1 /* Copyright (c) Mark Harmstone 2016-17
3 * This file is part of WinBtrfs.
5 * WinBtrfs is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public Licence as published by
7 * the Free Software Foundation, either version 3 of the Licence, or
8 * (at your option) any later version.
10 * WinBtrfs is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser General Public Licence for more details.
15 * You should have received a copy of the GNU Lesser General Public Licence
16 * along with WinBtrfs. If not, see <http://www.gnu.org/licenses/>. */
22 #include "btrfs_drv.h"
49 #define INCOMPAT_SUPPORTED (BTRFS_INCOMPAT_FLAGS_MIXED_BACKREF | BTRFS_INCOMPAT_FLAGS_DEFAULT_SUBVOL | BTRFS_INCOMPAT_FLAGS_MIXED_GROUPS | \
50 BTRFS_INCOMPAT_FLAGS_COMPRESS_LZO | BTRFS_INCOMPAT_FLAGS_BIG_METADATA | BTRFS_INCOMPAT_FLAGS_RAID56 | \
51 BTRFS_INCOMPAT_FLAGS_EXTENDED_IREF | BTRFS_INCOMPAT_FLAGS_SKINNY_METADATA | BTRFS_INCOMPAT_FLAGS_NO_HOLES)
52 #define COMPAT_RO_SUPPORTED (BTRFS_COMPAT_RO_FLAGS_FREE_SPACE_CACHE | BTRFS_COMPAT_RO_FLAGS_FREE_SPACE_CACHE_VALID)
54 static WCHAR device_name
[] = {'\\','B','t','r','f','s',0};
55 static WCHAR dosdevice_name
[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\','B','t','r','f','s',0};
57 DEFINE_GUID(BtrfsBusInterface
, 0x4d414874, 0x6865, 0x6761, 0x6d, 0x65, 0x83, 0x69, 0x17, 0x9a, 0x7d, 0x1d);
59 PDRIVER_OBJECT drvobj
;
60 PDEVICE_OBJECT master_devobj
;
62 BOOL have_sse42
= FALSE
, have_sse2
= FALSE
;
65 LIST_ENTRY uid_map_list
, gid_map_list
;
67 ERESOURCE global_loading_lock
;
68 UINT32 debug_log_level
= 0;
69 UINT32 mount_compress
= 0;
70 UINT32 mount_compress_force
= 0;
71 UINT32 mount_compress_type
= 0;
72 UINT32 mount_zlib_level
= 3;
73 UINT32 mount_flush_interval
= 30;
74 UINT32 mount_max_inline
= 2048;
75 UINT32 mount_skip_balance
= 0;
76 UINT32 mount_no_barrier
= 0;
77 UINT32 mount_no_trim
= 0;
78 UINT32 mount_clear_cache
= 0;
79 UINT32 mount_allow_degraded
= 0;
80 UINT32 mount_readonly
= 0;
82 BOOL log_started
= FALSE
;
83 UNICODE_STRING log_device
, log_file
, registry_path
;
84 tPsUpdateDiskCounters fPsUpdateDiskCounters
;
85 tCcCopyReadEx fCcCopyReadEx
;
86 tCcCopyWriteEx fCcCopyWriteEx
;
87 tCcSetAdditionalCacheAttributesEx fCcSetAdditionalCacheAttributesEx
;
88 tFsRtlUpdateDiskCounters fFsRtlUpdateDiskCounters
;
90 void *notification_entry
= NULL
, *notification_entry2
= NULL
, *notification_entry3
= NULL
;
91 ERESOURCE pdo_list_lock
, mapping_lock
;
93 BOOL finished_probing
= FALSE
;
94 HANDLE degraded_wait_handle
= NULL
, mountmgr_thread_handle
= NULL
;
95 BOOL degraded_wait
= TRUE
;
96 KEVENT mountmgr_thread_event
;
97 BOOL shutting_down
= FALSE
;
100 PFILE_OBJECT comfo
= NULL
;
101 PDEVICE_OBJECT comdo
= NULL
;
102 HANDLE log_handle
= NULL
;
104 HANDLE serial_thread_handle
= NULL
;
106 static void init_serial(BOOL first_time
);
109 static NTSTATUS
close_file(_In_ PFILE_OBJECT FileObject
, _In_ PIRP Irp
);
113 IO_STATUS_BLOCK iosb
;
117 _Function_class_(IO_COMPLETION_ROUTINE
)
118 static NTSTATUS
dbg_completion(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
, _In_ PVOID conptr
) {
119 read_context
* context
= conptr
;
121 UNUSED(DeviceObject
);
123 context
->iosb
= Irp
->IoStatus
;
124 KeSetEvent(&context
->Event
, 0, FALSE
);
126 return STATUS_MORE_PROCESSING_REQUIRED
;
129 #ifdef DEBUG_LONG_MESSAGES
130 void _debug_message(_In_
const char* func
, _In_
const char* file
, _In_
unsigned int line
, _In_
char* s
, ...) {
132 void _debug_message(_In_
const char* func
, _In_
char* s
, ...) {
134 LARGE_INTEGER offset
;
135 PIO_STACK_LOCATION IrpSp
;
140 read_context context
;
143 buf2
= ExAllocatePoolWithTag(NonPagedPool
, 1024, ALLOC_TAG
);
146 DbgPrint("Couldn't allocate buffer in debug_message\n");
150 #ifdef DEBUG_LONG_MESSAGES
151 sprintf(buf2
, "%p:%s:%s:%u:", PsGetCurrentThread(), func
, file
, line
);
153 sprintf(buf2
, "%p:%s:", PsGetCurrentThread(), func
);
155 buf
= &buf2
[strlen(buf2
)];
158 vsprintf(buf
, s
, ap
);
160 ExAcquireResourceSharedLite(&log_lock
, TRUE
);
162 if (!log_started
|| (log_device
.Length
== 0 && log_file
.Length
== 0)) {
164 } else if (log_device
.Length
> 0) {
166 DbgPrint("comdo is NULL :-(\n");
171 length
= (UINT32
)strlen(buf2
);
173 offset
.u
.LowPart
= 0;
174 offset
.u
.HighPart
= 0;
176 RtlZeroMemory(&context
, sizeof(read_context
));
178 KeInitializeEvent(&context
.Event
, NotificationEvent
, FALSE
);
180 Irp
= IoAllocateIrp(comdo
->StackSize
, FALSE
);
183 DbgPrint("IoAllocateIrp failed\n");
187 IrpSp
= IoGetNextIrpStackLocation(Irp
);
188 IrpSp
->MajorFunction
= IRP_MJ_WRITE
;
190 if (comdo
->Flags
& DO_BUFFERED_IO
) {
191 Irp
->AssociatedIrp
.SystemBuffer
= buf2
;
193 Irp
->Flags
= IRP_BUFFERED_IO
;
194 } else if (comdo
->Flags
& DO_DIRECT_IO
) {
195 Irp
->MdlAddress
= IoAllocateMdl(buf2
, length
, FALSE
, FALSE
, NULL
);
196 if (!Irp
->MdlAddress
) {
197 DbgPrint("IoAllocateMdl failed\n");
201 MmBuildMdlForNonPagedPool(Irp
->MdlAddress
);
203 Irp
->UserBuffer
= buf2
;
206 IrpSp
->Parameters
.Write
.Length
= length
;
207 IrpSp
->Parameters
.Write
.ByteOffset
= offset
;
209 Irp
->UserIosb
= &context
.iosb
;
211 Irp
->UserEvent
= &context
.Event
;
213 IoSetCompletionRoutine(Irp
, dbg_completion
, &context
, TRUE
, TRUE
, TRUE
);
215 Status
= IoCallDriver(comdo
, Irp
);
217 if (Status
== STATUS_PENDING
) {
218 KeWaitForSingleObject(&context
.Event
, Executive
, KernelMode
, FALSE
, NULL
);
219 Status
= context
.iosb
.Status
;
222 if (comdo
->Flags
& DO_DIRECT_IO
)
223 IoFreeMdl(Irp
->MdlAddress
);
225 if (!NT_SUCCESS(Status
)) {
226 DbgPrint("failed to write to COM1 - error %08x\n", Status
);
232 } else if (log_handle
!= NULL
) {
233 IO_STATUS_BLOCK iosb
;
235 length
= (UINT32
)strlen(buf2
);
237 Status
= ZwWriteFile(log_handle
, NULL
, NULL
, NULL
, &iosb
, buf2
, length
, NULL
, NULL
);
239 if (!NT_SUCCESS(Status
)) {
240 DbgPrint("failed to write to file - error %08x\n", Status
);
245 ExReleaseResourceLite(&log_lock
);
254 BOOL
is_top_level(_In_ PIRP Irp
) {
255 if (!IoGetTopLevelIrp()) {
256 IoSetTopLevelIrp(Irp
);
263 _Function_class_(DRIVER_UNLOAD
)
265 static void NTAPI
DriverUnload(_In_ PDRIVER_OBJECT DriverObject
) {
267 static void DriverUnload(_In_ PDRIVER_OBJECT DriverObject
) {
269 UNICODE_STRING dosdevice_nameW
;
271 ERR("DriverUnload\n");
275 IoUnregisterFileSystem(DriverObject
->DeviceObject
);
277 if (notification_entry2
)
279 IoUnregisterPlugPlayNotification(notification_entry2
);
281 IoUnregisterPlugPlayNotificationEx(notification_entry2
);
284 if (notification_entry3
)
286 IoUnregisterPlugPlayNotification(notification_entry3
);
288 IoUnregisterPlugPlayNotificationEx(notification_entry3
);
291 if (notification_entry
)
293 IoUnregisterPlugPlayNotification(notification_entry
);
295 IoUnregisterPlugPlayNotificationEx(notification_entry
);
298 dosdevice_nameW
.Buffer
= dosdevice_name
;
299 dosdevice_nameW
.Length
= dosdevice_nameW
.MaximumLength
= (USHORT
)wcslen(dosdevice_name
) * sizeof(WCHAR
);
301 IoDeleteSymbolicLink(&dosdevice_nameW
);
302 IoDeleteDevice(DriverObject
->DeviceObject
);
304 while (!IsListEmpty(&uid_map_list
)) {
305 LIST_ENTRY
* le
= RemoveHeadList(&uid_map_list
);
306 uid_map
* um
= CONTAINING_RECORD(le
, uid_map
, listentry
);
313 while (!IsListEmpty(&gid_map_list
)) {
314 gid_map
* gm
= CONTAINING_RECORD(RemoveHeadList(&gid_map_list
), gid_map
, listentry
);
320 // FIXME - free volumes and their devpaths
324 ObDereferenceObject(comfo
);
330 ExDeleteResourceLite(&global_loading_lock
);
331 ExDeleteResourceLite(&pdo_list_lock
);
333 if (log_device
.Buffer
)
334 ExFreePool(log_device
.Buffer
);
337 ExFreePool(log_file
.Buffer
);
339 if (registry_path
.Buffer
)
340 ExFreePool(registry_path
.Buffer
);
343 ExDeleteResourceLite(&log_lock
);
345 ExDeleteResourceLite(&mapping_lock
);
348 static BOOL
get_last_inode(_In_
_Requires_exclusive_lock_held_(_Curr_
->tree_lock
) device_extension
* Vcb
, _In_ root
* r
, _In_opt_ PIRP Irp
) {
350 traverse_ptr tp
, prev_tp
;
354 searchkey
.obj_id
= 0xffffffffffffffff;
355 searchkey
.obj_type
= 0xff;
356 searchkey
.offset
= 0xffffffffffffffff;
358 Status
= find_item(Vcb
, r
, &tp
, &searchkey
, FALSE
, Irp
);
359 if (!NT_SUCCESS(Status
)) {
360 ERR("error - find_item returned %08x\n", Status
);
364 if (tp
.item
->key
.obj_type
== TYPE_INODE_ITEM
|| (tp
.item
->key
.obj_type
== TYPE_ROOT_ITEM
&& !(tp
.item
->key
.obj_id
& 0x8000000000000000))) {
365 r
->lastinode
= tp
.item
->key
.obj_id
;
366 TRACE("last inode for tree %llx is %llx\n", r
->id
, r
->lastinode
);
370 while (find_prev_item(Vcb
, &tp
, &prev_tp
, Irp
)) {
373 TRACE("moving on to %llx,%x,%llx\n", tp
.item
->key
.obj_id
, tp
.item
->key
.obj_type
, tp
.item
->key
.offset
);
375 if (tp
.item
->key
.obj_type
== TYPE_INODE_ITEM
|| (tp
.item
->key
.obj_type
== TYPE_ROOT_ITEM
&& !(tp
.item
->key
.obj_id
& 0x8000000000000000))) {
376 r
->lastinode
= tp
.item
->key
.obj_id
;
377 TRACE("last inode for tree %llx is %llx\n", r
->id
, r
->lastinode
);
382 r
->lastinode
= SUBVOL_ROOT_INODE
;
384 WARN("no INODE_ITEMs in tree %llx\n", r
->id
);
390 static BOOL
extract_xattr(_In_reads_bytes_(size
) void* item
, _In_ USHORT size
, _In_z_
char* name
, _Out_ UINT8
** data
, _Out_ UINT16
* datalen
) {
391 DIR_ITEM
* xa
= (DIR_ITEM
*)item
;
395 if (size
< sizeof(DIR_ITEM
) || size
< (sizeof(DIR_ITEM
) - 1 + xa
->m
+ xa
->n
)) {
396 WARN("DIR_ITEM is truncated\n");
400 if (xa
->n
== strlen(name
) && RtlCompareMemory(name
, xa
->name
, xa
->n
) == xa
->n
) {
401 TRACE("found xattr %s\n", name
);
406 *data
= ExAllocatePoolWithTag(PagedPool
, xa
->m
, ALLOC_TAG
);
408 ERR("out of memory\n");
412 RtlCopyMemory(*data
, &xa
->name
[xa
->n
], xa
->m
);
419 xasize
= sizeof(DIR_ITEM
) - 1 + xa
->m
+ xa
->n
;
423 xa
= (DIR_ITEM
*)&xa
->name
[xa
->m
+ xa
->n
];
428 TRACE("xattr %s not found\n", name
);
434 BOOL
get_xattr(_In_
_Requires_lock_held_(_Curr_
->tree_lock
) device_extension
* Vcb
, _In_ root
* subvol
, _In_ UINT64 inode
, _In_z_
char* name
, _In_ UINT32 crc32
,
435 _Out_ UINT8
** data
, _Out_ UINT16
* datalen
, _In_opt_ PIRP Irp
) {
440 TRACE("(%p, %llx, %llx, %s, %08x, %p, %p)\n", Vcb
, subvol
->id
, inode
, name
, crc32
, data
, datalen
);
442 searchkey
.obj_id
= inode
;
443 searchkey
.obj_type
= TYPE_XATTR_ITEM
;
444 searchkey
.offset
= crc32
;
446 Status
= find_item(Vcb
, subvol
, &tp
, &searchkey
, FALSE
, Irp
);
447 if (!NT_SUCCESS(Status
)) {
448 ERR("error - find_item returned %08x\n", Status
);
452 if (keycmp(tp
.item
->key
, searchkey
)) {
453 TRACE("could not find item (%llx,%x,%llx)\n", searchkey
.obj_id
, searchkey
.obj_type
, searchkey
.offset
);
457 if (tp
.item
->size
< sizeof(DIR_ITEM
)) {
458 ERR("(%llx,%x,%llx) was %u bytes, expected at least %u\n", tp
.item
->key
.obj_id
, tp
.item
->key
.obj_type
, tp
.item
->key
.offset
, tp
.item
->size
, sizeof(DIR_ITEM
));
462 return extract_xattr(tp
.item
->data
, tp
.item
->size
, name
, data
, datalen
);
465 _Dispatch_type_(IRP_MJ_CLOSE
)
466 _Function_class_(DRIVER_DISPATCH
)
467 static NTSTATUS
drv_close(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
469 PIO_STACK_LOCATION IrpSp
;
470 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
473 FsRtlEnterFileSystem();
477 top_level
= is_top_level(Irp
);
479 if (DeviceObject
== master_devobj
) {
480 TRACE("Closing file system\n");
481 Status
= STATUS_SUCCESS
;
483 } else if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
484 Status
= vol_close(DeviceObject
, Irp
);
486 } else if (!Vcb
|| Vcb
->type
!= VCB_TYPE_FS
) {
487 Status
= STATUS_INVALID_PARAMETER
;
491 IrpSp
= IoGetCurrentIrpStackLocation(Irp
);
493 // FIXME - unmount if called for volume
494 // FIXME - call FsRtlNotifyUninitializeSync(&Vcb->NotifySync) if unmounting
496 Status
= close_file(IrpSp
->FileObject
, Irp
);
499 Irp
->IoStatus
.Status
= Status
;
500 Irp
->IoStatus
.Information
= 0;
502 IoCompleteRequest( Irp
, IO_DISK_INCREMENT
);
505 IoSetTopLevelIrp(NULL
);
507 TRACE("returning %08x\n", Status
);
509 FsRtlExitFileSystem();
514 _Dispatch_type_(IRP_MJ_FLUSH_BUFFERS
)
515 _Function_class_(DRIVER_DISPATCH
)
516 static NTSTATUS
drv_flush_buffers(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
518 PIO_STACK_LOCATION IrpSp
= IoGetCurrentIrpStackLocation( Irp
);
519 PFILE_OBJECT FileObject
= IrpSp
->FileObject
;
520 fcb
* fcb
= FileObject
->FsContext
;
521 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
524 FsRtlEnterFileSystem();
526 TRACE("flush buffers\n");
528 top_level
= is_top_level(Irp
);
530 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
531 Status
= vol_flush_buffers(DeviceObject
, Irp
);
533 } else if (!Vcb
|| Vcb
->type
!= VCB_TYPE_FS
) {
534 Status
= STATUS_INVALID_PARAMETER
;
539 ERR("fcb was NULL\n");
540 Status
= STATUS_INVALID_PARAMETER
;
544 if (fcb
== Vcb
->volume_fcb
) {
545 Status
= STATUS_INVALID_PARAMETER
;
549 Irp
->IoStatus
.Information
= 0;
551 fcb
->Header
.IsFastIoPossible
= fast_io_possible(fcb
);
553 Status
= STATUS_SUCCESS
;
554 Irp
->IoStatus
.Status
= Status
;
556 if (fcb
->type
!= BTRFS_TYPE_DIRECTORY
) {
557 CcFlushCache(&fcb
->nonpaged
->segment_object
, NULL
, 0, &Irp
->IoStatus
);
559 if (fcb
->Header
.PagingIoResource
) {
560 ExAcquireResourceExclusiveLite(fcb
->Header
.PagingIoResource
, TRUE
);
561 ExReleaseResourceLite(fcb
->Header
.PagingIoResource
);
564 Status
= Irp
->IoStatus
.Status
;
568 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
570 TRACE("returning %08x\n", Status
);
573 IoSetTopLevelIrp(NULL
);
575 FsRtlExitFileSystem();
580 static void calculate_total_space(_In_ device_extension
* Vcb
, _Out_ UINT64
* totalsize
, _Out_ UINT64
* freespace
) {
581 UINT64 nfactor
, dfactor
, sectors_used
;
583 if (Vcb
->data_flags
& BLOCK_FLAG_DUPLICATE
|| Vcb
->data_flags
& BLOCK_FLAG_RAID1
|| Vcb
->data_flags
& BLOCK_FLAG_RAID10
) {
586 } else if (Vcb
->data_flags
& BLOCK_FLAG_RAID5
) {
587 nfactor
= Vcb
->superblock
.num_devices
- 1;
588 dfactor
= Vcb
->superblock
.num_devices
;
589 } else if (Vcb
->data_flags
& BLOCK_FLAG_RAID6
) {
590 nfactor
= Vcb
->superblock
.num_devices
- 2;
591 dfactor
= Vcb
->superblock
.num_devices
;
597 sectors_used
= Vcb
->superblock
.bytes_used
/ Vcb
->superblock
.sector_size
;
599 *totalsize
= (Vcb
->superblock
.total_bytes
/ Vcb
->superblock
.sector_size
) * nfactor
/ dfactor
;
600 *freespace
= sectors_used
> *totalsize
? 0 : (*totalsize
- sectors_used
);
604 // This function exists because we have to lie about our FS type in certain situations.
605 // MPR!MprGetConnection queries the FS type, and compares it to a whitelist. If it doesn't match,
606 // it will return ERROR_NO_NET_OR_BAD_PATH, which prevents UAC from working.
607 // The command mklink refuses to create hard links on anything other than NTFS, so we have to
608 // blacklist cmd.exe too.
