /* defined(kIOCoreDumpLargeSize) */ |
842 | if (0 == corefile_size_bytes) |
843 | { |
844 | corefile_size_bytes = kIOCoreDumpSize; |
845 | } |
846 | #endif /* defined(kIOCoreDumpLargeSize) */ |
847 | err = IOPolledFileOpen(filename, |
848 | kIOPolledFileCreate, |
849 | corefile_size_bytes, kIOCoreDumpFreeSize, |
850 | NULL, 0, |
851 | &gIOPolledCoreFileVars, NULL, NULL, 0); |
852 | if (kIOReturnSuccess != err) |
853 | { |
854 | IOLog("Failed to open corefile of size %llu MB (returned error 0x%x)\n" , |
855 | (corefile_size_bytes / (1024ULL * 1024ULL)), err); |
856 | gIOPolledCoreFileOpenRet = err; |
857 | return (err); |
858 | } |
859 | } while (false); |
860 | |
861 | err = IOPolledFilePollersSetup(gIOPolledCoreFileVars, kIOPolledPreflightCoreDumpState); |
862 | if (kIOReturnSuccess != err) |
863 | { |
864 | IOPolledFileClose(&gIOPolledCoreFileVars, NULL, NULL, 0, 0, 0); |
865 | IOLog("IOPolledFilePollersSetup for corefile failed with error: 0x%x\n" , err); |
866 | gIOPolledCoreFileOpenRet = err; |
867 | } |
868 | else |
869 | { |
870 | IOLog("Opened corefile of size %llu MB\n" , (corefile_size_bytes / (1024ULL * 1024ULL))); |
871 | } |
872 | |
873 | return (err); |
874 | } |
875 | |
876 | static void |
877 | IOClosePolledCoreFile(void) |
878 | { |
879 | gIOPolledCoreFileOpenRet = kIOReturnNotOpen; |
880 | IOPolledFilePollersClose(gIOPolledCoreFileVars, kIOPolledPostflightCoreDumpState); |
881 | IOPolledFileClose(&gIOPolledCoreFileVars, NULL, NULL, 0, 0, 0); |
882 | } |
883 | |
884 | static thread_call_t gIOOpenPolledCoreFileTC; |
885 | static IONotifier * gIOPolledCoreFileNotifier; |
886 | static IONotifier * gIOPolledCoreFileInterestNotifier; |
887 | |
888 | static IOReturn |
889 | KernelCoreMediaInterest(void * target, void * refCon, |
890 | UInt32 messageType, IOService * provider, |
891 | void * messageArgument, vm_size_t argSize ) |
892 | { |
893 | if (kIOMessageServiceIsTerminated == messageType) |
894 | { |
895 | gIOPolledCoreFileInterestNotifier->remove(); |
896 | gIOPolledCoreFileInterestNotifier = 0; |
897 | IOClosePolledCoreFile(); |
898 | } |
899 | |
900 | return (kIOReturnSuccess); |
901 | } |
902 | |
903 | static void |
904 | OpenKernelCoreMedia(thread_call_param_t p0, thread_call_param_t p1) |
905 | { |
906 | IOService * newService; |
907 | OSString * string; |
908 | char filename[16]; |
909 | |
910 | newService = (IOService *) p1; |
911 | do |
912 | { |
913 | if (gIOPolledCoreFileVars) break; |
914 | string = OSDynamicCast(OSString, newService->getProperty(kIOBSDNameKey)); |
915 | if (!string) break; |
916 | snprintf(filename, sizeof(filename), "/dev/%s" , string->getCStringNoCopy()); |
917 | if (kIOReturnSuccess != IOOpenPolledCoreFile(filename)) break; |
918 | gIOPolledCoreFileInterestNotifier = newService->registerInterest( |
919 | gIOGeneralInterest, &KernelCoreMediaInterest, NULL, 0); |
920 | } |
921 | while (false); |
922 | |
923 | newService->release(); |
924 | } |
925 | |
926 | static bool |
927 | NewKernelCoreMedia(void * target, void * refCon, |
928 | IOService * newService, |
929 | IONotifier * notifier) |
930 | { |
931 | static volatile UInt32 onlyOneCorePartition = 0; |
932 | do |
933 | { |
934 | if (!OSCompareAndSwap(0, 1, &onlyOneCorePartition)) break; |
935 | if (gIOPolledCoreFileVars) break; |
936 | if (!gIOOpenPolledCoreFileTC) break; |