610 static BOOL
lie_about_fs_type() {
612 PROCESS_BASIC_INFORMATION pbi
;
617 static WCHAR mpr
[] = L
"MPR.DLL";
618 static WCHAR cmd
[] = L
"CMD.EXE";
619 static WCHAR fsutil
[] = L
"FSUTIL.EXE";
620 UNICODE_STRING mprus
, cmdus
, fsutilus
;
623 mprus
.Length
= mprus
.MaximumLength
= (USHORT
)(wcslen(mpr
) * sizeof(WCHAR
));
625 cmdus
.Length
= cmdus
.MaximumLength
= (USHORT
)(wcslen(cmd
) * sizeof(WCHAR
));
626 fsutilus
.Buffer
= fsutil
;
627 fsutilus
.Length
= fsutilus
.MaximumLength
= (USHORT
)(wcslen(fsutil
) * sizeof(WCHAR
));
629 if (!PsGetCurrentProcess())
632 Status
= ZwQueryInformationProcess(NtCurrentProcess(), ProcessBasicInformation
, &pbi
, sizeof(pbi
), &retlen
);
634 if (!NT_SUCCESS(Status
)) {
635 ERR("ZwQueryInformationProcess returned %08x\n", Status
);
639 if (!pbi
.PebBaseAddress
)
642 peb
= pbi
.PebBaseAddress
;
647 le
= peb
->Ldr
->InMemoryOrderModuleList
.Flink
;
648 while (le
!= &peb
->Ldr
->InMemoryOrderModuleList
) {
649 LDR_DATA_TABLE_ENTRY
* entry
= CONTAINING_RECORD(le
, LDR_DATA_TABLE_ENTRY
, InMemoryOrderLinks
);
650 BOOL blacklist
= FALSE
;
652 if (entry
->FullDllName
.Length
>= mprus
.Length
) {
655 name
.Buffer
= &entry
->FullDllName
.Buffer
[(entry
->FullDllName
.Length
- mprus
.Length
) / sizeof(WCHAR
)];
656 name
.Length
= name
.MaximumLength
= mprus
.Length
;
658 blacklist
= FsRtlAreNamesEqual(&name
, &mprus
, TRUE
, NULL
);
661 if (!blacklist
&& entry
->FullDllName
.Length
>= cmdus
.Length
) {
664 name
.Buffer
= &entry
->FullDllName
.Buffer
[(entry
->FullDllName
.Length
- cmdus
.Length
) / sizeof(WCHAR
)];
665 name
.Length
= name
.MaximumLength
= cmdus
.Length
;
667 blacklist
= FsRtlAreNamesEqual(&name
, &cmdus
, TRUE
, NULL
);
670 if (!blacklist
&& entry
->FullDllName
.Length
>= fsutilus
.Length
) {
673 name
.Buffer
= &entry
->FullDllName
.Buffer
[(entry
->FullDllName
.Length
- fsutilus
.Length
) / sizeof(WCHAR
)];
674 name
.Length
= name
.MaximumLength
= fsutilus
.Length
;
676 blacklist
= FsRtlAreNamesEqual(&name
, &fsutilus
, TRUE
, NULL
);
683 frames
= ExAllocatePoolWithTag(PagedPool
, 256 * sizeof(void*), ALLOC_TAG
);
685 ERR("out of memory\n");
689 num_frames
= RtlWalkFrameChain(frames
, 256, 1);
691 for (i
= 0; i
< num_frames
; i
++) {
692 // entry->Reserved3[1] appears to be the image size
693 if (frames
[i
] >= entry
->DllBase
&& (ULONG_PTR
)frames
[i
] <= (ULONG_PTR
)entry
->DllBase
+ (ULONG_PTR
)entry
->Reserved3
[1]) {
709 _Dispatch_type_(IRP_MJ_QUERY_VOLUME_INFORMATION
)
710 _Function_class_(DRIVER_DISPATCH
)
711 static NTSTATUS
drv_query_volume_information(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
712 PIO_STACK_LOCATION IrpSp
;
714 ULONG BytesCopied
= 0;
715 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
718 FsRtlEnterFileSystem();
720 TRACE("query volume information\n");
721 top_level
= is_top_level(Irp
);
723 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
724 Status
= vol_query_volume_information(DeviceObject
, Irp
);
726 } else if (!Vcb
|| Vcb
->type
!= VCB_TYPE_FS
) {
727 Status
= STATUS_INVALID_PARAMETER
;
731 IrpSp
= IoGetCurrentIrpStackLocation(Irp
);
733 Status
= STATUS_NOT_IMPLEMENTED
;
735 switch (IrpSp
->Parameters
.QueryVolume
.FsInformationClass
) {
736 case FileFsAttributeInformation
:
738 FILE_FS_ATTRIBUTE_INFORMATION
* data
= Irp
->AssociatedIrp
.SystemBuffer
;
739 BOOL overflow
= FALSE
;
741 WCHAR
* fs_name
= (Irp
->RequestorMode
== UserMode
&& lie_about_fs_type()) ? L
"NTFS" : L
"Btrfs";
742 ULONG fs_name_len
= (ULONG
)wcslen(fs_name
) * sizeof(WCHAR
);
744 WCHAR
* fs_name
= L
"Btrfs";
745 ULONG fs_name_len
= 5 * sizeof(WCHAR
);
747 ULONG orig_fs_name_len
= fs_name_len
;
749 TRACE("FileFsAttributeInformation\n");
751 if (IrpSp
->Parameters
.QueryVolume
.Length
< sizeof(FILE_FS_ATTRIBUTE_INFORMATION
) - sizeof(WCHAR
) + fs_name_len
) {
752 if (IrpSp
->Parameters
.QueryVolume
.Length
> sizeof(FILE_FS_ATTRIBUTE_INFORMATION
) - sizeof(WCHAR
))
753 fs_name_len
= IrpSp
->Parameters
.QueryVolume
.Length
- sizeof(FILE_FS_ATTRIBUTE_INFORMATION
) + sizeof(WCHAR
);
760 data
->FileSystemAttributes
= FILE_CASE_PRESERVED_NAMES
| FILE_CASE_SENSITIVE_SEARCH
|
761 FILE_UNICODE_ON_DISK
| FILE_NAMED_STREAMS
| FILE_SUPPORTS_HARD_LINKS
| FILE_PERSISTENT_ACLS
|
762 FILE_SUPPORTS_REPARSE_POINTS
| FILE_SUPPORTS_SPARSE_FILES
| FILE_SUPPORTS_OBJECT_IDS
|
763 FILE_SUPPORTS_OPEN_BY_FILE_ID
| FILE_SUPPORTS_EXTENDED_ATTRIBUTES
| FILE_SUPPORTS_BLOCK_REFCOUNTING
;
765 data
->FileSystemAttributes
|= FILE_READ_ONLY_VOLUME
;
767 // should also be FILE_FILE_COMPRESSION when supported
768 data
->MaximumComponentNameLength
= 255; // FIXME - check
769 data
->FileSystemNameLength
= orig_fs_name_len
;
770 RtlCopyMemory(data
->FileSystemName
, fs_name
, fs_name_len
);
772 BytesCopied
= sizeof(FILE_FS_ATTRIBUTE_INFORMATION
) - sizeof(WCHAR
) + fs_name_len
;
773 Status
= overflow
? STATUS_BUFFER_OVERFLOW
: STATUS_SUCCESS
;
777 case FileFsDeviceInformation
:
779 FILE_FS_DEVICE_INFORMATION
* ffdi
= Irp
->AssociatedIrp
.SystemBuffer
;
781 TRACE("FileFsDeviceInformation\n");
783 ffdi
->DeviceType
= FILE_DEVICE_DISK
;
785 ExAcquireResourceSharedLite(&Vcb
->tree_lock
, TRUE
);
786 ffdi
->Characteristics
= Vcb
->Vpb
->RealDevice
->Characteristics
;
787 ExReleaseResourceLite(&Vcb
->tree_lock
);
790 ffdi
->Characteristics
|= FILE_READ_ONLY_DEVICE
;
792 ffdi
->Characteristics
&= ~FILE_READ_ONLY_DEVICE
;
794 BytesCopied
= sizeof(FILE_FS_DEVICE_INFORMATION
);
795 Status
= STATUS_SUCCESS
;
800 case FileFsFullSizeInformation
:
802 FILE_FS_FULL_SIZE_INFORMATION
* ffsi
= Irp
->AssociatedIrp
.SystemBuffer
;
804 TRACE("FileFsFullSizeInformation\n");
806 calculate_total_space(Vcb
, (UINT64
*)&ffsi
->TotalAllocationUnits
.QuadPart
, (UINT64
*)&ffsi
->ActualAvailableAllocationUnits
.QuadPart
);
807 ffsi
->CallerAvailableAllocationUnits
.QuadPart
= ffsi
->ActualAvailableAllocationUnits
.QuadPart
;
808 ffsi
->SectorsPerAllocationUnit
= 1;
809 ffsi
->BytesPerSector
= Vcb
->superblock
.sector_size
;
811 BytesCopied
= sizeof(FILE_FS_FULL_SIZE_INFORMATION
);
812 Status
= STATUS_SUCCESS
;
817 case FileFsObjectIdInformation
:
819 FILE_FS_OBJECTID_INFORMATION
* ffoi
= Irp
->AssociatedIrp
.SystemBuffer
;
821 TRACE("FileFsObjectIdInformation\n");
823 RtlCopyMemory(ffoi
->ObjectId
, &Vcb
->superblock
.uuid
.uuid
[0], sizeof(UCHAR
) * 16);
824 RtlZeroMemory(ffoi
->ExtendedInfo
, sizeof(ffoi
->ExtendedInfo
));
826 BytesCopied
= sizeof(FILE_FS_OBJECTID_INFORMATION
);
827 Status
= STATUS_SUCCESS
;
832 case FileFsSizeInformation
:
834 FILE_FS_SIZE_INFORMATION
* ffsi
= Irp
->AssociatedIrp
.SystemBuffer
;
836 TRACE("FileFsSizeInformation\n");
838 calculate_total_space(Vcb
, (UINT64
*)&ffsi
->TotalAllocationUnits
.QuadPart
, (UINT64
*)&ffsi
->AvailableAllocationUnits
.QuadPart
);
839 ffsi
->SectorsPerAllocationUnit
= 1;
840 ffsi
->BytesPerSector
= Vcb
->superblock
.sector_size
;
842 BytesCopied
= sizeof(FILE_FS_SIZE_INFORMATION
);
843 Status
= STATUS_SUCCESS
;
848 case FileFsVolumeInformation
:
850 FILE_FS_VOLUME_INFORMATION
* data
= Irp
->AssociatedIrp
.SystemBuffer
;
851 FILE_FS_VOLUME_INFORMATION ffvi
;
852 BOOL overflow
= FALSE
;
853 ULONG label_len
, orig_label_len
;
855 TRACE("FileFsVolumeInformation\n");
856 TRACE("max length = %u\n", IrpSp
->Parameters
.QueryVolume
.Length
);
858 ExAcquireResourceSharedLite(&Vcb
->tree_lock
, TRUE
);
860 Status
= RtlUTF8ToUnicodeN(NULL
, 0, &label_len
, Vcb
->superblock
.label
, (ULONG
)strlen(Vcb
->superblock
.label
));
861 if (!NT_SUCCESS(Status
)) {
862 ERR("RtlUTF8ToUnicodeN returned %08x\n", Status
);
863 ExReleaseResourceLite(&Vcb
->tree_lock
);
867 orig_label_len
= label_len
;
869 if (IrpSp
->Parameters
.QueryVolume
.Length
< sizeof(FILE_FS_VOLUME_INFORMATION
) - sizeof(WCHAR
) + label_len
) {
870 if (IrpSp
->Parameters
.QueryVolume
.Length
> sizeof(FILE_FS_VOLUME_INFORMATION
) - sizeof(WCHAR
))
871 label_len
= IrpSp
->Parameters
.QueryVolume
.Length
- sizeof(FILE_FS_VOLUME_INFORMATION
) + sizeof(WCHAR
);
878 TRACE("label_len = %u\n", label_len
);
880 ffvi
.VolumeCreationTime
.QuadPart
= 0; // FIXME
881 ffvi
.VolumeSerialNumber
= Vcb
->superblock
.uuid
.uuid
[12] << 24 | Vcb
->superblock
.uuid
.uuid
[13] << 16 | Vcb
->superblock
.uuid
.uuid
[14] << 8 | Vcb
->superblock
.uuid
.uuid
[15];
882 ffvi
.VolumeLabelLength
= orig_label_len
;
883 ffvi
.SupportsObjects
= FALSE
;
885 RtlCopyMemory(data
, &ffvi
, min(sizeof(FILE_FS_VOLUME_INFORMATION
) - sizeof(WCHAR
), IrpSp
->Parameters
.QueryVolume
.Length
));
890 Status
= RtlUTF8ToUnicodeN(&data
->VolumeLabel
[0], label_len
, &bytecount
, Vcb
->superblock
.label
, (ULONG
)strlen(Vcb
->superblock
.label
));
891 if (!NT_SUCCESS(Status
) && Status
!= STATUS_BUFFER_TOO_SMALL
) {
892 ERR("RtlUTF8ToUnicodeN returned %08x\n", Status
);
893 ExReleaseResourceLite(&Vcb
->tree_lock
);
897 TRACE("label = %.*S\n", label_len
/ sizeof(WCHAR
), data
->VolumeLabel
);
900 ExReleaseResourceLite(&Vcb
->tree_lock
);
902 BytesCopied
= sizeof(FILE_FS_VOLUME_INFORMATION
) - sizeof(WCHAR
) + label_len
;
903 Status
= overflow
? STATUS_BUFFER_OVERFLOW
: STATUS_SUCCESS
;
908 #ifdef _MSC_VER // not in mingw yet
909 case FileFsSectorSizeInformation
:
911 FILE_FS_SECTOR_SIZE_INFORMATION
* data
= Irp
->AssociatedIrp
.SystemBuffer
;
913 data
->LogicalBytesPerSector
= Vcb
->superblock
.sector_size
;
914 data
->PhysicalBytesPerSectorForAtomicity
= Vcb
->superblock
.sector_size
;
915 data
->PhysicalBytesPerSectorForPerformance
= Vcb
->superblock
.sector_size
;
916 data
->FileSystemEffectivePhysicalBytesPerSectorForAtomicity
= Vcb
->superblock
.sector_size
;
917 data
->ByteOffsetForSectorAlignment
= 0;
918 data
->ByteOffsetForPartitionAlignment
= 0;
920 data
->Flags
= SSINFO_FLAGS_ALIGNED_DEVICE
| SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE
;
922 if (Vcb
->trim
&& !Vcb
->options
.no_trim
)
923 data
->Flags
|= SSINFO_FLAGS_TRIM_ENABLED
;
925 BytesCopied
= sizeof(FILE_FS_SECTOR_SIZE_INFORMATION
);
930 #endif /* __REACTOS__ */
933 Status
= STATUS_INVALID_PARAMETER
;
934 WARN("unknown FsInformationClass %u\n", IrpSp
->Parameters
.QueryVolume
.FsInformationClass
);
938 if (!NT_SUCCESS(Status
) && Status
!= STATUS_BUFFER_OVERFLOW
)
939 Irp
->IoStatus
.Information
= 0;
941 Irp
->IoStatus
.Information
= BytesCopied
;
944 Irp
->IoStatus
.Status
= Status
;
946 IoCompleteRequest( Irp
, IO_DISK_INCREMENT
);
949 IoSetTopLevelIrp(NULL
);
951 TRACE("query volume information returning %08x\n", Status
);
953 FsRtlExitFileSystem();
958 _Function_class_(IO_COMPLETION_ROUTINE
)
960 static NTSTATUS NTAPI
read_completion(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
, _In_ PVOID conptr
) {
962 static NTSTATUS
read_completion(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
, _In_ PVOID conptr
) {
964 read_context
* context
= conptr
;
966 UNUSED(DeviceObject
);
968 context
->iosb
= Irp
->IoStatus
;
969 KeSetEvent(&context
->Event
, 0, FALSE
);
971 return STATUS_MORE_PROCESSING_REQUIRED
;
974 NTSTATUS
create_root(_In_
_Requires_exclusive_lock_held_(_Curr_
->tree_lock
) device_extension
* Vcb
, _In_ UINT64 id
,
975 _Out_ root
** rootptr
, _In_ BOOL no_tree
, _In_ UINT64 offset
, _In_opt_ PIRP Irp
) {
982 r
= ExAllocatePoolWithTag(PagedPool
, sizeof(root
), ALLOC_TAG
);
984 ERR("out of memory\n");
985 return STATUS_INSUFFICIENT_RESOURCES
;
988 r
->nonpaged
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(root_nonpaged
), ALLOC_TAG
);
990 ERR("out of memory\n");
992 return STATUS_INSUFFICIENT_RESOURCES
;
996 t
= ExAllocatePoolWithTag(PagedPool
, sizeof(tree
), ALLOC_TAG
);
998 ERR("out of memory\n");
999 ExFreePool(r
->nonpaged
);
1001 return STATUS_INSUFFICIENT_RESOURCES
;
1004 t
->is_unique
= TRUE
;
1005 t
->uniqueness_determined
= TRUE
;
1009 ri
= ExAllocatePoolWithTag(PagedPool
, sizeof(ROOT_ITEM
), ALLOC_TAG
);
1011 ERR("out of memory\n");
1016 ExFreePool(r
->nonpaged
);
1018 return STATUS_INSUFFICIENT_RESOURCES
;
1022 r
->treeholder
.address
= 0;
1023 r
->treeholder
.generation
= Vcb
->superblock
.generation
;
1024 r
->treeholder
.tree
= t
;
1027 r
->received
= FALSE
;
1031 RtlZeroMemory(&r
->root_item
, sizeof(ROOT_ITEM
));
1032 r
->root_item
.num_references
= 1;
1033 InitializeListHead(&r
->fcbs
);
1035 RtlCopyMemory(ri
, &r
->root_item
, sizeof(ROOT_ITEM
));
1037 // We ask here for a traverse_ptr to the item we're inserting, so we can
1038 // copy some of the tree's variables
1040 Status
= insert_tree_item(Vcb
, Vcb
->root_root
, id
, TYPE_ROOT_ITEM
, offset
, ri
, sizeof(ROOT_ITEM
), &tp
, Irp
);
1041 if (!NT_SUCCESS(Status
)) {
1042 ERR("insert_tree_item returned %08x\n", Status
);
1048 ExFreePool(r
->nonpaged
);
1053 ExInitializeResourceLite(&r
->nonpaged
->load_tree_lock
);
1055 InsertTailList(&Vcb
->roots
, &r
->list_entry
);
1058 RtlZeroMemory(&t
->header
, sizeof(tree_header
));
1059 t
->header
.fs_uuid
= tp
.tree
->header
.fs_uuid
;
1060 t
->header
.address
= 0;
1061 t
->header
.flags
= HEADER_FLAG_MIXED_BACKREF
| 1; // 1 == "written"? Why does the Linux driver record this?
1062 t
->header
.chunk_tree_uuid
= tp
.tree
->header
.chunk_tree_uuid
;
1063 t
->header
.generation
= Vcb
->superblock
.generation
;
1064 t
->header
.tree_id
= id
;
1065 t
->header
.num_items
= 0;
1066 t
->header
.level
= 0;
1068 t
->has_address
= FALSE
;
1075 InitializeListHead(&t
->itemlist
);
1078 t
->has_new_address
= FALSE
;
1079 t
->updated_extents
= FALSE
;
1081 InsertTailList(&Vcb
->trees
, &t
->list_entry
);
1082 t
->list_entry_hash
.Flink
= NULL
;
1085 Vcb
->need_write
= TRUE
;
1090 return STATUS_SUCCESS
;
1093 static NTSTATUS
set_label(_In_ device_extension
* Vcb
, _In_ FILE_FS_LABEL_INFORMATION
* ffli
) {
1098 TRACE("label = %.*S\n", ffli
->VolumeLabelLength
/ sizeof(WCHAR
), ffli
->VolumeLabel
);
1100 vollen
= ffli
->VolumeLabelLength
;
1102 for (i
= 0; i
< ffli
->VolumeLabelLength
/ sizeof(WCHAR
); i
++) {
1103 if (ffli
->VolumeLabel
[i
] == 0) {
1104 vollen
= i
* sizeof(WCHAR
);
1106 } else if (ffli
->VolumeLabel
[i
] == '/' || ffli
->VolumeLabel
[i
] == '\\') {
1107 Status
= STATUS_INVALID_VOLUME_LABEL
;
1115 Status
= RtlUnicodeToUTF8N(NULL
, 0, &utf8len
, ffli
->VolumeLabel
, vollen
);
1116 if (!NT_SUCCESS(Status
))
1119 if (utf8len
> MAX_LABEL_SIZE
) {
1120 Status
= STATUS_INVALID_VOLUME_LABEL
;
1125 ExAcquireResourceExclusiveLite(&Vcb
->tree_lock
, TRUE
);
1128 Status
= RtlUnicodeToUTF8N((PCHAR
)&Vcb
->superblock
.label
, MAX_LABEL_SIZE
, &utf8len
, ffli
->VolumeLabel
, vollen
);
1129 if (!NT_SUCCESS(Status
))
1132 Status
= STATUS_SUCCESS
;
1134 if (utf8len
< MAX_LABEL_SIZE
)
1135 RtlZeroMemory(Vcb
->superblock
.label
+ utf8len
, MAX_LABEL_SIZE
- utf8len
);
1137 Vcb
->need_write
= TRUE
;
1140 ExReleaseResourceLite(&Vcb
->tree_lock
);
1143 TRACE("returning %08x\n", Status
);
1148 _Dispatch_type_(IRP_MJ_SET_VOLUME_INFORMATION
)
1149 _Function_class_(DRIVER_DISPATCH
)
1150 static NTSTATUS
drv_set_volume_information(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
1151 PIO_STACK_LOCATION IrpSp
= IoGetCurrentIrpStackLocation(Irp
);
1152 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
1156 FsRtlEnterFileSystem();
1158 TRACE("set volume information\n");
1160 top_level
= is_top_level(Irp
);
1162 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
1163 Status
= vol_set_volume_information(DeviceObject
, Irp
);
1165 } else if (!Vcb
|| Vcb
->type
!= VCB_TYPE_FS
) {
1166 Status
= STATUS_INVALID_PARAMETER
;
1170 Status
= STATUS_NOT_IMPLEMENTED
;
1172 if (Vcb
->readonly
) {
1173 Status
= STATUS_MEDIA_WRITE_PROTECTED
;
1177 if (Vcb
->removing
|| Vcb
->locked
) {
1178 Status
= STATUS_ACCESS_DENIED
;
1182 switch (IrpSp
->Parameters
.SetVolume
.FsInformationClass
) {
1183 case FileFsControlInformation
:
1184 FIXME("STUB: FileFsControlInformation\n");
1187 case FileFsLabelInformation
:
1188 TRACE("FileFsLabelInformation\n");
1190 Status
= set_label(Vcb
, Irp
->AssociatedIrp
.SystemBuffer
);
1193 case FileFsObjectIdInformation
:
1194 FIXME("STUB: FileFsObjectIdInformation\n");
1198 WARN("Unrecognized FsInformationClass 0x%x\n", IrpSp
->Parameters
.SetVolume
.FsInformationClass
);
1203 Irp
->IoStatus
.Status
= Status
;
1204 Irp
->IoStatus
.Information
= 0;
1206 TRACE("returning %08x\n", Status
);
1208 IoCompleteRequest( Irp
, IO_NO_INCREMENT
);
1211 IoSetTopLevelIrp(NULL
);
1213 FsRtlExitFileSystem();
1218 static WCHAR
* file_desc_fcb(_In_ fcb
* fcb
) {
1224 if (fcb
->debug_desc
)
1225 return fcb
->debug_desc
;
1227 if (fcb
== fcb
->Vcb
->volume_fcb
)
1228 return L
"volume FCB";
1230 fcb
->debug_desc
= ExAllocatePoolWithTag(PagedPool
, 60 * sizeof(WCHAR
), ALLOC_TAG
);
1231 if (!fcb
->debug_desc
)
1232 return L
"(memory error)";
1234 // I know this is pretty hackish...