937 | newService = newService->getProvider(); |
938 | if (!newService) break; |
939 | newService->retain(); |
940 | thread_call_enter1(gIOOpenPolledCoreFileTC, newService); |
941 | } |
942 | while (false); |
943 | |
944 | return (false); |
945 | } |
946 | |
947 | #endif /* IOPOLLED_COREFILE */ |
948 | |
949 | extern "C" void |
950 | IOBSDMountChange(struct mount * mp, uint32_t op) |
951 | { |
952 | #if IOPOLLED_COREFILE |
953 | |
954 | OSDictionary * bsdMatching; |
955 | OSDictionary * mediaMatching; |
956 | OSString * string; |
957 | |
958 | if (!gIOPolledCoreFileNotifier) do |
959 | { |
960 | if (!gIOOpenPolledCoreFileTC) gIOOpenPolledCoreFileTC = thread_call_allocate(&OpenKernelCoreMedia, NULL); |
961 | bsdMatching = IOService::serviceMatching("IOMediaBSDClient" ); |
962 | if (!bsdMatching) break; |
963 | mediaMatching = IOService::serviceMatching("IOMedia" ); |
964 | string = OSString::withCStringNoCopy("5361644D-6163-11AA-AA11-00306543ECAC" ); |
965 | if (!string || !mediaMatching) break; |
966 | mediaMatching->setObject("Content" , string); |
967 | string->release(); |
968 | bsdMatching->setObject(gIOParentMatchKey, mediaMatching); |
969 | mediaMatching->release(); |
970 | |
971 | gIOPolledCoreFileNotifier = IOService::addMatchingNotification( |
972 | gIOFirstMatchNotification, bsdMatching, |
973 | &NewKernelCoreMedia, NULL, NULL, -1000); |
974 | } |
975 | while (false); |
976 | |
977 | #if CONFIG_EMBEDDED |
978 | uint64_t flags; |
979 | char path[128]; |
980 | int pathLen; |
981 | vnode_t vn; |
982 | int result; |
983 | |
984 | switch (op) |
985 | { |
986 | case kIOMountChangeMount: |
987 | case kIOMountChangeDidResize: |
988 | |
989 | if (gIOPolledCoreFileVars) break; |
990 | flags = vfs_flags(mp); |
991 | if (MNT_RDONLY & flags) break; |
992 | if (!(MNT_LOCAL & flags)) break; |
993 | |
994 | vn = vfs_vnodecovered(mp); |
995 | if (!vn) break; |
996 | pathLen = sizeof(path); |
997 | result = vn_getpath(vn, &path[0], &pathLen); |
998 | vnode_put(vn); |
999 | if (0 != result) break; |
1000 | if (!pathLen) break; |
1001 | #if defined(XNU_TARGET_OS_BRIDGE) |
1002 | // on bridgeOS systems we put the core in /private/var/internal. We don't |
1003 | // want to match with /private/var because /private/var/internal is often mounted |
1004 | // over /private/var |
1005 | if ((pathLen - 1) < (int) strlen("/private/var/internal" )) break; |
1006 | #endif |
1007 | if (0 != strncmp(path, kIOCoreDumpPath, pathLen - 1)) break; |
1008 | IOOpenPolledCoreFile(kIOCoreDumpPath); |
1009 | break; |
1010 | |
1011 | case kIOMountChangeUnmount: |
1012 | case kIOMountChangeWillResize: |
1013 | if (gIOPolledCoreFileVars && (mp == kern_file_mount(gIOPolledCoreFileVars->fileRef))) |
1014 | { |
1015 | IOClosePolledCoreFile(); |
1016 | } |
1017 | break; |
1018 | } |
1019 | #endif /* CONFIG_EMBEDDED */ |
1020 | #endif /* IOPOLLED_COREFILE */ |
1021 | } |
1022 | |
1023 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
1024 | |
1025 | extern "C" boolean_t |
1026 | IOTaskHasEntitlement(task_t task, const char * entitlement) |
1027 | { |
1028 | OSObject * obj; |
1029 | obj = IOUserClient::copyClientEntitlement(task, entitlement); |
1030 | if (!obj) return (false); |
1031 | obj->release(); |
1032 | return (obj != kOSBooleanFalse); |
1033 | } |
1034 | |
1035 | |