1235 // GCC doesn't like %llx in sprintf, and MSVC won't let us use swprintf
1236 // without the CRT, which breaks drivers.
1238 sprintf(s
, "subvol %x, inode %x", (UINT32
)fcb
->subvol
->id
, (UINT32
)fcb
->inode
);
1241 as
.Length
= as
.MaximumLength
= (USHORT
)strlen(s
);
1243 us
.Buffer
= fcb
->debug_desc
;
1244 us
.MaximumLength
= 60 * sizeof(WCHAR
);
1247 Status
= RtlAnsiStringToUnicodeString(&us
, &as
, FALSE
);
1248 if (!NT_SUCCESS(Status
))
1249 return L
"(RtlAnsiStringToUnicodeString error)";
1251 us
.Buffer
[us
.Length
/ sizeof(WCHAR
)] = 0;
1253 return fcb
->debug_desc
;
1256 WCHAR
* file_desc_fileref(_In_ file_ref
* fileref
) {
1261 if (fileref
->debug_desc
)
1262 return fileref
->debug_desc
;
1264 fn
.Length
= fn
.MaximumLength
= 0;
1265 Status
= fileref_get_filename(fileref
, &fn
, NULL
, &reqlen
);
1266 if (Status
!= STATUS_BUFFER_OVERFLOW
)
1269 if (reqlen
> 0xffff - sizeof(WCHAR
))
1270 return L
"(too long)";
1272 fileref
->debug_desc
= ExAllocatePoolWithTag(PagedPool
, reqlen
+ sizeof(WCHAR
), ALLOC_TAG
);
1273 if (!fileref
->debug_desc
)
1274 return L
"(memory error)";
1276 fn
.Buffer
= fileref
->debug_desc
;
1278 fn
.MaximumLength
= (USHORT
)(reqlen
+ sizeof(WCHAR
));
1280 Status
= fileref_get_filename(fileref
, &fn
, NULL
, &reqlen
);
1281 if (!NT_SUCCESS(Status
)) {
1282 ExFreePool(fileref
->debug_desc
);
1283 fileref
->debug_desc
= NULL
;
1287 fileref
->debug_desc
[fn
.Length
/ sizeof(WCHAR
)] = 0;
1289 return fileref
->debug_desc
;
1293 WCHAR
* file_desc(_In_ PFILE_OBJECT FileObject
) {
1294 fcb
* fcb
= FileObject
->FsContext
;
1295 ccb
* ccb
= FileObject
->FsContext2
;
1296 file_ref
* fileref
= ccb
? ccb
->fileref
: NULL
;
1299 return file_desc_fileref(fileref
);
1301 return file_desc_fcb(fcb
);
1304 void send_notification_fileref(_In_ file_ref
* fileref
, _In_ ULONG filter_match
, _In_ ULONG action
, _In_opt_ PUNICODE_STRING stream
) {
1309 fcb
* fcb
= fileref
->fcb
;
1311 fn
.Length
= fn
.MaximumLength
= 0;
1312 Status
= fileref_get_filename(fileref
, &fn
, NULL
, &reqlen
);
1313 if (Status
!= STATUS_BUFFER_OVERFLOW
) {
1314 ERR("fileref_get_filename returned %08x\n", Status
);
1318 if (reqlen
> 0xffff) {
1319 WARN("reqlen was too long for FsRtlNotifyFilterReportChange\n");
1323 fn
.Buffer
= ExAllocatePoolWithTag(PagedPool
, reqlen
, ALLOC_TAG
);
1325 ERR("out of memory\n");
1329 fn
.MaximumLength
= (USHORT
)reqlen
;
1332 Status
= fileref_get_filename(fileref
, &fn
, &name_offset
, &reqlen
);
1333 if (!NT_SUCCESS(Status
)) {
1334 ERR("fileref_get_filename returned %08x\n", Status
);
1335 ExFreePool(fn
.Buffer
);
1339 FsRtlNotifyFilterReportChange(fcb
->Vcb
->NotifySync
, &fcb
->Vcb
->DirNotifyList
, (PSTRING
)&fn
, name_offset
,
1340 (PSTRING
)stream
, NULL
, filter_match
, action
, NULL
, NULL
);
1341 ExFreePool(fn
.Buffer
);
1344 void send_notification_fcb(_In_ file_ref
* fileref
, _In_ ULONG filter_match
, _In_ ULONG action
, _In_opt_ PUNICODE_STRING stream
) {
1345 fcb
* fcb
= fileref
->fcb
;
1349 // no point looking for hardlinks if st_nlink == 1
1350 if (fileref
->fcb
->inode_item
.st_nlink
== 1) {
1351 send_notification_fileref(fileref
, filter_match
, action
, stream
);
1355 acquire_fcb_lock_exclusive(fcb
->Vcb
);
1357 le
= fcb
->hardlinks
.Flink
;
1358 while (le
!= &fcb
->hardlinks
) {
1359 hardlink
* hl
= CONTAINING_RECORD(le
, hardlink
, list_entry
);
1362 Status
= open_fileref_by_inode(fcb
->Vcb
, fcb
->subvol
, hl
->parent
, &parfr
, NULL
);
1364 if (!NT_SUCCESS(Status
))
1365 ERR("open_fileref_by_inode returned %08x\n", Status
);
1366 else if (!parfr
->deleted
) {
1370 fn
.Length
= fn
.MaximumLength
= 0;
1371 Status
= fileref_get_filename(parfr
, &fn
, NULL
, &pathlen
);
1372 if (Status
!= STATUS_BUFFER_OVERFLOW
) {
1373 ERR("fileref_get_filename returned %08x\n", Status
);
1374 free_fileref(fcb
->Vcb
, parfr
);
1378 if (parfr
!= fcb
->Vcb
->root_fileref
)
1379 pathlen
+= sizeof(WCHAR
);
1381 if (pathlen
+ hl
->name
.Length
> 0xffff) {
1382 WARN("pathlen + hl->name.Length was too long for FsRtlNotifyFilterReportChange\n");
1383 free_fileref(fcb
->Vcb
, parfr
);
1387 fn
.MaximumLength
= (USHORT
)(pathlen
+ hl
->name
.Length
);
1388 fn
.Buffer
= ExAllocatePoolWithTag(PagedPool
, fn
.MaximumLength
, ALLOC_TAG
);
1390 ERR("out of memory\n");
1391 free_fileref(fcb
->Vcb
, parfr
);
1395 Status
= fileref_get_filename(parfr
, &fn
, NULL
, NULL
);
1396 if (!NT_SUCCESS(Status
)) {
1397 ERR("fileref_get_filename returned %08x\n", Status
);
1398 free_fileref(fcb
->Vcb
, parfr
);
1399 ExFreePool(fn
.Buffer
);
1403 if (parfr
!= fcb
->Vcb
->root_fileref
) {
1404 fn
.Buffer
[(pathlen
/ sizeof(WCHAR
)) - 1] = '\\';
1405 fn
.Length
+= sizeof(WCHAR
);
1408 RtlCopyMemory(&fn
.Buffer
[pathlen
/ sizeof(WCHAR
)], hl
->name
.Buffer
, hl
->name
.Length
);
1409 fn
.Length
+= hl
->name
.Length
;
1411 FsRtlNotifyFilterReportChange(fcb
->Vcb
->NotifySync
, &fcb
->Vcb
->DirNotifyList
, (PSTRING
)&fn
, (USHORT
)pathlen
,
1412 (PSTRING
)stream
, NULL
, filter_match
, action
, NULL
, NULL
);
1414 ExFreePool(fn
.Buffer
);
1416 free_fileref(fcb
->Vcb
, parfr
);
1422 release_fcb_lock(fcb
->Vcb
);
1425 void mark_fcb_dirty(_In_ fcb
* fcb
) {
1427 #ifdef DEBUG_FCB_REFCOUNTS
1432 #ifdef DEBUG_FCB_REFCOUNTS
1433 rc
= InterlockedIncrement(&fcb
->refcount
);
1434 WARN("fcb %p: refcount now %i\n", fcb
, rc
);
1436 InterlockedIncrement(&fcb
->refcount
);
1439 ExAcquireResourceExclusiveLite(&fcb
->Vcb
->dirty_fcbs_lock
, TRUE
);
1440 InsertTailList(&fcb
->Vcb
->dirty_fcbs
, &fcb
->list_entry_dirty
);
1441 ExReleaseResourceLite(&fcb
->Vcb
->dirty_fcbs_lock
);
1444 fcb
->Vcb
->need_write
= TRUE
;
1447 void mark_fileref_dirty(_In_ file_ref
* fileref
) {
1448 if (!fileref
->dirty
) {
1449 fileref
->dirty
= TRUE
;
1450 increase_fileref_refcount(fileref
);
1452 ExAcquireResourceExclusiveLite(&fileref
->fcb
->Vcb
->dirty_filerefs_lock
, TRUE
);
1453 InsertTailList(&fileref
->fcb
->Vcb
->dirty_filerefs
, &fileref
->list_entry_dirty
);
1454 ExReleaseResourceLite(&fileref
->fcb
->Vcb
->dirty_filerefs_lock
);
1457 fileref
->fcb
->Vcb
->need_write
= TRUE
;
1460 #ifdef DEBUG_FCB_REFCOUNTS
1461 void _free_fcb(_Requires_exclusive_lock_held_(_Curr_
->fcb_lock
) _In_ device_extension
* Vcb
, _Inout_ fcb
* fcb
, _In_
const char* func
) {
1463 void free_fcb(_Requires_exclusive_lock_held_(_Curr_
->fcb_lock
) _In_ device_extension
* Vcb
, _Inout_ fcb
* fcb
) {
1467 rc
= InterlockedDecrement(&fcb
->refcount
);
1469 #ifdef DEBUG_FCB_REFCOUNTS
1470 #ifdef DEBUG_LONG_MESSAGES
1471 ERR("fcb %p: refcount now %i (subvol %llx, inode %llx)\n", fcb
, rc
, fcb
->subvol
? fcb
->subvol
->id
: 0, fcb
->inode
);
1473 ERR("fcb %p: refcount now %i (subvol %llx, inode %llx)\n", fcb
, rc
, fcb
->subvol
? fcb
->subvol
->id
: 0, fcb
->inode
);
1480 if (fcb
->list_entry
.Flink
)
1481 RemoveEntryList(&fcb
->list_entry
);
1483 if (fcb
->list_entry_all
.Flink
)
1484 RemoveEntryList(&fcb
->list_entry_all
);
1486 ExDeleteResourceLite(&fcb
->nonpaged
->resource
);
1487 ExDeleteResourceLite(&fcb
->nonpaged
->paging_resource
);
1488 ExDeleteResourceLite(&fcb
->nonpaged
->dir_children_lock
);
1490 ExFreeToNPagedLookasideList(&Vcb
->fcb_np_lookaside
, fcb
->nonpaged
);
1493 ExFreePool(fcb
->sd
);
1495 if (fcb
->adsxattr
.Buffer
)
1496 ExFreePool(fcb
->adsxattr
.Buffer
);
1498 if (fcb
->reparse_xattr
.Buffer
)
1499 ExFreePool(fcb
->reparse_xattr
.Buffer
);
1501 if (fcb
->ea_xattr
.Buffer
)
1502 ExFreePool(fcb
->ea_xattr
.Buffer
);
1504 if (fcb
->adsdata
.Buffer
)
1505 ExFreePool(fcb
->adsdata
.Buffer
);
1507 if (fcb
->debug_desc
)
1508 ExFreePool(fcb
->debug_desc
);
1510 while (!IsListEmpty(&fcb
->extents
)) {
1511 LIST_ENTRY
* le
= RemoveHeadList(&fcb
->extents
);
1512 extent
* ext
= CONTAINING_RECORD(le
, extent
, list_entry
);
1515 ExFreePool(ext
->csum
);
1520 while (!IsListEmpty(&fcb
->hardlinks
)) {
1521 LIST_ENTRY
* le
= RemoveHeadList(&fcb
->hardlinks
);
1522 hardlink
* hl
= CONTAINING_RECORD(le
, hardlink
, list_entry
);
1524 if (hl
->name
.Buffer
)
1525 ExFreePool(hl
->name
.Buffer
);
1527 if (hl
->utf8
.Buffer
)
1528 ExFreePool(hl
->utf8
.Buffer
);
1533 while (!IsListEmpty(&fcb
->xattrs
)) {
1534 xattr
* xa
= CONTAINING_RECORD(RemoveHeadList(&fcb
->xattrs
), xattr
, list_entry
);
1539 while (!IsListEmpty(&fcb
->dir_children_index
)) {
1540 LIST_ENTRY
* le
= RemoveHeadList(&fcb
->dir_children_index
);
1541 dir_child
* dc
= CONTAINING_RECORD(le
, dir_child
, list_entry_index
);
1543 ExFreePool(dc
->utf8
.Buffer
);
1544 ExFreePool(dc
->name
.Buffer
);
1545 ExFreePool(dc
->name_uc
.Buffer
);
1550 ExFreePool(fcb
->hash_ptrs
);
1552 if (fcb
->hash_ptrs_uc
)
1553 ExFreePool(fcb
->hash_ptrs_uc
);
1555 FsRtlUninitializeFileLock(&fcb
->lock
);
1557 if (fcb
->pool_type
== NonPagedPool
)
1560 ExFreeToPagedLookasideList(&Vcb
->fcb_lookaside
, fcb
);
1562 #ifdef DEBUG_FCB_REFCOUNTS
1563 #ifdef DEBUG_LONG_MESSAGES
1564 _debug_message(func
, file
, line
, "freeing fcb %p\n", fcb
);
1566 _debug_message(func
, "freeing fcb %p\n", fcb
);
1571 void free_fileref(_Requires_exclusive_lock_held_(_Curr_
->fcb_lock
) _In_ device_extension
* Vcb
, _Inout_ file_ref
* fr
) {
1574 rc
= InterlockedDecrement(&fr
->refcount
);
1576 #ifdef DEBUG_FCB_REFCOUNTS
1577 ERR("fileref %p: refcount now %i\n", fr
, rc
);
1582 ERR("fileref %p: refcount now %i\n", fr
, rc
);
1591 ExAcquireResourceExclusiveLite(&fr
->parent
->nonpaged
->children_lock
, TRUE
);
1593 // FIXME - do we need a file_ref lock?
1595 // FIXME - do delete if needed
1598 ExFreePool(fr
->debug_desc
);
1600 ExDeleteResourceLite(&fr
->nonpaged
->children_lock
);
1601 ExDeleteResourceLite(&fr
->nonpaged
->fileref_lock
);
1603 ExFreeToNPagedLookasideList(&Vcb
->fileref_np_lookaside
, fr
->nonpaged
);
1605 // FIXME - throw error if children not empty
1607 if (fr
->fcb
->fileref
== fr
)
1608 fr
->fcb
->fileref
= NULL
;
1612 fr
->dc
->size
= fr
->fcb
->adsdata
.Length
;
1614 fr
->dc
->fileref
= NULL
;
1617 if (fr
->list_entry
.Flink
)
1618 RemoveEntryList(&fr
->list_entry
);
1621 ExReleaseResourceLite(&fr
->parent
->nonpaged
->children_lock
);
1622 free_fileref(Vcb
, fr
->parent
);
1625 free_fcb(Vcb
, fr
->fcb
);
1627 ExFreeToPagedLookasideList(&Vcb
->fileref_lookaside
, fr
);
1630 static NTSTATUS
close_file(_In_ PFILE_OBJECT FileObject
, _In_ PIRP Irp
) {
1633 file_ref
* fileref
= NULL
;
1635 device_extension
* Vcb
;
1639 TRACE("FileObject = %p\n", FileObject
);
1641 fcb
= FileObject
->FsContext
;
1643 TRACE("FCB was NULL, returning success\n");
1644 return STATUS_SUCCESS
;
1647 open_files
= InterlockedDecrement(&fcb
->Vcb
->open_files
);
1649 ccb
= FileObject
->FsContext2
;
1651 TRACE("close called for %S (fcb == %p)\n", file_desc(FileObject
), fcb
);
1653 // FIXME - make sure notification gets sent if file is being deleted
1656 if (ccb
->query_string
.Buffer
)
1657 RtlFreeUnicodeString(&ccb
->query_string
);
1659 if (ccb
->filename
.Buffer
)
1660 ExFreePool(ccb
->filename
.Buffer
);
1662 // FIXME - use refcounts for fileref
1663 fileref
= ccb
->fileref
;
1665 if (fcb
->Vcb
->running_sends
> 0) {
1666 BOOL send_cancelled
= FALSE
;
1668 ExAcquireResourceExclusiveLite(&fcb
->Vcb
->send_load_lock
, TRUE
);
1671 ccb
->send
->cancelling
= TRUE
;
1672 send_cancelled
= TRUE
;
1673 KeSetEvent(&ccb
->send
->cleared_event
, 0, FALSE
);
1676 ExReleaseResourceLite(&fcb
->Vcb
->send_load_lock
);
1678 if (send_cancelled
) {
1680 ExAcquireResourceExclusiveLite(&fcb
->Vcb
->send_load_lock
, TRUE
);
1681 ExReleaseResourceLite(&fcb
->Vcb
->send_load_lock
);
1689 CcUninitializeCacheMap(FileObject
, NULL
, NULL
);
1691 if (open_files
== 0 && fcb
->Vcb
->removing
) {
1692 uninit(fcb
->Vcb
, FALSE
);
1693 return STATUS_SUCCESS
;
1696 if (!(fcb
->Vcb
->Vpb
->Flags
& VPB_MOUNTED
))
1697 return STATUS_SUCCESS
;
1701 acquire_fcb_lock_exclusive(Vcb
);
1704 free_fileref(fcb
->Vcb
, fileref
);
1708 release_fcb_lock(Vcb
);
1710 return STATUS_SUCCESS
;
1713 void uninit(_In_ device_extension
* Vcb
, _In_ BOOL flush
) {
1719 if (!Vcb
->removing
) {
1720 ExAcquireResourceExclusiveLite(&Vcb
->tree_lock
, TRUE
);
1721 Vcb
->removing
= TRUE
;
1722 ExReleaseResourceLite(&Vcb
->tree_lock
);
1725 RemoveEntryList(&Vcb
->list_entry
);
1727 if (Vcb
->balance
.thread
) {
1728 Vcb
->balance
.paused
= FALSE
;
1729 Vcb
->balance
.stopping
= TRUE
;
1730 KeSetEvent(&Vcb
->balance
.event
, 0, FALSE
);
1731 KeWaitForSingleObject(&Vcb
->balance
.finished
, Executive
, KernelMode
, FALSE
, NULL
);
1734 if (Vcb
->scrub
.thread
) {
1735 Vcb
->scrub
.paused
= FALSE
;
1736 Vcb
->scrub
.stopping
= TRUE
;
1737 KeSetEvent(&Vcb
->scrub
.event
, 0, FALSE
);
1738 KeWaitForSingleObject(&Vcb
->scrub
.finished
, Executive
, KernelMode
, FALSE
, NULL
);
1741 if (Vcb
->running_sends
!= 0) {
1742 BOOL send_cancelled
= FALSE
;
1744 ExAcquireResourceExclusiveLite(&Vcb
->send_load_lock
, TRUE
);
1746 le
= Vcb
->send_ops
.Flink
;
1747 while (le
!= &Vcb
->send_ops
) {
1748 send_info
* send
= CONTAINING_RECORD(le
, send_info
, list_entry
);
1750 if (!send
->cancelling
) {
1751 send
->cancelling
= TRUE
;
1752 send_cancelled
= TRUE
;
1754 KeSetEvent(&send
->cleared_event
, 0, FALSE
);
1760 ExReleaseResourceLite(&Vcb
->send_load_lock
);
1762 if (send_cancelled
) {
1763 while (Vcb
->running_sends
!= 0) {
1764 ExAcquireResourceExclusiveLite(&Vcb
->send_load_lock
, TRUE
);
1765 ExReleaseResourceLite(&Vcb
->send_load_lock
);
1770 Status
= registry_mark_volume_unmounted(&Vcb
->superblock
.uuid
);
1771 if (!NT_SUCCESS(Status
) && Status
!= STATUS_TOO_LATE
)
1772 WARN("registry_mark_volume_unmounted returned %08x\n", Status
);
1775 ExAcquireResourceExclusiveLite(&Vcb
->tree_lock
, TRUE
);
1777 if (Vcb
->need_write
&& !Vcb
->readonly
) {
1778 Status
= do_write(Vcb
, NULL
);
1779 if (!NT_SUCCESS(Status
))
1780 ERR("do_write returned %08x\n", Status
);
1785 ExReleaseResourceLite(&Vcb
->tree_lock
);
1788 for (i
= 0; i
< Vcb
->calcthreads
.num_threads
; i
++) {
1789 Vcb
->calcthreads
.threads
[i
].quit
= TRUE
;
1792 KeSetEvent(&Vcb
->calcthreads
.event
, 0, FALSE
);
1794 for (i
= 0; i
< Vcb
->calcthreads
.num_threads
; i
++) {
1795 KeWaitForSingleObject(&Vcb
->calcthreads
.threads
[i
].finished
, Executive
, KernelMode
, FALSE
, NULL
);
1797 ZwClose(Vcb
->calcthreads
.threads
[i
].handle
);
1800 ExDeleteResourceLite(&Vcb
->calcthreads
.lock
);
1801 ExFreePool(Vcb
->calcthreads
.threads
);
1804 KeSetTimer(&Vcb
->flush_thread_timer
, time
, NULL
); // trigger the timer early
1805 KeWaitForSingleObject(&Vcb
->flush_thread_finished
, Executive
, KernelMode
, FALSE
, NULL
);
1807 acquire_fcb_lock_exclusive(Vcb
);
1808 free_fcb(Vcb
, Vcb
->volume_fcb
);
1809 free_fcb(Vcb
, Vcb
->dummy_fcb
);
1810 release_fcb_lock(Vcb
);
1813 ObDereferenceObject(Vcb
->root_file
);
1815 le
= Vcb
->chunks
.Flink
;
1816 while (le
!= &Vcb
->chunks
) {
1817 chunk
* c
= CONTAINING_RECORD(le
, chunk
, list_entry
);
1820 acquire_fcb_lock_exclusive(Vcb
);
1821 free_fcb(Vcb
, c
->cache
);
1822 release_fcb_lock(Vcb
);
1829 while (!IsListEmpty(&Vcb
->roots
)) {
1830 root
* r
= CONTAINING_RECORD(RemoveHeadList(&Vcb
->roots
), root
, list_entry
);
1832 ExDeleteResourceLite(&r
->nonpaged
->load_tree_lock
);
1833 ExFreePool(r
->nonpaged
);
1837 while (!IsListEmpty(&Vcb
->chunks
)) {
1838 chunk
* c
= CONTAINING_RECORD(RemoveHeadList(&Vcb
->chunks
), chunk
, list_entry
);
1840 while (!IsListEmpty(&c
->space
)) {
1841 LIST_ENTRY
* le2
= RemoveHeadList(&c
->space
);
1842 space
* s
= CONTAINING_RECORD(le2
, space
, list_entry
);
1847 while (!IsListEmpty(&c
->deleting
)) {
1848 LIST_ENTRY
* le2
= RemoveHeadList(&c
->deleting
);
1849 space
* s
= CONTAINING_RECORD(le2
, space
, list_entry
);
1855 ExFreePool(c
->devices
);
1858 acquire_fcb_lock_exclusive(Vcb
);
1859 free_fcb(Vcb
, c
->cache
);
1860 release_fcb_lock(Vcb
);
1863 ExDeleteResourceLite(&c
->range_locks_lock
);
1864 ExDeleteResourceLite(&c
->partial_stripes_lock
);
1865 ExDeleteResourceLite(&c
->lock
);
1866 ExDeleteResourceLite(&c
->changed_extents_lock
);
1868 ExFreePool(c
->chunk_item
);
1872 // FIXME - free any open fcbs?
1874 while (!IsListEmpty(&Vcb
->devices
)) {
1875 device
* dev
= CONTAINING_RECORD(RemoveHeadList(&Vcb
->devices
), device
, list_entry
);
1877 while (!IsListEmpty(&dev
->space
)) {
1878 LIST_ENTRY
* le2
= RemoveHeadList(&dev
->space
);
1879 space
* s
= CONTAINING_RECORD(le2
, space
, list_entry
);
1887 ExAcquireResourceExclusiveLite(&Vcb
->scrub
.stats_lock
, TRUE
);
1888 while (!IsListEmpty(&Vcb
->scrub
.errors
)) {
1889 scrub_error
* err
= CONTAINING_RECORD(RemoveHeadList(&Vcb
->scrub
.errors
), scrub_error
, list_entry
);
1893 ExReleaseResourceLite(&Vcb
->scrub
.stats_lock
);
1895 ExDeleteResourceLite(&Vcb
->fcb_lock
);
1896 ExDeleteResourceLite(&Vcb
->load_lock
);
1897 ExDeleteResourceLite(&Vcb
->tree_lock
);
1898 ExDeleteResourceLite(&Vcb
->chunk_lock
);
1899 ExDeleteResourceLite(&Vcb
->dirty_fcbs_lock
);
1900 ExDeleteResourceLite(&Vcb
->dirty_filerefs_lock
);
1901 ExDeleteResourceLite(&Vcb
->dirty_subvols_lock
);
1902 ExDeleteResourceLite(&Vcb
->scrub
.stats_lock
);
1903 ExDeleteResourceLite(&Vcb
->send_load_lock
);
1905 ExDeletePagedLookasideList(&Vcb
->tree_data_lookaside
);
1906 ExDeletePagedLookasideList(&Vcb
->traverse_ptr_lookaside
);
1907 ExDeletePagedLookasideList(&Vcb
->batch_item_lookaside
);
1908 ExDeletePagedLookasideList(&Vcb
->fileref_lookaside
);
1909 ExDeletePagedLookasideList(&Vcb
->fcb_lookaside
);
1910 ExDeletePagedLookasideList(&Vcb
->name_bit_lookaside
);
1911 ExDeleteNPagedLookasideList(&Vcb
->range_lock_lookaside
);
1912 ExDeleteNPagedLookasideList(&Vcb
->fileref_np_lookaside
);
1913 ExDeleteNPagedLookasideList(&Vcb
->fcb_np_lookaside
);
1915 ZwClose(Vcb
->flush_thread_handle
);
1918 NTSTATUS
delete_fileref(_In_ file_ref
* fileref
, _In_opt_ PFILE_OBJECT FileObject
, _In_opt_ PIRP Irp
, _In_ LIST_ENTRY
* rollback
) {
1919 LARGE_INTEGER newlength
, time
;
1924 KeQuerySystemTime(&time
);
1925 win_time_to_unix(time
, &now
);
1927 ExAcquireResourceExclusiveLite(fileref
->fcb
->Header
.Resource
, TRUE
);
1929 if (fileref
->deleted
) {
1930 ExReleaseResourceLite(fileref
->fcb
->Header
.Resource
);
1931 return STATUS_SUCCESS
;
1934 if (fileref
->fcb
->subvol
->send_ops
> 0) {
1935 ExReleaseResourceLite(fileref
->fcb
->Header
.Resource
);
1936 return STATUS_ACCESS_DENIED
;
1939 fileref
->deleted
= TRUE
;
1940 mark_fileref_dirty(fileref
);
1942 // delete INODE_ITEM (0x1)
1944 TRACE("nlink = %u\n", fileref
->fcb
->inode_item
.st_nlink
);
1946 if (!fileref
->fcb
->ads
) {
1947 if (fileref
->parent
->fcb
->subvol
== fileref
->fcb
->subvol
) {
1950 mark_fcb_dirty(fileref
->fcb
);
1952 fileref
->fcb
->inode_item_changed
= TRUE
;
1954 if (fileref
->fcb
->inode_item
.st_nlink
> 1) {
1955 fileref
->fcb
->inode_item
.st_nlink
--;
1956 fileref
->fcb
->inode_item
.transid
= fileref
->fcb
->Vcb
->superblock
.generation
;
1957 fileref
->fcb
->inode_item
.sequence
++;
1958 fileref
->fcb
->inode_item
.st_ctime
= now
;
1962 if (fileref
->fcb
->type
!= BTRFS_TYPE_DIRECTORY
&& fileref
->fcb
->inode_item
.st_size
> 0) {
1963 Status
= excise_extents(fileref
->fcb
->Vcb
, fileref
->fcb
, 0, sector_align(fileref
->fcb
->inode_item
.st_size
, fileref
->fcb
->Vcb
->superblock
.sector_size
), Irp
, rollback
);
1964 if (!NT_SUCCESS(Status
)) {
1965 ERR("excise_extents returned %08x\n", Status
);
1966 ExReleaseResourceLite(fileref
->fcb
->Header
.Resource
);
1971 fileref
->fcb
->Header
.AllocationSize
.QuadPart
= 0;
1972 fileref
->fcb
->Header
.FileSize
.QuadPart
= 0;
1973 fileref
->fcb
->Header
.ValidDataLength
.QuadPart
= 0;
1978 ccfs
.AllocationSize
= fileref
->fcb
->Header
.AllocationSize
;
1979 ccfs
.FileSize
= fileref
->fcb
->Header
.FileSize
;
1980 ccfs
.ValidDataLength
= fileref
->fcb
->Header
.ValidDataLength
;
1982 Status
= STATUS_SUCCESS
;
1985 CcSetFileSizes(FileObject
, &ccfs
);
1986 } _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER
) {
1987 Status
= _SEH2_GetExceptionCode();
1990 if (!NT_SUCCESS(Status
)) {
1991 ERR("CcSetFileSizes threw exception %08x\n", Status
);
1992 ExReleaseResourceLite(fileref
->fcb
->Header
.Resource
);
1997 fileref
->fcb
->deleted
= TRUE
;
1999 le
= fileref
->children
.Flink
;
2000 while (le
!= &fileref
->children
) {
2001 file_ref
* fr2
= CONTAINING_RECORD(le
, file_ref
, list_entry
);
2003 if (fr2
->fcb
->ads
) {
2004 fr2
->fcb
->deleted
= TRUE
;
2005 mark_fcb_dirty(fr2
->fcb
);
2013 le
= fileref
->fcb
->hardlinks
.Flink
;
2014 while (le
!= &fileref
->fcb
->hardlinks
) {
2015 hardlink
* hl
= CONTAINING_RECORD(le
, hardlink
, list_entry
);
2017 if (hl
->parent
== fileref
->parent
->fcb
->inode
&& hl
->index
== fileref
->dc
->index
) {
2018 RemoveEntryList(&hl
->list_entry
);
2020 if (hl
->name
.Buffer
)
2021 ExFreePool(hl
->name
.Buffer
);
2023 if (hl
->utf8
.Buffer
)
2024 ExFreePool(hl
->utf8
.Buffer
);
2033 } else if (fileref
->fcb
->subvol
->parent
== fileref
->parent
->fcb
->subvol
->id
) { // valid subvolume
2034 if (fileref
->fcb
->subvol
->root_item
.num_references
> 1) {
2035 fileref
->fcb
->subvol
->root_item
.num_references
--;
2037 mark_fcb_dirty(fileref
->fcb
); // so ROOT_ITEM gets updated
2041 // FIXME - we need a lock here
2043 RemoveEntryList(&fileref
->fcb
->subvol
->list_entry
);
2045 InsertTailList(&fileref
->fcb
->Vcb
->drop_roots
, &fileref
->fcb
->subvol
->list_entry
);
2047 le
= fileref
->children
.Flink
;
2048 while (le
!= &fileref
->children
) {
2049 file_ref
* fr2
= CONTAINING_RECORD(le
, file_ref
, list_entry
);
2051 if (fr2
->fcb
->ads
) {
2052 fr2
->fcb
->deleted
= TRUE
;
2053 mark_fcb_dirty(fr2
->fcb
);
2061 fileref
->fcb
->deleted
= TRUE
;
2062 mark_fcb_dirty(fileref
->fcb
);
2065 // remove dir_child from parent
2068 TRACE("delete file %.*S\n", fileref
->dc
->name
.Length
/ sizeof(WCHAR
), fileref
->dc
->name
.Buffer
);
2070 ExAcquireResourceExclusiveLite(&fileref
->parent
->fcb
->nonpaged
->dir_children_lock
, TRUE
);
2071 RemoveEntryList(&fileref
->dc
->list_entry_index
);
2073 if (!fileref
->fcb
->ads
)
2074 remove_dir_child_from_hash_lists(fileref
->parent
->fcb
, fileref
->dc
);
2076 ExReleaseResourceLite(&fileref
->parent
->fcb
->nonpaged
->dir_children_lock
);
2078 if (!fileref
->oldutf8
.Buffer
)
2079 fileref
->oldutf8
= fileref
->dc
->utf8
;
2081 ExFreePool(fileref
->dc
->utf8
.Buffer
);
2083 utf8len
= fileref
->dc
->utf8
.Length
;
2085 fileref
->oldindex
= fileref
->dc
->index
;
2087 ExFreePool(fileref
->dc
->name
.Buffer
);
2088 ExFreePool(fileref
->dc
->name_uc
.Buffer
);
2089 ExFreePool(fileref
->dc
);
2094 // update INODE_ITEM of parent
2096 ExAcquireResourceExclusiveLite(fileref
->parent
->fcb
->Header
.Resource
, TRUE
);
2098 fileref
->parent
->fcb
->inode_item
.transid
= fileref
->fcb
->Vcb
->superblock
.generation
;
2099 fileref
->parent
->fcb
->inode_item
.sequence
++;
2100 fileref
->parent
->fcb
->inode_item
.st_ctime
= now
;
2102 if (!fileref
->fcb
->ads
) {
2103 TRACE("fileref->parent->fcb->inode_item.st_size (inode %llx) was %llx\n", fileref
->parent
->fcb
->inode
, fileref
->parent
->fcb
->inode_item
.st_size
);
2104 fileref
->parent
->fcb
->inode_item
.st_size
-= utf8len
* 2;
2105 TRACE("fileref->parent->fcb->inode_item.st_size (inode %llx) now %llx\n", fileref
->parent
->fcb
->inode
, fileref
->parent
->fcb
->inode_item
.st_size
);
2106 fileref
->parent
->fcb
->inode_item
.st_mtime
= now
;
2109 fileref
->parent
->fcb
->inode_item_changed
= TRUE
;
2110 ExReleaseResourceLite(fileref
->parent
->fcb
->Header
.Resource
);
2112 if (!fileref
->fcb
->ads
&& fileref
->parent
->dc
)
2113 send_notification_fcb(fileref
->parent
, FILE_NOTIFY_CHANGE_LAST_WRITE
, FILE_ACTION_MODIFIED
, NULL
);
2115 mark_fcb_dirty(fileref
->parent
->fcb
);
2117 fileref
->fcb
->subvol
->root_item
.ctransid
= fileref
->fcb
->Vcb
->superblock
.generation
;
2118 fileref
->fcb
->subvol
->root_item
.ctime
= now
;
2120 newlength
.QuadPart
= 0;
2122 if (FileObject
&& !CcUninitializeCacheMap(FileObject
, &newlength
, NULL
))
2123 TRACE("CcUninitializeCacheMap failed\n");
2125 ExReleaseResourceLite(fileref
->fcb
->Header
.Resource
);
2127 return STATUS_SUCCESS
;
2130 _Dispatch_type_(IRP_MJ_CLEANUP
)
2131 _Function_class_(DRIVER_DISPATCH
)
2132 static NTSTATUS
drv_cleanup(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
2134 PIO_STACK_LOCATION IrpSp
= IoGetCurrentIrpStackLocation(Irp
);
2135 PFILE_OBJECT FileObject
= IrpSp
->FileObject
;
2136 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
2137 fcb
* fcb
= FileObject
->FsContext
;
2140 FsRtlEnterFileSystem();
2144 top_level
= is_top_level(Irp
);
2146 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
2147 Status
= vol_cleanup(DeviceObject
, Irp
);
2149 } else if (DeviceObject
== master_devobj
) {
2150 TRACE("closing file system\n");
2151 Status
= STATUS_SUCCESS
;
2153 } else if (!Vcb
|| Vcb
->type
!= VCB_TYPE_FS
) {
2154 Status
= STATUS_INVALID_PARAMETER
;
2158 if (FileObject
->Flags
& FO_CLEANUP_COMPLETE
) {
2159 TRACE("FileObject %p already cleaned up\n", FileObject
);
2160 Status
= STATUS_SUCCESS
;
2165 ERR("fcb was NULL\n");
2166 Status
= STATUS_INVALID_PARAMETER
;
2170 // We have to use the pointer to Vcb stored in the fcb, as we can receive cleanup
2171 // messages belonging to other devices.
2173 if (FileObject
&& FileObject
->FsContext
) {
2179 ccb
= FileObject
->FsContext2
;
2180 fileref
= ccb
? ccb
->fileref
: NULL
;
2182 TRACE("cleanup called for FileObject %p\n", FileObject
);
2183 TRACE("fileref %p (%S), refcount = %u, open_count = %u\n", fileref
, file_desc(FileObject
), fileref
? fileref
->refcount
: 0, fileref
? fileref
->open_count
: 0);
2185 ExAcquireResourceSharedLite(&fcb
->Vcb
->tree_lock
, TRUE
);
2187 ExAcquireResourceExclusiveLite(fcb
->Header
.Resource
, TRUE
);
2189 IoRemoveShareAccess(FileObject
, &fcb
->share_access
);
2192 FsRtlNotifyCleanup(fcb
->Vcb
->NotifySync
, &fcb
->Vcb
->DirNotifyList
, ccb
);
2195 oc
= InterlockedDecrement(&fileref
->open_count
);
2196 #ifdef DEBUG_FCB_REFCOUNTS
2197 ERR("fileref %p: open_count now %i\n", fileref
, oc
);
2201 if (ccb
&& ccb
->options
& FILE_DELETE_ON_CLOSE
&& fileref
)
2202 fileref
->delete_on_close
= TRUE
;
2204 if (fileref
&& fileref
->delete_on_close
&& fcb
->type
== BTRFS_TYPE_DIRECTORY
&& fcb
->inode_item
.st_size
> 0 && fcb
!= fcb
->Vcb
->dummy_fcb
)
2205 fileref
->delete_on_close
= FALSE
;
2207 if (fcb
->Vcb
->locked
&& fcb
->Vcb
->locked_fileobj
== FileObject
) {
2208 TRACE("unlocking volume\n");
2209 do_unlock_volume(fcb
->Vcb
);
2210 FsRtlNotifyVolumeEvent(FileObject
, FSRTL_VOLUME_UNLOCK
);
2213 if (ccb
&& ccb
->reserving
) {
2214 fcb
->subvol
->reserved
= NULL
;
2215 ccb
->reserving
= FALSE
;
2216 // FIXME - flush all of subvol's fcbs
2219 if (fileref
&& oc
== 0) {
2220 if (!fcb
->Vcb
->removing
) {
2221 if (fileref
&& fileref
->delete_on_close
&& fileref
!= fcb
->Vcb
->root_fileref
&& fcb
!= fcb
->Vcb
->volume_fcb
) {
2222 LIST_ENTRY rollback
;
2224 InitializeListHead(&rollback
);
2226 if (!fileref
->fcb
->ads
|| fileref
->dc
) {
2227 if (fileref
->fcb
->ads
) {
2228 send_notification_fileref(fileref
->parent
, fcb
->type
== BTRFS_TYPE_DIRECTORY
? FILE_NOTIFY_CHANGE_DIR_NAME
: FILE_NOTIFY_CHANGE_FILE_NAME
,
2229 FILE_ACTION_REMOVED
, &fileref
->dc
->name
);
2231 send_notification_fileref(fileref
, fcb
->type
== BTRFS_TYPE_DIRECTORY
? FILE_NOTIFY_CHANGE_DIR_NAME
: FILE_NOTIFY_CHANGE_FILE_NAME
, FILE_ACTION_REMOVED
, NULL
);
2234 ExReleaseResourceLite(fcb
->Header
.Resource
);
2237 // fcb_lock needs to be acquired before fcb->Header.Resource
2238 acquire_fcb_lock_exclusive(fcb
->Vcb
);
2240 Status
= delete_fileref(fileref
, FileObject
, Irp
, &rollback
);
2241 if (!NT_SUCCESS(Status
)) {
2242 ERR("delete_fileref returned %08x\n", Status
);
2243 do_rollback(fcb
->Vcb
, &rollback
);
2244 release_fcb_lock(fcb
->Vcb
);
2245 ExReleaseResourceLite(&fcb
->Vcb
->tree_lock
);
2249 release_fcb_lock(fcb
->Vcb
);
2253 clear_rollback(&rollback
);
2254 } else if (FileObject
->Flags
& FO_CACHE_SUPPORTED
&& fcb
->nonpaged
->segment_object
.DataSectionObject
) {
2255 IO_STATUS_BLOCK iosb
;
2256 CcFlushCache(FileObject
->SectionObjectPointer
, NULL
, 0, &iosb
);
2258 if (!NT_SUCCESS(iosb
.Status
)) {
2259 ERR("CcFlushCache returned %08x\n", iosb
.Status
);
2262 if (!ExIsResourceAcquiredSharedLite(fcb
->Header
.PagingIoResource
)) {
2263 ExAcquireResourceExclusiveLite(fcb
->Header
.PagingIoResource
, TRUE
);
2264 ExReleaseResourceLite(fcb
->Header
.PagingIoResource
);
2267 CcPurgeCacheSection(&fcb
->nonpaged
->segment_object
, NULL
, 0, FALSE
);
2269 TRACE("flushed cache on close (FileObject = %p, fcb = %p, AllocationSize = %llx, FileSize = %llx, ValidDataLength = %llx)\n",
2270 FileObject
, fcb
, fcb
->Header
.AllocationSize
.QuadPart
, fcb
->Header
.FileSize
.QuadPart
, fcb
->Header
.ValidDataLength
.QuadPart
);
2274 if (fcb
->Vcb
&& fcb
!= fcb
->Vcb
->volume_fcb
)
2275 CcUninitializeCacheMap(FileObject
, NULL
, NULL
);
2279 ExReleaseResourceLite(fcb
->Header
.Resource
);
2281 ExReleaseResourceLite(&fcb
->Vcb
->tree_lock
);
2283 FileObject
->Flags
|= FO_CLEANUP_COMPLETE
;
2286 Status
= STATUS_SUCCESS
;
2289 TRACE("returning %08x\n", Status
);
2291 Irp
->IoStatus
.Status
= Status
;
2292 Irp
->IoStatus
.Information
= 0;
2294 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
2297 IoSetTopLevelIrp(NULL
);
2299 FsRtlExitFileSystem();
2305 BOOL
get_file_attributes_from_xattr(_In_reads_bytes_(len
) char* val
, _In_ UINT16 len
, _Out_ ULONG
* atts
) {
2306 if (len
> 2 && val
[0] == '0' && val
[1] == 'x') {
2310 for (i
= 2; i
< len
; i
++) {
2313 if (val
[i
] >= '0' && val
[i
] <= '9')
2314 dosnum
|= val
[i
] - '0';
2315 else if (val
[i
] >= 'a' && val
[i
] <= 'f')
2316 dosnum
|= val
[i
] + 10 - 'a';
2317 else if (val
[i
] >= 'A' && val
[i
] <= 'F')
2318 dosnum
|= val
[i
] + 10 - 'a';
2321 TRACE("DOSATTRIB: %08x\n", dosnum
);
2331 ULONG
get_file_attributes(_In_
_Requires_lock_held_(_Curr_
->tree_lock
) device_extension
* Vcb
, _In_ root
* r
, _In_ UINT64 inode
,
2332 _In_ UINT8 type
, _In_ BOOL dotfile
, _In_ BOOL ignore_xa
, _In_opt_ PIRP Irp
) {
2337 if (!ignore_xa
&& get_xattr(Vcb
, r
, inode
, EA_DOSATTRIB
, EA_DOSATTRIB_HASH
, (UINT8
**)&eaval
, &ealen
, Irp
)) {
2340 if (get_file_attributes_from_xattr(eaval
, ealen
, &dosnum
)) {
2343 if (type
== BTRFS_TYPE_DIRECTORY
)
2344 dosnum
|= FILE_ATTRIBUTE_DIRECTORY
;
2345 else if (type
== BTRFS_TYPE_SYMLINK
)
2346 dosnum
|= FILE_ATTRIBUTE_REPARSE_POINT
;
2348 if (type
!= BTRFS_TYPE_DIRECTORY
)
2349 dosnum
&= ~FILE_ATTRIBUTE_DIRECTORY
;
2351 if (inode
== SUBVOL_ROOT_INODE
) {
2352 if (r
->root_item
.flags
& BTRFS_SUBVOL_READONLY
)
2353 dosnum
|= FILE_ATTRIBUTE_READONLY
;
2355 dosnum
&= ~FILE_ATTRIBUTE_READONLY
;
2365 case BTRFS_TYPE_DIRECTORY
:
2366 att
= FILE_ATTRIBUTE_DIRECTORY
;
2369 case BTRFS_TYPE_SYMLINK
:
2370 att
= FILE_ATTRIBUTE_REPARSE_POINT
;
2379 att
|= FILE_ATTRIBUTE_HIDDEN
;
2382 att
|= FILE_ATTRIBUTE_ARCHIVE
;
2384 if (inode
== SUBVOL_ROOT_INODE
) {
2385 if (r
->root_item
.flags
& BTRFS_SUBVOL_READONLY
)
2386 att
|= FILE_ATTRIBUTE_READONLY
;
2388 att
&= ~FILE_ATTRIBUTE_READONLY
;
2391 // FIXME - get READONLY from ii->st_mode
2392 // FIXME - return SYSTEM for block/char devices?
2395 att
= FILE_ATTRIBUTE_NORMAL
;
2400 NTSTATUS
sync_read_phys(_In_ PDEVICE_OBJECT DeviceObject
, _In_ UINT64 StartingOffset
, _In_ ULONG Length
,
2401 _Out_writes_bytes_(Length
) PUCHAR Buffer
, _In_ BOOL override
) {
2402 IO_STATUS_BLOCK IoStatus
;
2403 LARGE_INTEGER Offset
;
2405 PIO_STACK_LOCATION IrpSp
;
2407 read_context context
;
2411 RtlZeroMemory(&context
, sizeof(read_context
));
2412 KeInitializeEvent(&context
.Event
, NotificationEvent
, FALSE
);
2414 Offset
.QuadPart
= (LONGLONG
)StartingOffset
;
2416 Irp
= IoAllocateIrp(DeviceObject
->StackSize
, FALSE
);
2419 ERR("IoAllocateIrp failed\n");
2420 return STATUS_INSUFFICIENT_RESOURCES
;
2423 Irp
->Flags
|= IRP_NOCACHE
;
2424 IrpSp
= IoGetNextIrpStackLocation(Irp
);
2425 IrpSp
->MajorFunction
= IRP_MJ_READ
;
2428 IrpSp
->Flags
|= SL_OVERRIDE_VERIFY_VOLUME
;
2430 if (DeviceObject
->Flags
& DO_BUFFERED_IO
) {
2431 Irp
->AssociatedIrp
.SystemBuffer
= ExAllocatePoolWithTag(NonPagedPool
, Length
, ALLOC_TAG
);
2432 if (!Irp
->AssociatedIrp
.SystemBuffer
) {
2433 ERR("out of memory\n");
2434 Status
= STATUS_INSUFFICIENT_RESOURCES
;
2438 Irp
->Flags
|= IRP_BUFFERED_IO
| IRP_DEALLOCATE_BUFFER
| IRP_INPUT_OPERATION
;
2440 Irp
->UserBuffer
= Buffer
;
2441 } else if (DeviceObject
->Flags
& DO_DIRECT_IO
) {
2442 Irp
->MdlAddress
= IoAllocateMdl(Buffer
, Length
, FALSE
, FALSE
, NULL
);
2443 if (!Irp
->MdlAddress
) {
2444 ERR("IoAllocateMdl failed\n");
2445 Status
= STATUS_INSUFFICIENT_RESOURCES
;
2449 Status
= STATUS_SUCCESS
;
2452 MmProbeAndLockPages(Irp
->MdlAddress
, KernelMode
, IoWriteAccess
);
2453 } _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER
) {
2454 Status
= _SEH2_GetExceptionCode();
2457 if (!NT_SUCCESS(Status
)) {
2458 ERR("MmProbeAndLockPages threw exception %08x\n", Status
);
2459 IoFreeMdl(Irp
->MdlAddress
);
2463 Irp
->UserBuffer
= Buffer
;
2465 IrpSp
->Parameters
.Read
.Length
= Length
;
2466 IrpSp
->Parameters
.Read
.ByteOffset
= Offset
;
2468 Irp
->UserIosb
= &IoStatus
;
2470 Irp
->UserEvent
= &context
.Event
;
2472 IoSetCompletionRoutine(Irp
, read_completion
, &context
, TRUE
, TRUE
, TRUE
);
2474 Status
= IoCallDriver(DeviceObject
, Irp
);
2476 if (Status
== STATUS_PENDING
) {
2477 KeWaitForSingleObject(&context
.Event
, Executive
, KernelMode
, FALSE
, NULL
);
2478 Status
= context
.iosb
.Status
;
2481 if (DeviceObject
->Flags
& DO_DIRECT_IO
) {
2482 MmUnlockPages(Irp
->MdlAddress
);
2483 IoFreeMdl(Irp
->MdlAddress
);
2492 static NTSTATUS
read_superblock(_In_ device_extension
* Vcb
, _In_ PDEVICE_OBJECT device
, _In_ UINT64 length
) {
2496 UINT8 valid_superblocks
;
2498 to_read
= device
->SectorSize
== 0 ? sizeof(superblock
) : (ULONG
)sector_align(sizeof(superblock
), device
->SectorSize
);
2500 sb
= ExAllocatePoolWithTag(NonPagedPool
, to_read
, ALLOC_TAG
);
2502 ERR("out of memory\n");
2503 return STATUS_INSUFFICIENT_RESOURCES
;
2506 if (superblock_addrs
[0] + to_read
> length
) {
2507 WARN("device was too short to have any superblock\n");
2509 return STATUS_UNRECOGNIZED_VOLUME
;
2513 valid_superblocks
= 0;
2515 while (superblock_addrs
[i
] > 0) {
2518 if (i
> 0 && superblock_addrs
[i
] + to_read
> length
)
2521 Status
= sync_read_phys(device
, superblock_addrs
[i
], to_read
, (PUCHAR
)sb
, FALSE
);
2522 if (!NT_SUCCESS(Status
)) {
2523 ERR("Failed to read superblock %u: %08x\n", i
, Status
);
2528 if (sb
->magic
!= BTRFS_MAGIC
) {
2530 TRACE("not a BTRFS volume\n");
2532 return STATUS_UNRECOGNIZED_VOLUME
;
2535 TRACE("got superblock %u!\n", i
);
2537 crc32
= ~calc_crc32c(0xffffffff, (UINT8
*)&sb
->uuid
, (ULONG
)sizeof(superblock
) - sizeof(sb
->checksum
));
2539 if (crc32
!= *((UINT32
*)sb
->checksum
))
2540 WARN("crc32 was %08x, expected %08x\n", crc32
, *((UINT32
*)sb
->checksum
));
2541 else if (sb
->sector_size
== 0)
2542 WARN("superblock sector size was 0\n");
2543 else if (sb
->node_size
< sizeof(tree_header
) + sizeof(internal_node
) || sb
->node_size
> 0x10000)
2544 WARN("invalid node size %x\n", sb
->node_size
);
2545 else if ((sb
->node_size
% sb
->sector_size
) != 0)
2546 WARN("node size %x was not a multiple of sector_size %x\n", sb
->node_size
, sb
->sector_size
);
2547 else if (valid_superblocks
== 0 || sb
->generation
> Vcb
->superblock
.generation
) {
2548 RtlCopyMemory(&Vcb
->superblock
, sb
, sizeof(superblock
));
2549 valid_superblocks
++;
2558 if (valid_superblocks
== 0) {
2559 ERR("could not find any valid superblocks\n");
2560 return STATUS_INTERNAL_ERROR
;
2563 TRACE("label is %s\n", Vcb
->superblock
.label
);
2565 return STATUS_SUCCESS
;
2568 NTSTATUS
dev_ioctl(_In_ PDEVICE_OBJECT DeviceObject
, _In_ ULONG ControlCode
, _In_reads_bytes_opt_(InputBufferSize
) PVOID InputBuffer
, _In_ ULONG InputBufferSize
,
2569 _Out_writes_bytes_opt_(OutputBufferSize
) PVOID OutputBuffer
, _In_ ULONG OutputBufferSize
, _In_ BOOLEAN Override
, _Out_opt_ IO_STATUS_BLOCK
* iosb
) {
2573 PIO_STACK_LOCATION IrpSp
;
2574 IO_STATUS_BLOCK IoStatus
;
2576 KeInitializeEvent(&Event
, NotificationEvent
, FALSE
);
2578 Irp
= IoBuildDeviceIoControlRequest(ControlCode
,
2588 if (!Irp
) return STATUS_INSUFFICIENT_RESOURCES
;
2591 IrpSp
= IoGetNextIrpStackLocation(Irp
);
2592 IrpSp
->Flags
|= SL_OVERRIDE_VERIFY_VOLUME
;
2595 Status
= IoCallDriver(DeviceObject
, Irp
);
2597 if (Status
== STATUS_PENDING
) {
2598 KeWaitForSingleObject(&Event
, Executive
, KernelMode
, FALSE
, NULL
);
2599 Status
= IoStatus
.Status
;
2608 _Requires_exclusive_lock_held_(Vcb
->tree_lock
)
2609 static NTSTATUS
add_root(_Inout_ device_extension
* Vcb
, _In_ UINT64 id
, _In_ UINT64 addr
,
2610 _In_ UINT64 generation
, _In_opt_ traverse_ptr
* tp
) {
2611 root
* r
= ExAllocatePoolWithTag(PagedPool
, sizeof(root
), ALLOC_TAG
);
2613 ERR("out of memory\n");
2614 return STATUS_INSUFFICIENT_RESOURCES
;
2619 r
->received
= FALSE
;
2621 r
->treeholder
.address
= addr
;
2622 r
->treeholder
.tree
= NULL
;
2623 r
->treeholder
.generation
= generation
;
2626 InitializeListHead(&r
->fcbs
);
2628 r
->nonpaged
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(root_nonpaged
), ALLOC_TAG
);
2630 ERR("out of memory\n");
2632 return STATUS_INSUFFICIENT_RESOURCES
;
2635 ExInitializeResourceLite(&r
->nonpaged
->load_tree_lock
);
2640 RtlCopyMemory(&r
->root_item
, tp
->item
->data
, min(sizeof(ROOT_ITEM
), tp
->item
->size
));
2641 if (tp
->item
->size
< sizeof(ROOT_ITEM
))
2642 RtlZeroMemory(((UINT8
*)&r
->root_item
) + tp
->item
->size
, sizeof(ROOT_ITEM
) - tp
->item
->size
);
2644 RtlZeroMemory(&r
->root_item
, sizeof(ROOT_ITEM
));
2646 if (!Vcb
->readonly
&& (r
->id
== BTRFS_ROOT_ROOT
|| r
->id
== BTRFS_ROOT_FSTREE
|| (r
->id
>= 0x100 && !(r
->id
& 0xf000000000000000)))) { // FS tree root
2647 // FIXME - don't call this if subvol is readonly (though we will have to if we ever toggle this flag)
2648 get_last_inode(Vcb
, r
, NULL
);
2650 if (r
->id
== BTRFS_ROOT_ROOT
&& r
->lastinode
< 0x100)
2651 r
->lastinode
= 0x100;
2654 InsertTailList(&Vcb
->roots
, &r
->list_entry
);
2657 case BTRFS_ROOT_ROOT
:
2661 case BTRFS_ROOT_EXTENT
:
2662 Vcb
->extent_root
= r
;
2665 case BTRFS_ROOT_CHUNK
:
2666 Vcb
->chunk_root
= r
;
2669 case BTRFS_ROOT_DEVTREE
:
2673 case BTRFS_ROOT_CHECKSUM
:
2674 Vcb
->checksum_root
= r
;
2677 case BTRFS_ROOT_UUID
:
2681 case BTRFS_ROOT_FREE_SPACE
:
2682 Vcb
->space_root
= r
;
2685 case BTRFS_ROOT_DATA_RELOC
:
2686 Vcb
->data_reloc_root
= r
;
2690 return STATUS_SUCCESS
;
2693 static NTSTATUS
look_for_roots(_Requires_exclusive_lock_held_(_Curr_
->tree_lock
) _In_ device_extension
* Vcb
, _In_opt_ PIRP Irp
) {
2694 traverse_ptr tp
, next_tp
;
2699 searchkey
.obj_id
= 0;
2700 searchkey
.obj_type
= 0;
2701 searchkey
.offset
= 0;
2703 Status
= find_item(Vcb
, Vcb
->root_root
, &tp
, &searchkey
, FALSE
, Irp
);
2704 if (!NT_SUCCESS(Status
)) {
2705 ERR("error - find_item returned %08x\n", Status
);
2710 TRACE("(%llx,%x,%llx)\n", tp
.item
->key
.obj_id
, tp
.item
->key
.obj_type
, tp
.item
->key
.offset
);
2712 if (tp
.item
->key
.obj_type
== TYPE_ROOT_ITEM
) {
2713 ROOT_ITEM
* ri
= (ROOT_ITEM
*)tp
.item
->data
;
2715 if (tp
.item
->size
< offsetof(ROOT_ITEM
, byte_limit
)) {
2716 ERR("(%llx,%x,%llx) was %u bytes, expected at least %u\n", tp
.item
->key
.obj_id
, tp
.item
->key
.obj_type
, tp
.item
->key
.offset
, tp
.item
->size
, offsetof(ROOT_ITEM
, byte_limit
));
2718 TRACE("root %llx - address %llx\n", tp
.item
->key
.obj_id
, ri
->block_number
);
2720 Status
= add_root(Vcb
, tp
.item
->key
.obj_id
, ri
->block_number
, ri
->generation
, &tp
);
2721 if (!NT_SUCCESS(Status
)) {
2722 ERR("add_root returned %08x\n", Status
);
2726 } else if (tp
.item
->key
.obj_type
== TYPE_ROOT_BACKREF
&& !IsListEmpty(&Vcb
->roots
)) {
2727 root
* lastroot
= CONTAINING_RECORD(Vcb
->roots
.Blink
, root
, list_entry
);
2729 if (lastroot
->id
== tp
.item
->key
.obj_id
)
2730 lastroot
->parent
= tp
.item
->key
.offset
;
2733 b
= find_next_item(Vcb
, &tp
, &next_tp
, FALSE
, Irp
);
2739 if (!Vcb
->readonly
&& !Vcb
->data_reloc_root
) {
2747 WARN("data reloc root doesn't exist, creating it\n");
2749 Status
= create_root(Vcb
, BTRFS_ROOT_DATA_RELOC
, &reloc_root
, FALSE
, 0, Irp
);
2751 if (!NT_SUCCESS(Status
)) {
2752 ERR("create_root returned %08x\n", Status
);
2756 reloc_root
->root_item
.inode
.generation
= 1;
2757 reloc_root
->root_item
.inode
.st_size
= 3;
2758 reloc_root
->root_item
.inode
.st_blocks
= Vcb
->superblock
.node_size
;
2759 reloc_root
->root_item
.inode
.st_nlink
= 1;
2760 reloc_root
->root_item
.inode
.st_mode
= 040755;
2761 reloc_root
->root_item
.inode
.flags
= 0xffffffff80000000;
2762 reloc_root
->root_item
.objid
= SUBVOL_ROOT_INODE
;
2763 reloc_root
->root_item
.bytes_used
= Vcb
->superblock
.node_size
;
2765 ii
= ExAllocatePoolWithTag(PagedPool
, sizeof(INODE_ITEM
), ALLOC_TAG
);
2767 ERR("out of memory\n");
2768 return STATUS_INSUFFICIENT_RESOURCES
;
2771 KeQuerySystemTime(&time
);
2772 win_time_to_unix(time
, &now
);
2774 RtlZeroMemory(ii
, sizeof(INODE_ITEM
));
2775 ii
->generation
= Vcb
->superblock
.generation
;
2776 ii
->st_blocks
= Vcb
->superblock
.node_size
;
2778 ii
->st_mode
= 040755;
2783 Status
= insert_tree_item(Vcb
, reloc_root
, SUBVOL_ROOT_INODE
, TYPE_INODE_ITEM
, 0, ii
, sizeof(INODE_ITEM
), NULL
, Irp
);
2784 if (!NT_SUCCESS(Status
)) {
2785 ERR("insert_tree_item returned %08x\n", Status
);
2790 irlen
= (UINT16
)offsetof(INODE_REF
, name
[0]) + 2;
2791 ir
= ExAllocatePoolWithTag(PagedPool
, irlen
, ALLOC_TAG
);
2793 ERR("out of memory\n");
2794 return STATUS_INSUFFICIENT_RESOURCES
;
2802 Status
= insert_tree_item(Vcb
, reloc_root
, SUBVOL_ROOT_INODE
, TYPE_INODE_REF
, SUBVOL_ROOT_INODE
, ir
, irlen
, NULL
, Irp
);
2803 if (!NT_SUCCESS(Status
)) {
2804 ERR("insert_tree_item returned %08x\n", Status
);
2809 Vcb
->data_reloc_root
= reloc_root
;
2810 Vcb
->need_write
= TRUE
;
2813 return STATUS_SUCCESS
;
2816 static NTSTATUS
find_disk_holes(_In_
_Requires_lock_held_(_Curr_
->tree_lock
) device_extension
* Vcb
, _In_ device
* dev
, _In_opt_ PIRP Irp
) {
2818 traverse_ptr tp
, next_tp
;
2823 InitializeListHead(&dev
->space
);
2825 searchkey
.obj_id
= 0;
2826 searchkey
.obj_type
= TYPE_DEV_STATS
;
2827 searchkey
.offset
= dev
->devitem
.dev_id
;
2829 Status
= find_item(Vcb
, Vcb
->dev_root
, &tp
, &searchkey
, FALSE
, Irp
);
2830 if (NT_SUCCESS(Status
) && !keycmp(tp
.item
->key
, searchkey
))
2831 RtlCopyMemory(dev
->stats
, tp
.item
->data
, min(sizeof(UINT64
) * 5, tp
.item
->size
));
2833 searchkey
.obj_id
= dev
->devitem
.dev_id
;
2834 searchkey
.obj_type
= TYPE_DEV_EXTENT
;
2835 searchkey
.offset
= 0;
2837 Status
= find_item(Vcb
, Vcb
->dev_root
, &tp
, &searchkey
, FALSE
, Irp
);
2838 if (!NT_SUCCESS(Status
)) {
2839 ERR("error - find_item returned %08x\n", Status
);
2846 if (tp
.item
->key
.obj_id
== dev
->devitem
.dev_id
&& tp
.item
->key
.obj_type
== TYPE_DEV_EXTENT
) {
2847 if (tp
.item
->size
>= sizeof(DEV_EXTENT
)) {
2848 DEV_EXTENT
* de
= (DEV_EXTENT
*)tp
.item
->data
;
2850 if (tp
.item
->key
.offset
> lastaddr
) {
2851 Status
= add_space_entry(&dev
->space
, NULL
, lastaddr
, tp
.item
->key
.offset
- lastaddr
);
2852 if (!NT_SUCCESS(Status
)) {
2853 ERR("add_space_entry returned %08x\n", Status
);
2858 lastaddr
= tp
.item
->key
.offset
+ de
->length
;
2860 ERR("(%llx,%x,%llx) was %u bytes, expected %u\n", tp
.item
->key
.obj_id
, tp
.item
->key
.obj_type
, tp
.item
->key
.offset
, tp
.item
->size
, sizeof(DEV_EXTENT
));
2864 b
= find_next_item(Vcb
, &tp
, &next_tp
, FALSE
, Irp
);
2868 if (tp
.item
->key
.obj_id
> searchkey
.obj_id
|| tp
.item
->key
.obj_type
> searchkey
.obj_type
)
2873 if (lastaddr
< dev
->devitem
.num_bytes
) {
2874 Status
= add_space_entry(&dev
->space
, NULL
, lastaddr
, dev
->devitem
.num_bytes
- lastaddr
);
2875 if (!NT_SUCCESS(Status
)) {
2876 ERR("add_space_entry returned %08x\n", Status
);
2881 // The Linux driver doesn't like to allocate chunks within the first megabyte of a device.
2883 space_list_subtract2(&dev
->space
, NULL
, 0, 0x100000, NULL
, NULL
);
2885 return STATUS_SUCCESS
;
2888 static void add_device_to_list(_In_ device_extension
* Vcb
, _In_ device
* dev
) {
2891 le
= Vcb
->devices
.Flink
;
2893 while (le
!= &Vcb
->devices
) {
2894 device
* dev2
= CONTAINING_RECORD(le
, device
, list_entry
);
2896 if (dev2
->devitem
.dev_id
> dev
->devitem
.dev_id
) {
2897 InsertHeadList(le
->Blink
, &dev
->list_entry
);
2904 InsertTailList(&Vcb
->devices
, &dev
->list_entry
);
2908 device
* find_device_from_uuid(_In_ device_extension
* Vcb
, _In_ BTRFS_UUID
* uuid
) {
2909 volume_device_extension
* vde
;
2910 pdo_device_extension
* pdode
;
2913 le
= Vcb
->devices
.Flink
;
2914 while (le
!= &Vcb
->devices
) {
2915 device
* dev
= CONTAINING_RECORD(le
, device
, list_entry
);
2917 TRACE("device %llx, uuid %02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n", dev
->devitem
.dev_id
,
2918 dev
->devitem
.device_uuid
.uuid
[0], dev
->devitem
.device_uuid
.uuid
[1], dev
->devitem
.device_uuid
.uuid
[2], dev
->devitem
.device_uuid
.uuid
[3], dev
->devitem
.device_uuid
.uuid
[4], dev
->devitem
.device_uuid
.uuid
[5], dev
->devitem
.device_uuid
.uuid
[6], dev
->devitem
.device_uuid
.uuid
[7],
2919 dev
->devitem
.device_uuid
.uuid
[8], dev
->devitem
.device_uuid
.uuid
[9], dev
->devitem
.device_uuid
.uuid
[10], dev
->devitem
.device_uuid
.uuid
[11], dev
->devitem
.device_uuid
.uuid
[12], dev
->devitem
.device_uuid
.uuid
[13], dev
->devitem
.device_uuid
.uuid
[14], dev
->devitem
.device_uuid
.uuid
[15]);
2921 if (RtlCompareMemory(&dev
->devitem
.device_uuid
, uuid
, sizeof(BTRFS_UUID
)) == sizeof(BTRFS_UUID
)) {
2922 TRACE("returning device %llx\n", dev
->devitem
.dev_id
);
2936 ExAcquireResourceSharedLite(&pdode
->child_lock
, TRUE
);
2938 if (Vcb
->devices_loaded
< Vcb
->superblock
.num_devices
) {
2939 le
= pdode
->children
.Flink
;
2941 while (le
!= &pdode
->children
) {
2942 volume_child
* vc
= CONTAINING_RECORD(le
, volume_child
, list_entry
);
2944 if (RtlCompareMemory(uuid
, &vc
->uuid
, sizeof(BTRFS_UUID
)) == sizeof(BTRFS_UUID
)) {
2947 dev
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(device
), ALLOC_TAG
);
2949 ExReleaseResourceLite(&pdode
->child_lock
);
2950 ERR("out of memory\n");
2954 RtlZeroMemory(dev
, sizeof(device
));
2955 dev
->devobj
= vc
->devobj
;
2956 dev
->devitem
.device_uuid
= *uuid
;
2957 dev
->devitem
.dev_id
= vc
->devid
;
2958 dev
->devitem
.num_bytes
= vc
->size
;
2959 dev
->seeding
= vc
->seeding
;
2960 dev
->readonly
= dev
->seeding
;
2962 dev
->removable
= FALSE
;
2963 dev
->disk_num
= vc
->disk_num
;
2964 dev
->part_num
= vc
->part_num
;
2965 dev
->num_trim_entries
= 0;
2966 InitializeListHead(&dev
->trim_list
);
2968 add_device_to_list(Vcb
, dev
);
2969 Vcb
->devices_loaded
++;
2971 ExReleaseResourceLite(&pdode
->child_lock
);
2980 ExReleaseResourceLite(&pdode
->child_lock
);
2983 WARN("could not find device with uuid %02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n",
2984 uuid
->uuid
[0], uuid
->uuid
[1], uuid
->uuid
[2], uuid
->uuid
[3], uuid
->uuid
[4], uuid
->uuid
[5], uuid
->uuid
[6], uuid
->uuid
[7],
2985 uuid
->uuid
[8], uuid
->uuid
[9], uuid
->uuid
[10], uuid
->uuid
[11], uuid
->uuid
[12], uuid
->uuid
[13], uuid
->uuid
[14], uuid
->uuid
[15]);
2990 static BOOL
is_device_removable(_In_ PDEVICE_OBJECT devobj
) {
2992 STORAGE_HOTPLUG_INFO shi
;
2994 Status
= dev_ioctl(devobj
, IOCTL_STORAGE_GET_HOTPLUG_INFO
, NULL
, 0, &shi
, sizeof(STORAGE_HOTPLUG_INFO
), TRUE
, NULL
);
2996 if (!NT_SUCCESS(Status
)) {
2997 ERR("dev_ioctl returned %08x\n", Status
);
3001 return shi
.MediaRemovable
!= 0 ? TRUE
: FALSE
;
3004 static ULONG
get_device_change_count(_In_ PDEVICE_OBJECT devobj
) {
3007 IO_STATUS_BLOCK iosb
;
3009 Status
= dev_ioctl(devobj
, IOCTL_STORAGE_CHECK_VERIFY
, NULL
, 0, &cc
, sizeof(ULONG
), TRUE
, &iosb
);
3011 if (!NT_SUCCESS(Status
)) {
3012 ERR("dev_ioctl returned %08x\n", Status
);
3016 if (iosb
.Information
< sizeof(ULONG
)) {
3017 ERR("iosb.Information was too short\n");
3024 void init_device(_In_ device_extension
* Vcb
, _Inout_ device
* dev
, _In_ BOOL get_nums
) {
3027 ATA_PASS_THROUGH_EX
* apte
;
3028 STORAGE_PROPERTY_QUERY spq
;
3029 DEVICE_TRIM_DESCRIPTOR dtd
;
3031 dev
->removable
= is_device_removable(dev
->devobj
);
3032 dev
->change_count
= dev
->removable
? get_device_change_count(dev
->devobj
) : 0;
3035 STORAGE_DEVICE_NUMBER sdn
;
3037 Status
= dev_ioctl(dev
->devobj
, IOCTL_STORAGE_GET_DEVICE_NUMBER
, NULL
, 0,
3038 &sdn
, sizeof(STORAGE_DEVICE_NUMBER
), TRUE
, NULL
);
3040 if (!NT_SUCCESS(Status
)) {
3041 WARN("IOCTL_STORAGE_GET_DEVICE_NUMBER returned %08x\n", Status
);
3042 dev
->disk_num
= 0xffffffff;
3043 dev
->part_num
= 0xffffffff;
3045 dev
->disk_num
= sdn
.DeviceNumber
;
3046 dev
->part_num
= sdn
.PartitionNumber
;
3051 dev
->readonly
= dev
->seeding
;
3053 dev
->num_trim_entries
= 0;
3054 dev
->stats_changed
= FALSE
;
3055 InitializeListHead(&dev
->trim_list
);
3057 if (!dev
->readonly
) {
3058 Status
= dev_ioctl(dev
->devobj
, IOCTL_DISK_IS_WRITABLE
, NULL
, 0,
3059 NULL
, 0, TRUE
, NULL
);
3060 if (Status
== STATUS_MEDIA_WRITE_PROTECTED
)
3061 dev
->readonly
= TRUE
;
3064 aptelen
= sizeof(ATA_PASS_THROUGH_EX
) + 512;
3065 apte
= ExAllocatePoolWithTag(NonPagedPool
, aptelen
, ALLOC_TAG
);
3067 ERR("out of memory\n");
3071 RtlZeroMemory(apte
, aptelen
);
3073 apte
->Length
= sizeof(ATA_PASS_THROUGH_EX
);
3074 apte
->AtaFlags
= ATA_FLAGS_DATA_IN
;
3075 apte
->DataTransferLength
= aptelen
- sizeof(ATA_PASS_THROUGH_EX
);
3076 apte
->TimeOutValue
= 3;
3077 apte
->DataBufferOffset
= apte
->Length
;
3078 apte
->CurrentTaskFile
[6] = IDE_COMMAND_IDENTIFY
;
3080 Status
= dev_ioctl(dev
->devobj
, IOCTL_ATA_PASS_THROUGH
, apte
, aptelen
,
3081 apte
, aptelen
, TRUE
, NULL
);
3083 if (!NT_SUCCESS(Status
))
3084 TRACE("IOCTL_ATA_PASS_THROUGH returned %08x for IDENTIFY DEVICE\n", Status
);
3086 IDENTIFY_DEVICE_DATA
* idd
= (IDENTIFY_DEVICE_DATA
*)((UINT8
*)apte
+ sizeof(ATA_PASS_THROUGH_EX
));
3088 if (idd
->CommandSetSupport
.FlushCache
) {
3089 dev
->can_flush
= TRUE
;
3090 TRACE("FLUSH CACHE supported\n");
3092 TRACE("FLUSH CACHE not supported\n");
3097 spq
.PropertyId
= StorageDeviceTrimProperty
;
3098 spq
.QueryType
= PropertyStandardQuery
;
3099 spq
.AdditionalParameters
[0] = 0;
3101 Status
= dev_ioctl(dev
->devobj
, IOCTL_STORAGE_QUERY_PROPERTY
, &spq
, sizeof(STORAGE_PROPERTY_QUERY
),
3102 &dtd
, sizeof(DEVICE_TRIM_DESCRIPTOR
), TRUE
, NULL
);
3104 if (NT_SUCCESS(Status
)) {
3105 if (dtd
.TrimEnabled
) {
3108 TRACE("TRIM supported\n");
3110 TRACE("TRIM not supported\n");
3113 RtlZeroMemory(dev
->stats
, sizeof(UINT64
) * 5);
3116 static NTSTATUS
load_chunk_root(_In_
_Requires_lock_held_(_Curr_
->tree_lock
) device_extension
* Vcb
, _In_opt_ PIRP Irp
) {
3117 traverse_ptr tp
, next_tp
;
3123 searchkey
.obj_id
= 0;
3124 searchkey
.obj_type
= 0;
3125 searchkey
.offset
= 0;
3127 Vcb
->data_flags
= 0;
3128 Vcb
->metadata_flags
= 0;
3129 Vcb
->system_flags
= 0;
3131 Status
= find_item(Vcb
, Vcb
->chunk_root
, &tp
, &searchkey
, FALSE
, Irp
);
3132 if (!NT_SUCCESS(Status
)) {
3133 ERR("error - find_item returned %08x\n", Status
);
3138 TRACE("(%llx,%x,%llx)\n", tp
.item
->key
.obj_id
, tp
.item
->key
.obj_type
, tp
.item
->key
.offset
);
3140 if (tp
.item
->key
.obj_id
== 1 && tp
.item
->key
.obj_type
== TYPE_DEV_ITEM
) {
3141 if (tp
.item
->size
< sizeof(DEV_ITEM
)) {
3142 ERR("(%llx,%x,%llx) was %u bytes, expected %u\n", tp
.item
->key
.obj_id
, tp
.item
->key
.obj_type
, tp
.item
->key
.offset
, tp
.item
->size
, sizeof(DEV_ITEM
));
3144 DEV_ITEM
* di
= (DEV_ITEM
*)tp
.item
->data
;
3148 le
= Vcb
->devices
.Flink
;
3149 while (le
!= &Vcb
->devices
) {
3150 device
* dev
= CONTAINING_RECORD(le
, device
, list_entry
);
3152 if (dev
->devobj
&& RtlCompareMemory(&dev
->devitem
.device_uuid
, &di
->device_uuid
, sizeof(BTRFS_UUID
)) == sizeof(BTRFS_UUID
)) {
3153 RtlCopyMemory(&dev
->devitem
, tp
.item
->data
, min(tp
.item
->size
, sizeof(DEV_ITEM
)));
3155 if (le
!= Vcb
->devices
.Flink
)
3156 init_device(Vcb
, dev
, TRUE
);
3165 if (!done
&& Vcb
->vde
) {
3166 volume_device_extension
* vde
= Vcb
->vde
;
3167 pdo_device_extension
* pdode
= vde
->pdode
;
3169 ExAcquireResourceSharedLite(&pdode
->child_lock
, TRUE
);
3171 if (Vcb
->devices_loaded
< Vcb
->superblock
.num_devices
) {
3172 le
= pdode
->children
.Flink
;
3174 while (le
!= &pdode
->children
) {
3175 volume_child
* vc
= CONTAINING_RECORD(le
, volume_child
, list_entry
);
3177 if (RtlCompareMemory(&di
->device_uuid
, &vc
->uuid
, sizeof(BTRFS_UUID
)) == sizeof(BTRFS_UUID
)) {
3180 dev
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(device
), ALLOC_TAG
);
3182 ExReleaseResourceLite(&pdode
->child_lock
);
3183 ERR("out of memory\n");
3184 return STATUS_INSUFFICIENT_RESOURCES
;
3187 RtlZeroMemory(dev
, sizeof(device
));
3189 dev
->devobj
= vc
->devobj
;
3190 RtlCopyMemory(&dev
->devitem
, di
, min(tp
.item
->size
, sizeof(DEV_ITEM
)));
3191 dev
->seeding
= vc
->seeding
;
3192 init_device(Vcb
, dev
, FALSE
);
3194 if (dev
->devitem
.num_bytes
> vc
->size
) {
3195 WARN("device %llx: DEV_ITEM says %llx bytes, but Windows only reports %llx\n", tp
.item
->key
.offset
,
3196 dev
->devitem
.num_bytes
, vc
->size
);
3198 dev
->devitem
.num_bytes
= vc
->size
;
3201 dev
->disk_num
= vc
->disk_num
;
3202 dev
->part_num
= vc
->part_num
;
3203 add_device_to_list(Vcb
, dev
);
3204 Vcb
->devices_loaded
++;
3214 if (!Vcb
->options
.allow_degraded
) {
3215 ERR("volume not found: device %llx, uuid %02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n", tp
.item
->key
.offset
,
3216 di
->device_uuid
.uuid
[0], di
->device_uuid
.uuid
[1], di
->device_uuid
.uuid
[2], di
->device_uuid
.uuid
[3], di
->device_uuid
.uuid
[4], di
->device_uuid
.uuid
[5], di
->device_uuid
.uuid
[6], di
->device_uuid
.uuid
[7],
3217 di
->device_uuid
.uuid
[8], di
->device_uuid
.uuid
[9], di
->device_uuid
.uuid
[10], di
->device_uuid
.uuid
[11], di
->device_uuid
.uuid
[12], di
->device_uuid
.uuid
[13], di
->device_uuid
.uuid
[14], di
->device_uuid
.uuid
[15]);
3221 dev
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(device
), ALLOC_TAG
);
3223 ExReleaseResourceLite(&pdode
->child_lock
);
3224 ERR("out of memory\n");
3225 return STATUS_INSUFFICIENT_RESOURCES
;
3228 RtlZeroMemory(dev
, sizeof(device
));
3230 // Missing device, so we keep dev->devobj as NULL
3231 RtlCopyMemory(&dev
->devitem
, di
, min(tp
.item
->size
, sizeof(DEV_ITEM
)));
3232 InitializeListHead(&dev
->trim_list
);
3234 add_device_to_list(Vcb
, dev
);
3235 Vcb
->devices_loaded
++;
3239 ERR("unexpected device %llx found\n", tp
.item
->key
.offset
);
3241 ExReleaseResourceLite(&pdode
->child_lock
);
3244 } else if (tp
.item
->key
.obj_type
== TYPE_CHUNK_ITEM
) {
3245 if (tp
.item
->size
< sizeof(CHUNK_ITEM
)) {
3246 ERR("(%llx,%x,%llx) was %u bytes, expected at least %u\n", tp
.item
->key
.obj_id
, tp
.item
->key
.obj_type
, tp
.item
->key
.offset
, tp
.item
->size
, sizeof(CHUNK_ITEM
));
3248 c
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(chunk
), ALLOC_TAG
);
3251 ERR("out of memory\n");
3252 return STATUS_INSUFFICIENT_RESOURCES
;
3255 c
->size
= tp
.item
->size
;
3256 c
->offset
= tp
.item
->key
.offset
;
3257 c
->used
= c
->oldused
= 0;
3258 c
->cache
= c
->old_cache
= NULL
;
3260 c
->readonly
= FALSE
;
3262 c
->cache_loaded
= FALSE
;
3264 c
->space_changed
= FALSE
;
3267 c
->chunk_item
= ExAllocatePoolWithTag(NonPagedPool
, tp
.item
->size
, ALLOC_TAG
);
3269 if (!c
->chunk_item
) {
3270 ERR("out of memory\n");
3272 return STATUS_INSUFFICIENT_RESOURCES
;
3275 RtlCopyMemory(c
->chunk_item
, tp
.item
->data
, tp
.item
->size
);
3277 if (c
->chunk_item
->type
& BLOCK_FLAG_DATA
&& c
->chunk_item
->type
> Vcb
->data_flags
)
3278 Vcb
->data_flags
= c
->chunk_item
->type
;
3280 if (c
->chunk_item
->type
& BLOCK_FLAG_METADATA
&& c
->chunk_item
->type
> Vcb
->metadata_flags
)
3281 Vcb
->metadata_flags
= c
->chunk_item
->type
;
3283 if (c
->chunk_item
->type
& BLOCK_FLAG_SYSTEM
&& c
->chunk_item
->type
> Vcb
->system_flags
)
3284 Vcb
->system_flags
= c
->chunk_item
->type
;
3286 if (c
->chunk_item
->type
& BLOCK_FLAG_RAID10
) {
3287 if (c
->chunk_item
->sub_stripes
== 0 || c
->chunk_item
->sub_stripes
> c
->chunk_item
->num_stripes
) {
3288 ERR("chunk %llx: invalid stripes (num_stripes %u, sub_stripes %u)\n", c
->offset
, c
->chunk_item
->num_stripes
, c
->chunk_item
->sub_stripes
);
3289 ExFreePool(c
->chunk_item
);
3291 return STATUS_INTERNAL_ERROR
;
3295 if (c
->chunk_item
->num_stripes
> 0) {
3296 CHUNK_ITEM_STRIPE
* cis
= (CHUNK_ITEM_STRIPE
*)&c
->chunk_item
[1];
3299 c
->devices
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(device
*) * c
->chunk_item
->num_stripes
, ALLOC_TAG
);
3302 ERR("out of memory\n");
3303 ExFreePool(c
->chunk_item
);
3305 return STATUS_INSUFFICIENT_RESOURCES
;
3308 for (i
= 0; i
< c
->chunk_item
->num_stripes
; i
++) {
3309 c
->devices
[i
] = find_device_from_uuid(Vcb
, &cis
[i
].dev_uuid
);
3310 TRACE("device %llu = %p\n", i
, c
->devices
[i
]);
3312 if (!c
->devices
[i
]) {
3313 ERR("missing device\n");
3314 ExFreePool(c
->chunk_item
);
3316 return STATUS_INTERNAL_ERROR
;
3319 if (c
->devices
[i
]->readonly
)
3323 ERR("chunk %llx: number of stripes is 0\n", c
->offset
);
3324 ExFreePool(c
->chunk_item
);
3326 return STATUS_INTERNAL_ERROR
;
3329 ExInitializeResourceLite(&c
->lock
);
3330 ExInitializeResourceLite(&c
->changed_extents_lock
);
3332 InitializeListHead(&c
->space
);
3333 InitializeListHead(&c
->space_size
);
3334 InitializeListHead(&c
->deleting
);
3335 InitializeListHead(&c
->changed_extents
);
3337 InitializeListHead(&c
->range_locks
);
3338 ExInitializeResourceLite(&c
->range_locks_lock
);
3339 KeInitializeEvent(&c
->range_locks_event
, NotificationEvent
, FALSE
);
3341 InitializeListHead(&c
->partial_stripes
);
3342 ExInitializeResourceLite(&c
->partial_stripes_lock
);
3344 c
->last_alloc_set
= FALSE
;
3348 InsertTailList(&Vcb
->chunks
, &c
->list_entry
);
3350 c
->list_entry_balance
.Flink
= NULL
;
3354 b
= find_next_item(Vcb
, &tp
, &next_tp
, FALSE
, Irp
);
3360 Vcb
->log_to_phys_loaded
= TRUE
;
3362 if (Vcb
->data_flags
== 0)
3363 Vcb
->data_flags
= BLOCK_FLAG_DATA
| (Vcb
->superblock
.num_devices
> 1 ? BLOCK_FLAG_RAID0
: 0);
3365 if (Vcb
->metadata_flags
== 0)
3366 Vcb
->metadata_flags
= BLOCK_FLAG_METADATA
| (Vcb
->superblock
.num_devices
> 1 ? BLOCK_FLAG_RAID1
: BLOCK_FLAG_DUPLICATE
);
3368 if (Vcb
->system_flags
== 0)
3369 Vcb
->system_flags
= BLOCK_FLAG_SYSTEM
| (Vcb
->superblock
.num_devices
> 1 ? BLOCK_FLAG_RAID1
: BLOCK_FLAG_DUPLICATE
);
3371 if (Vcb
->superblock
.incompat_flags
& BTRFS_INCOMPAT_FLAGS_MIXED_GROUPS
) {
3372 Vcb
->metadata_flags
|= BLOCK_FLAG_DATA
;
3373 Vcb
->data_flags
= Vcb
->metadata_flags
;
3376 return STATUS_SUCCESS
;
3379 void protect_superblocks(_Inout_ chunk
* c
) {
3381 UINT64 off_start
, off_end
;
3383 // The Linux driver also protects all the space before the first superblock.
3384 // I realize this confuses physical and logical addresses, but this is what btrfs-progs does -
3385 // evidently Linux assumes the chunk at 0 is always SINGLE.
3386 if (c
->offset
< superblock_addrs
[0])
3387 space_list_subtract(c
, FALSE
, c
->offset
, superblock_addrs
[0] - c
->offset
, NULL
);
3389 while (superblock_addrs
[i
] != 0) {
3390 CHUNK_ITEM
* ci
= c
->chunk_item
;
3391 CHUNK_ITEM_STRIPE
* cis
= (CHUNK_ITEM_STRIPE
*)&ci
[1];
3393 if (ci
->type
& BLOCK_FLAG_RAID0
|| ci
->type
& BLOCK_FLAG_RAID10
) {
3394 for (j
= 0; j
< ci
->num_stripes
; j
++) {
3395 UINT16 sub_stripes
= max(ci
->sub_stripes
, 1);
3397 if (cis
[j
].offset
+ (ci
->size
* ci
->num_stripes
/ sub_stripes
) > superblock_addrs
[i
] && cis
[j
].offset
<= superblock_addrs
[i
] + sizeof(superblock
)) {
3400 UINT16 startoffstripe
;
3403 TRACE("cut out superblock in chunk %llx\n", c
->offset
);
3405 off_start
= superblock_addrs
[i
] - cis
[j
].offset
;
3406 off_start
-= off_start
% ci
->stripe_length
;
3407 off_start
*= ci
->num_stripes
/ sub_stripes
;
3408 off_start
+= (j
/ sub_stripes
) * ci
->stripe_length
;
3410 off_end
= off_start
+ ci
->stripe_length
;
3413 get_raid0_offset(off_start
, ci
->stripe_length
, ci
->num_stripes
/ sub_stripes
, &startoff
, &startoffstripe
);
3414 TRACE("j = %u, startoffstripe = %u\n", j
, startoffstripe
);
3415 TRACE("startoff = %llx, superblock = %llx\n", startoff
+ cis
[j
].offset
, superblock_addrs
[i
]);
3418 space_list_subtract(c
, FALSE
, c
->offset
+ off_start
, off_end
- off_start
, NULL
);
3421 } else if (ci
->type
& BLOCK_FLAG_RAID5
) {
3422 UINT64 stripe_size
= ci
->size
/ (ci
->num_stripes
- 1);
3424 for (j
= 0; j
< ci
->num_stripes
; j
++) {
3425 if (cis
[j
].offset
+ stripe_size
> superblock_addrs
[i
] && cis
[j
].offset
<= superblock_addrs
[i
] + sizeof(superblock
)) {
3426 TRACE("cut out superblock in chunk %llx\n", c
->offset
);
3428 off_start
= superblock_addrs
[i
] - cis
[j
].offset
;
3429 off_start
-= off_start
% ci
->stripe_length
;
3430 off_start
*= ci
->num_stripes
- 1;
3432 off_end
= sector_align(superblock_addrs
[i
] - cis
[j
].offset
+ sizeof(superblock
), ci
->stripe_length
);
3433 off_end
*= ci
->num_stripes
- 1;
3435 TRACE("cutting out %llx, size %llx\n", c
->offset
+ off_start
, off_end
- off_start
);
3437 space_list_subtract(c
, FALSE
, c
->offset
+ off_start
, off_end
- off_start
, NULL
);
3440 } else if (ci
->type
& BLOCK_FLAG_RAID6
) {
3441 UINT64 stripe_size
= ci
->size
/ (ci
->num_stripes
- 2);
3443 for (j
= 0; j
< ci
->num_stripes
; j
++) {
3444 if (cis
[j
].offset
+ stripe_size
> superblock_addrs
[i
] && cis
[j
].offset
<= superblock_addrs
[i
] + sizeof(superblock
)) {
3445 TRACE("cut out superblock in chunk %llx\n", c
->offset
);
3447 off_start
= superblock_addrs
[i
] - cis
[j
].offset
;
3448 off_start
-= off_start
% ci
->stripe_length
;
3449 off_start
*= ci
->num_stripes
- 2;
3451 off_end
= sector_align(superblock_addrs
[i
] - cis
[j
].offset
+ sizeof(superblock
), ci
->stripe_length
);
3452 off_end
*= ci
->num_stripes
- 2;
3454 TRACE("cutting out %llx, size %llx\n", c
->offset
+ off_start
, off_end
- off_start
);
3456 space_list_subtract(c
, FALSE
, c
->offset
+ off_start
, off_end
- off_start
, NULL
);
3459 } else { // SINGLE, DUPLICATE, RAID1
3460 for (j
= 0; j
< ci
->num_stripes
; j
++) {
3461 if (cis
[j
].offset
+ ci
->size
> superblock_addrs
[i
] && cis
[j
].offset
<= superblock_addrs
[i
] + sizeof(superblock
)) {
3462 TRACE("cut out superblock in chunk %llx\n", c
->offset
);
3464 // The Linux driver protects the whole stripe in which the superblock lives
3466 off_start
= ((superblock_addrs
[i
] - cis
[j
].offset
) / c
->chunk_item
->stripe_length
) * c
->chunk_item
->stripe_length
;
3467 off_end
= sector_align(superblock_addrs
[i
] - cis
[j
].offset
+ sizeof(superblock
), c
->chunk_item
->stripe_length
);
3469 space_list_subtract(c
, FALSE
, c
->offset
+ off_start
, off_end
- off_start
, NULL
);
3478 NTSTATUS
find_chunk_usage(_In_
_Requires_lock_held_(_Curr_
->tree_lock
) device_extension
* Vcb
, _In_opt_ PIRP Irp
) {
3479 LIST_ENTRY
* le
= Vcb
->chunks
.Flink
;
3483 BLOCK_GROUP_ITEM
* bgi
;
3486 searchkey
.obj_type
= TYPE_BLOCK_GROUP_ITEM
;
3488 while (le
!= &Vcb
->chunks
) {
3489 c
= CONTAINING_RECORD(le
, chunk
, list_entry
);
3491 searchkey
.obj_id
= c
->offset
;
3492 searchkey
.offset
= c
->chunk_item
->size
;
3494 Status
= find_item(Vcb
, Vcb
->extent_root
, &tp
, &searchkey
, FALSE
, Irp
);
3495 if (!NT_SUCCESS(Status
)) {
3496 ERR("error - find_item returned %08x\n", Status
);
3500 if (!keycmp(searchkey
, tp
.item
->key
)) {
3501 if (tp
.item
->size
>= sizeof(BLOCK_GROUP_ITEM
)) {
3502 bgi
= (BLOCK_GROUP_ITEM
*)tp
.item
->data
;
3504 c
->used
= c
->oldused
= bgi
->used
;
3506 TRACE("chunk %llx has %llx bytes used\n", c
->offset
, c
->used
);
3508 ERR("(%llx;%llx,%x,%llx) is %u bytes, expected %u\n",
3509 Vcb
->extent_root
->id
, tp
.item
->key
.obj_id
, tp
.item
->key
.obj_type
, tp
.item
->key
.offset
, tp
.item
->size
, sizeof(BLOCK_GROUP_ITEM
));
3516 Vcb
->chunk_usage_found
= TRUE
;
3518 return STATUS_SUCCESS
;
3521 static NTSTATUS
load_sys_chunks(_In_ device_extension
* Vcb
) {
3523 ULONG n
= Vcb
->superblock
.n
;
3526 if (n
> sizeof(KEY
)) {
3527 RtlCopyMemory(&key
, &Vcb
->superblock
.sys_chunk_array
[Vcb
->superblock
.n
- n
], sizeof(KEY
));
3530 return STATUS_SUCCESS
;
3532 TRACE("bootstrap: %llx,%x,%llx\n", key
.obj_id
, key
.obj_type
, key
.offset
);
3534 if (key
.obj_type
== TYPE_CHUNK_ITEM
) {
3539 if (n
< sizeof(CHUNK_ITEM
))
3540 return STATUS_SUCCESS
;
3542 ci
= (CHUNK_ITEM
*)&Vcb
->superblock
.sys_chunk_array
[Vcb
->superblock
.n
- n
];
3543 cisize
= sizeof(CHUNK_ITEM
) + (ci
->num_stripes
* sizeof(CHUNK_ITEM_STRIPE
));
3546 return STATUS_SUCCESS
;
3548 sc
= ExAllocatePoolWithTag(PagedPool
, sizeof(sys_chunk
), ALLOC_TAG
);
3551 ERR("out of memory\n");
3552 return STATUS_INSUFFICIENT_RESOURCES
;
3557 sc
->data
= ExAllocatePoolWithTag(PagedPool
, sc
->size
, ALLOC_TAG
);
3560 ERR("out of memory\n");
3562 return STATUS_INSUFFICIENT_RESOURCES
;
3565 RtlCopyMemory(sc
->data
, ci
, sc
->size
);
3566 InsertTailList(&Vcb
->sys_chunks
, &sc
->list_entry
);
3570 ERR("unexpected item %llx,%x,%llx in bootstrap\n", key
.obj_id
, key
.obj_type
, key
.offset
);
3571 return STATUS_INTERNAL_ERROR
;
3575 return STATUS_SUCCESS
;
3579 static root
* find_default_subvol(_In_
_Requires_lock_held_(_Curr_
->tree_lock
) device_extension
* Vcb
, _In_opt_ PIRP Irp
) {
3582 static char fn
[] = "default";
3583 static UINT32 crc32
= 0x8dbfc2d2;
3585 if (Vcb
->options
.subvol_id
!= 0) {
3586 le
= Vcb
->roots
.Flink
;
3587 while (le
!= &Vcb
->roots
) {
3588 root
* r
= CONTAINING_RECORD(le
, root
, list_entry
);
3590 if (r
->id
== Vcb
->options
.subvol_id
)
3597 if (Vcb
->superblock
.incompat_flags
& BTRFS_INCOMPAT_FLAGS_DEFAULT_SUBVOL
) {
3603 searchkey
.obj_id
= Vcb
->superblock
.root_dir_objectid
;
3604 searchkey
.obj_type
= TYPE_DIR_ITEM
;
3605 searchkey
.offset
= crc32
;
3607 Status
= find_item(Vcb
, Vcb
->root_root
, &tp
, &searchkey
, FALSE
, Irp
);
3608 if (!NT_SUCCESS(Status
)) {
3609 ERR("error - find_item returned %08x\n", Status
);
3613 if (keycmp(tp
.item
->key
, searchkey
)) {
3614 ERR("could not find (%llx,%x,%llx) in root tree\n", searchkey
.obj_id
, searchkey
.obj_type
, searchkey
.offset
);
3618 if (tp
.item
->size
< sizeof(DIR_ITEM
)) {
3619 ERR("(%llx,%x,%llx) was %u bytes, expected at least %u\n", tp
.item
->key
.obj_id
, tp
.item
->key
.obj_type
, tp
.item
->key
.offset
, tp
.item
->size
, sizeof(DIR_ITEM
));
3623 di
= (DIR_ITEM
*)tp
.item
->data
;
3625 if (tp
.item
->size
< sizeof(DIR_ITEM
) - 1 + di
->n
) {
3626 ERR("(%llx,%x,%llx) was %u bytes, expected %u\n", tp
.item
->key
.obj_id
, tp
.item
->key
.obj_type
, tp
.item
->key
.offset
, tp
.item
->size
, sizeof(DIR_ITEM
) - 1 + di
->n
);
3630 if (di
->n
!= strlen(fn
) || RtlCompareMemory(di
->name
, fn
, di
->n
) != di
->n
) {
3631 ERR("root DIR_ITEM had same CRC32, but was not \"default\"\n");
3635 if (di
->key
.obj_type
!= TYPE_ROOT_ITEM
) {
3636 ERR("default root has key (%llx,%x,%llx), expected subvolume\n", di
->key
.obj_id
, di
->key
.obj_type
, di
->key
.offset
);
3640 le
= Vcb
->roots
.Flink
;
3641 while (le
!= &Vcb
->roots
) {
3642 root
* r
= CONTAINING_RECORD(le
, root
, list_entry
);
3644 if (r
->id
== di
->key
.obj_id
)
3650 ERR("could not find root %llx, using default instead\n", di
->key
.obj_id
);
3654 le
= Vcb
->roots
.Flink
;
3655 while (le
!= &Vcb
->roots
) {
3656 root
* r
= CONTAINING_RECORD(le
, root
, list_entry
);
3658 if (r
->id
== BTRFS_ROOT_FSTREE
)
3667 void init_file_cache(_In_ PFILE_OBJECT FileObject
, _In_ CC_FILE_SIZES
* ccfs
) {
3668 TRACE("(%p, %p)\n", FileObject
, ccfs
);
3670 CcInitializeCacheMap(FileObject
, ccfs
, FALSE
, cache_callbacks
, FileObject
);
3673 fCcSetAdditionalCacheAttributesEx(FileObject
, CC_ENABLE_DISK_IO_ACCOUNTING
);
3675 CcSetReadAheadGranularity(FileObject
, READ_AHEAD_GRANULARITY
);
3678 static NTSTATUS
create_calc_threads(_In_ PDEVICE_OBJECT DeviceObject
) {
3679 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
3682 Vcb
->calcthreads
.num_threads
= KeQueryActiveProcessorCount(NULL
);
3684 Vcb
->calcthreads
.threads
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(drv_calc_thread
) * Vcb
->calcthreads
.num_threads
, ALLOC_TAG
);
3685 if (!Vcb
->calcthreads
.threads
) {
3686 ERR("out of memory\n");
3687 return STATUS_INSUFFICIENT_RESOURCES
;
3690 InitializeListHead(&Vcb
->calcthreads
.job_list
);
3691 ExInitializeResourceLite(&Vcb
->calcthreads
.lock
);
3692 KeInitializeEvent(&Vcb
->calcthreads
.event
, NotificationEvent
, FALSE
);
3694 RtlZeroMemory(Vcb
->calcthreads
.threads
, sizeof(drv_calc_thread
) * Vcb
->calcthreads
.num_threads
);
3696 for (i
= 0; i
< Vcb
->calcthreads
.num_threads
; i
++) {
3699 Vcb
->calcthreads
.threads
[i
].DeviceObject
= DeviceObject
;
3700 KeInitializeEvent(&Vcb
->calcthreads
.threads
[i
].finished
, NotificationEvent
, FALSE
);
3702 Status
= PsCreateSystemThread(&Vcb
->calcthreads
.threads
[i
].handle
, 0, NULL
, NULL
, NULL
, calc_thread
, &Vcb
->calcthreads
.threads
[i
]);
3703 if (!NT_SUCCESS(Status
)) {
3706 ERR("PsCreateSystemThread returned %08x\n", Status
);
3708 for (j
= 0; j
< i
; j
++) {
3709 Vcb
->calcthreads
.threads
[i
].quit
= TRUE
;
3712 KeSetEvent(&Vcb
->calcthreads
.event
, 0, FALSE
);
3718 return STATUS_SUCCESS
;
3721 static BOOL
is_btrfs_volume(_In_ PDEVICE_OBJECT DeviceObject
) {
3723 MOUNTDEV_NAME mdn
, *mdn2
;
3726 Status
= dev_ioctl(DeviceObject
, IOCTL_MOUNTDEV_QUERY_DEVICE_NAME
, NULL
, 0, &mdn
, sizeof(MOUNTDEV_NAME
), TRUE
, NULL
);
3727 if (!NT_SUCCESS(Status
) && Status
!= STATUS_BUFFER_OVERFLOW
) {
3728 ERR("IOCTL_MOUNTDEV_QUERY_DEVICE_NAME returned %08x\n", Status
);
3732 mdnsize
= (ULONG
)offsetof(MOUNTDEV_NAME
, Name
[0]) + mdn
.NameLength
;
3734 mdn2
= ExAllocatePoolWithTag(PagedPool
, mdnsize
, ALLOC_TAG
);
3736 ERR("out of memory\n");
3740 Status
= dev_ioctl(DeviceObject
, IOCTL_MOUNTDEV_QUERY_DEVICE_NAME
, NULL
, 0, mdn2
, mdnsize
, TRUE
, NULL
);
3741 if (!NT_SUCCESS(Status
)) {
3742 ERR("IOCTL_MOUNTDEV_QUERY_DEVICE_NAME returned %08x\n", Status
);
3747 if (mdn2
->NameLength
> wcslen(BTRFS_VOLUME_PREFIX
) * sizeof(WCHAR
) &&
3748 RtlCompareMemory(mdn2
->Name
, BTRFS_VOLUME_PREFIX
, wcslen(BTRFS_VOLUME_PREFIX
) * sizeof(WCHAR
)) == wcslen(BTRFS_VOLUME_PREFIX
) * sizeof(WCHAR
)) {
3758 static NTSTATUS
get_device_pnp_name_guid(_In_ PDEVICE_OBJECT DeviceObject
, _Out_ PUNICODE_STRING pnp_name
, _In_
const GUID
* guid
) {
3760 WCHAR
*list
= NULL
, *s
;
3762 Status
= IoGetDeviceInterfaces((PVOID
)guid
, NULL
, 0, &list
);
3763 if (!NT_SUCCESS(Status
)) {
3764 ERR("IoGetDeviceInterfaces returned %08x\n", Status
);
3770 PFILE_OBJECT FileObject
;
3771 PDEVICE_OBJECT devobj
;
3772 UNICODE_STRING name
;
3774 name
.Length
= name
.MaximumLength
= (USHORT
)wcslen(s
) * sizeof(WCHAR
);
3777 if (NT_SUCCESS(IoGetDeviceObjectPointer(&name
, FILE_READ_ATTRIBUTES
, &FileObject
, &devobj
))) {
3778 if (DeviceObject
== devobj
|| DeviceObject
== FileObject
->DeviceObject
) {
3779 ObDereferenceObject(FileObject
);
3781 pnp_name
->Buffer
= ExAllocatePoolWithTag(PagedPool
, name
.Length
, ALLOC_TAG
);
3782 if (!pnp_name
->Buffer
) {
3783 ERR("out of memory\n");
3784 Status
= STATUS_INSUFFICIENT_RESOURCES
;
3788 RtlCopyMemory(pnp_name
->Buffer
, name
.Buffer
, name
.Length
);
3789 pnp_name
->Length
= pnp_name
->MaximumLength
= name
.Length
;
3791 Status
= STATUS_SUCCESS
;
3795 ObDereferenceObject(FileObject
);
3798 s
= &s
[wcslen(s
) + 1];
3801 pnp_name
->Length
= pnp_name
->MaximumLength
= 0;
3802 pnp_name
->Buffer
= 0;
3804 Status
= STATUS_NOT_FOUND
;
3813 NTSTATUS
get_device_pnp_name(_In_ PDEVICE_OBJECT DeviceObject
, _Out_ PUNICODE_STRING pnp_name
, _Out_
const GUID
** guid
) {
3816 Status
= get_device_pnp_name_guid(DeviceObject
, pnp_name
, &GUID_DEVINTERFACE_VOLUME
);
3817 if (NT_SUCCESS(Status
)) {
3818 *guid
= &GUID_DEVINTERFACE_VOLUME
;
3822 Status
= get_device_pnp_name_guid(DeviceObject
, pnp_name
, &GUID_DEVINTERFACE_HIDDEN_VOLUME
);
3823 if (NT_SUCCESS(Status
)) {
3824 *guid
= &GUID_DEVINTERFACE_HIDDEN_VOLUME
;
3828 Status
= get_device_pnp_name_guid(DeviceObject
, pnp_name
, &GUID_DEVINTERFACE_DISK
);
3829 if (NT_SUCCESS(Status
)) {
3830 *guid
= &GUID_DEVINTERFACE_DISK
;
3834 return STATUS_NOT_FOUND
;
3837 _Success_(return>=0)
3838 static NTSTATUS
check_mount_device(_In_ PDEVICE_OBJECT DeviceObject
, _Out_ BOOL
* no_pnp
) {
3843 UNICODE_STRING pnp_name
;
3846 to_read
= DeviceObject
->SectorSize
== 0 ? sizeof(superblock
) : (ULONG
)sector_align(sizeof(superblock
), DeviceObject
->SectorSize
);
3848 sb
= ExAllocatePoolWithTag(NonPagedPool
, to_read
, ALLOC_TAG
);
3850 ERR("out of memory\n");
3851 return STATUS_INSUFFICIENT_RESOURCES
;
3854 Status
= sync_read_phys(DeviceObject
, superblock_addrs
[0], to_read
, (PUCHAR
)sb
, TRUE
);
3855 if (!NT_SUCCESS(Status
)) {
3856 ERR("sync_read_phys returned %08x\n", Status
);
3860 if (sb
->magic
!= BTRFS_MAGIC
) {
3861 Status
= STATUS_SUCCESS
;
3865 crc32
= ~calc_crc32c(0xffffffff, (UINT8
*)&sb
->uuid
, (ULONG
)sizeof(superblock
) - sizeof(sb
->checksum
));
3867 if (crc32
!= *((UINT32
*)sb
->checksum
)) {
3868 WARN("crc32 was %08x, expected %08x\n", crc32
, *((UINT32
*)sb
->checksum
));
3869 Status
= STATUS_SUCCESS
;
3873 DeviceObject
->Flags
&= ~DO_VERIFY_VOLUME
;
3875 pnp_name
.Buffer
= NULL
;
3877 Status
= get_device_pnp_name(DeviceObject
, &pnp_name
, &guid
);
3878 if (!NT_SUCCESS(Status
)) {
3879 WARN("get_device_pnp_name returned %08x\n", Status
);
3880 pnp_name
.Length
= 0;
3883 if (pnp_name
.Length
== 0)
3887 volume_arrival(drvobj
, &pnp_name
);
3890 if (pnp_name
.Buffer
)
3891 ExFreePool(pnp_name
.Buffer
);
3893 Status
= STATUS_SUCCESS
;
3901 static BOOL
still_has_superblock(_In_ PDEVICE_OBJECT device
) {
3905 PDEVICE_OBJECT device2
;
3910 to_read
= device
->SectorSize
== 0 ? sizeof(superblock
) : (ULONG
)sector_align(sizeof(superblock
), device
->SectorSize
);
3912 sb
= ExAllocatePoolWithTag(NonPagedPool
, to_read
, ALLOC_TAG
);
3914 ERR("out of memory\n");
3918 Status
= sync_read_phys(device
, superblock_addrs
[0], to_read
, (PUCHAR
)sb
, TRUE
);
3919 if (!NT_SUCCESS(Status
)) {
3920 ERR("Failed to read superblock: %08x\n", Status
);
3925 if (sb
->magic
!= BTRFS_MAGIC
) {
3926 TRACE("not a BTRFS volume\n");
3930 UINT32 crc32
= ~calc_crc32c(0xffffffff, (UINT8
*)&sb
->uuid
, (ULONG
)sizeof(superblock
) - sizeof(sb
->checksum
));
3932 if (crc32
!= *((UINT32
*)sb
->checksum
)) {
3933 WARN("crc32 was %08x, expected %08x\n", crc32
, *((UINT32
*)sb
->checksum
));
3942 device2
->Flags
&= ~DO_VERIFY_VOLUME
;
3943 device2
= IoGetLowerDeviceObject(device2
);
3950 static NTSTATUS
mount_vol(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
3951 PIO_STACK_LOCATION IrpSp
;
3952 PDEVICE_OBJECT NewDeviceObject
= NULL
;
3953 PDEVICE_OBJECT DeviceToMount
, readobj
;
3955 device_extension
* Vcb
= NULL
;
3956 LIST_ENTRY
*le
, batchlist
;
3959 fcb
* root_fcb
= NULL
;
3960 ccb
* root_ccb
= NULL
;
3961 BOOL init_lookaside
= FALSE
;
3963 volume_device_extension
* vde
= NULL
;
3964 pdo_device_extension
* pdode
= NULL
;
3966 BOOL no_pnp
= FALSE
;
3969 TRACE("(%p, %p)\n", DeviceObject
, Irp
);
3971 if (DeviceObject
!= master_devobj
) {
3972 Status
= STATUS_INVALID_DEVICE_REQUEST
;
3976 IrpSp
= IoGetCurrentIrpStackLocation(Irp
);
3977 DeviceToMount
= IrpSp
->Parameters
.MountVolume
.DeviceObject
;
3979 if (!is_btrfs_volume(DeviceToMount
)) {
3980 Status
= check_mount_device(DeviceToMount
, &no_pnp
);
3981 if (!NT_SUCCESS(Status
))
3982 WARN("check_mount_device returned %08x\n", Status
);
3985 Status
= STATUS_UNRECOGNIZED_VOLUME
;
3991 pdo
= DeviceToMount
;
3993 while (IoGetLowerDeviceObject(pdo
)) {
3994 pdo
= IoGetLowerDeviceObject(pdo
);
3997 ExAcquireResourceSharedLite(&pdo_list_lock
, TRUE
);
3999 le
= pdo_list
.Flink
;
4000 while (le
!= &pdo_list
) {
4001 pdo_device_extension
* pdode
= CONTAINING_RECORD(le
, pdo_device_extension
, list_entry
);
4003 if (pdode
->pdo
== pdo
) {
4011 ExReleaseResourceLite(&pdo_list_lock
);
4013 if (!vde
|| vde
->type
!= VCB_TYPE_VOLUME
) {
4015 Status
= STATUS_UNRECOGNIZED_VOLUME
;
4023 ExAcquireResourceExclusiveLite(&pdode
->child_lock
, TRUE
);
4025 le
= pdode
->children
.Flink
;
4026 while (le
!= &pdode
->children
) {
4027 LIST_ENTRY
* le2
= le
->Flink
;
4029 vc
= CONTAINING_RECORD(pdode
->children
.Flink
, volume_child
, list_entry
);
4031 if (!still_has_superblock(vc
->devobj
)) {
4032 remove_volume_child(vde
, vc
, FALSE
);
4034 if (pdode
->num_children
== 0) {
4035 ERR("error - number of devices is zero\n");
4036 Status
= STATUS_INTERNAL_ERROR
;
4040 Status
= STATUS_DEVICE_NOT_READY
;
4047 if (pdode
->num_children
== 0 || pdode
->children_loaded
== 0) {
4048 ERR("error - number of devices is zero\n");
4049 Status
= STATUS_INTERNAL_ERROR
;
4053 ExConvertExclusiveToSharedLite(&pdode
->child_lock
);
4055 vc
= CONTAINING_RECORD(pdode
->children
.Flink
, volume_child
, list_entry
);
4057 readobj
= vc
->devobj
;
4058 readobjsize
= vc
->size
;
4060 vde
->device
->Characteristics
&= ~FILE_DEVICE_SECURE_OPEN
;
4062 GET_LENGTH_INFORMATION gli
;
4065 readobj
= DeviceToMount
;
4067 Status
= dev_ioctl(readobj
, IOCTL_DISK_GET_LENGTH_INFO
, NULL
, 0,
4068 &gli
, sizeof(gli
), TRUE
, NULL
);
4070 if (!NT_SUCCESS(Status
)) {
4071 ERR("error reading length information: %08x\n", Status
);
4075 readobjsize
= gli
.Length
.QuadPart
;
4078 Status
= IoCreateDevice(drvobj
, sizeof(device_extension
), NULL
, FILE_DEVICE_DISK_FILE_SYSTEM
, 0, FALSE
, &NewDeviceObject
);
4079 if (!NT_SUCCESS(Status
)) {
4080 ERR("IoCreateDevice returned %08x\n", Status
);
4081 Status
= STATUS_UNRECOGNIZED_VOLUME
;
4085 NewDeviceObject
->Flags
|= DO_DIRECT_IO
;
4087 // Some programs seem to expect that the sector size will be 512, for
4088 // FILE_NO_INTERMEDIATE_BUFFERING and the like.
4089 NewDeviceObject
->SectorSize
= min(DeviceToMount
->SectorSize
, 512);
4091 Vcb
= (PVOID
)NewDeviceObject
->DeviceExtension
;
4092 RtlZeroMemory(Vcb
, sizeof(device_extension
));
4093 Vcb
->type
= VCB_TYPE_FS
;
4096 ExInitializeResourceLite(&Vcb
->tree_lock
);
4097 Vcb
->need_write
= FALSE
;
4099 ExInitializeResourceLite(&Vcb
->fcb_lock
);
4100 ExInitializeResourceLite(&Vcb
->chunk_lock
);
4101 ExInitializeResourceLite(&Vcb
->dirty_fcbs_lock
);
4102 ExInitializeResourceLite(&Vcb
->dirty_filerefs_lock
);
4103 ExInitializeResourceLite(&Vcb
->dirty_subvols_lock
);
4104 ExInitializeResourceLite(&Vcb
->scrub
.stats_lock
);
4106 ExInitializeResourceLite(&Vcb
->load_lock
);
4107 ExAcquireResourceExclusiveLite(&Vcb
->load_lock
, TRUE
);
4109 ExAcquireResourceExclusiveLite(&Vcb
->tree_lock
, TRUE
);
4111 DeviceToMount
->Flags
|= DO_DIRECT_IO
;
4113 Status
= read_superblock(Vcb
, readobj
, readobjsize
);
4114 if (!NT_SUCCESS(Status
)) {
4115 if (!IoIsErrorUserInduced(Status
))
4116 Status
= STATUS_UNRECOGNIZED_VOLUME
;
4117 else if (Irp
->Tail
.Overlay
.Thread
)
4118 IoSetHardErrorOrVerifyDevice(Irp
, readobj
);
4123 if (!vde
&& Vcb
->superblock
.num_devices
> 1) {
4124 ERR("cannot mount multi-device FS with non-PNP device\n");
4125 Status
= STATUS_UNRECOGNIZED_VOLUME
;
4129 Status
= registry_load_volume_options(Vcb
);
4130 if (!NT_SUCCESS(Status
)) {
4131 ERR("registry_load_volume_options returned %08x\n", Status
);
4135 if (pdode
&& pdode
->children_loaded
< pdode
->num_children
&& (!Vcb
->options
.allow_degraded
|| !finished_probing
|| degraded_wait
)) {
4136 ERR("could not mount as %u device(s) missing\n", pdode
->num_children
- pdode
->children_loaded
);
4137 Status
= STATUS_DEVICE_NOT_READY
;
4141 if (Vcb
->options
.ignore
) {
4142 TRACE("ignoring volume\n");
4143 Status
= STATUS_UNRECOGNIZED_VOLUME
;
4147 if (Vcb
->superblock
.incompat_flags
& ~INCOMPAT_SUPPORTED
) {
4148 WARN("cannot mount because of unsupported incompat flags (%llx)\n", Vcb
->superblock
.incompat_flags
& ~INCOMPAT_SUPPORTED
);
4149 Status
= STATUS_UNRECOGNIZED_VOLUME
;
4153 Vcb
->readonly
= FALSE
;
4154 if (Vcb
->superblock
.compat_ro_flags
& ~COMPAT_RO_SUPPORTED
) {
4155 WARN("mounting read-only because of unsupported flags (%llx)\n", Vcb
->superblock
.compat_ro_flags
& ~COMPAT_RO_SUPPORTED
);
4156 Vcb
->readonly
= TRUE
;
4159 if (Vcb
->options
.readonly
)
4160 Vcb
->readonly
= TRUE
;
4162 Vcb
->superblock
.generation
++;
4163 Vcb
->superblock
.incompat_flags
|= BTRFS_INCOMPAT_FLAGS_MIXED_BACKREF
;
4165 InitializeListHead(&Vcb
->devices
);
4166 dev
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(device
), ALLOC_TAG
);
4168 ERR("out of memory\n");
4169 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4173 dev
->devobj
= readobj
;
4174 RtlCopyMemory(&dev
->devitem
, &Vcb
->superblock
.dev_item
, sizeof(DEV_ITEM
));
4176 if (dev
->devitem
.num_bytes
> readobjsize
) {
4177 WARN("device %llx: DEV_ITEM says %llx bytes, but Windows only reports %llx\n", dev
->devitem
.dev_id
,
4178 dev
->devitem
.num_bytes
, readobjsize
);
4180 dev
->devitem
.num_bytes
= readobjsize
;
4183 dev
->seeding
= Vcb
->superblock
.flags
& BTRFS_SUPERBLOCK_FLAGS_SEEDING
? TRUE
: FALSE
;
4185 init_device(Vcb
, dev
, TRUE
);
4187 InsertTailList(&Vcb
->devices
, &dev
->list_entry
);
4188 Vcb
->devices_loaded
= 1;
4190 if (DeviceToMount
->Flags
& DO_SYSTEM_BOOT_PARTITION
)
4191 Vcb
->disallow_dismount
= TRUE
;
4193 TRACE("DeviceToMount = %p\n", DeviceToMount
);
4194 TRACE("IrpSp->Parameters.MountVolume.Vpb = %p\n", IrpSp
->Parameters
.MountVolume
.Vpb
);
4196 NewDeviceObject
->StackSize
= DeviceToMount
->StackSize
+ 1;
4197 NewDeviceObject
->Flags
&= ~DO_DEVICE_INITIALIZING
;
4199 InitializeListHead(&Vcb
->roots
);
4200 InitializeListHead(&Vcb
->drop_roots
);
4202 Vcb
->log_to_phys_loaded
= FALSE
;
4204 add_root(Vcb
, BTRFS_ROOT_CHUNK
, Vcb
->superblock
.chunk_tree_addr
, Vcb
->superblock
.chunk_root_generation
, NULL
);
4206 if (!Vcb
->chunk_root
) {
4207 ERR("Could not load chunk root.\n");
4208 Status
= STATUS_INTERNAL_ERROR
;
4212 InitializeListHead(&Vcb
->sys_chunks
);
4213 Status
= load_sys_chunks(Vcb
);
4214 if (!NT_SUCCESS(Status
)) {
4215 ERR("load_sys_chunks returned %08x\n", Status
);
4219 InitializeListHead(&Vcb
->chunks
);
4220 InitializeListHead(&Vcb
->trees
);
4221 InitializeListHead(&Vcb
->trees_hash
);
4222 InitializeListHead(&Vcb
->all_fcbs
);
4223 InitializeListHead(&Vcb
->dirty_fcbs
);
4224 InitializeListHead(&Vcb
->dirty_filerefs
);
4225 InitializeListHead(&Vcb
->dirty_subvols
);
4226 InitializeListHead(&Vcb
->send_ops
);
4228 InitializeListHead(&Vcb
->DirNotifyList
);
4229 InitializeListHead(&Vcb
->scrub
.errors
);
4231 FsRtlNotifyInitializeSync(&Vcb
->NotifySync
);
4233 ExInitializePagedLookasideList(&Vcb
->tree_data_lookaside
, NULL
, NULL
, 0, sizeof(tree_data
), ALLOC_TAG
, 0);
4234 ExInitializePagedLookasideList(&Vcb
->traverse_ptr_lookaside
, NULL
, NULL
, 0, sizeof(traverse_ptr
), ALLOC_TAG
, 0);
4235 ExInitializePagedLookasideList(&Vcb
->batch_item_lookaside
, NULL
, NULL
, 0, sizeof(batch_item
), ALLOC_TAG
, 0);
4236 ExInitializePagedLookasideList(&Vcb
->fileref_lookaside
, NULL
, NULL
, 0, sizeof(file_ref
), ALLOC_TAG
, 0);
4237 ExInitializePagedLookasideList(&Vcb
->fcb_lookaside
, NULL
, NULL
, 0, sizeof(fcb
), ALLOC_TAG
, 0);
4238 ExInitializePagedLookasideList(&Vcb
->name_bit_lookaside
, NULL
, NULL
, 0, sizeof(name_bit
), ALLOC_TAG
, 0);
4239 ExInitializeNPagedLookasideList(&Vcb
->range_lock_lookaside
, NULL
, NULL
, 0, sizeof(range_lock
), ALLOC_TAG
, 0);
4240 ExInitializeNPagedLookasideList(&Vcb
->fileref_np_lookaside
, NULL
, NULL
, 0, sizeof(file_ref_nonpaged
), ALLOC_TAG
, 0);
4241 ExInitializeNPagedLookasideList(&Vcb
->fcb_np_lookaside
, NULL
, NULL
, 0, sizeof(fcb_nonpaged
), ALLOC_TAG
, 0);
4242 init_lookaside
= TRUE
;
4244 Vcb
->Vpb
= IrpSp
->Parameters
.MountVolume
.Vpb
;
4246 Status
= load_chunk_root(Vcb
, Irp
);
4247 if (!NT_SUCCESS(Status
)) {
4248 ERR("load_chunk_root returned %08x\n", Status
);
4252 if (Vcb
->superblock
.num_devices
> 1) {
4253 if (Vcb
->devices_loaded
< Vcb
->superblock
.num_devices
&& (!Vcb
->options
.allow_degraded
|| !finished_probing
)) {
4254 ERR("could not mount as %u device(s) missing\n", Vcb
->superblock
.num_devices
- Vcb
->devices_loaded
);
4256 IoRaiseInformationalHardError(IO_ERR_INTERNAL_ERROR
, NULL
, NULL
);
4258 Status
= STATUS_INTERNAL_ERROR
;
4262 if (dev
->readonly
&& !Vcb
->readonly
) {
4263 Vcb
->readonly
= TRUE
;
4265 le
= Vcb
->devices
.Flink
;
4266 while (le
!= &Vcb
->devices
) {
4267 device
* dev2
= CONTAINING_RECORD(le
, device
, list_entry
);
4269 if (dev2
->readonly
&& !dev2
->seeding
)
4272 if (!dev2
->readonly
) {
4273 Vcb
->readonly
= FALSE
;
4281 WARN("setting volume to readonly\n");
4284 if (dev
->readonly
) {
4285 WARN("setting volume to readonly as device is readonly\n");
4286 Vcb
->readonly
= TRUE
;
4290 add_root(Vcb
, BTRFS_ROOT_ROOT
, Vcb
->superblock
.root_tree_addr
, Vcb
->superblock
.generation
- 1, NULL
);
4292 if (!Vcb
->root_root
) {
4293 ERR("Could not load root of roots.\n");
4294 Status
= STATUS_INTERNAL_ERROR
;
4298 Status
= look_for_roots(Vcb
, Irp
);
4299 if (!NT_SUCCESS(Status
)) {
4300 ERR("look_for_roots returned %08x\n", Status
);
4304 if (!Vcb
->readonly
) {
4305 Status
= find_chunk_usage(Vcb
, Irp
);
4306 if (!NT_SUCCESS(Status
)) {
4307 ERR("find_chunk_usage returned %08x\n", Status
);
4312 InitializeListHead(&batchlist
);
4314 // We've already increased the generation by one
4315 if (!Vcb
->readonly
&& (
4316 Vcb
->options
.clear_cache
||
4317 (!(Vcb
->superblock
.compat_ro_flags
& BTRFS_COMPAT_RO_FLAGS_FREE_SPACE_CACHE
) && Vcb
->superblock
.generation
- 1 != Vcb
->superblock
.cache_generation
) ||
4318 (Vcb
->superblock
.compat_ro_flags
& BTRFS_COMPAT_RO_FLAGS_FREE_SPACE_CACHE
&& !(Vcb
->superblock
.compat_ro_flags
& BTRFS_COMPAT_RO_FLAGS_FREE_SPACE_CACHE_VALID
)))) {
4319 if (Vcb
->options
.clear_cache
)
4320 WARN("ClearCache option was set, clearing cache...\n");
4321 else if (Vcb
->superblock
.compat_ro_flags
& BTRFS_COMPAT_RO_FLAGS_FREE_SPACE_CACHE
&& !(Vcb
->superblock
.compat_ro_flags
& BTRFS_COMPAT_RO_FLAGS_FREE_SPACE_CACHE_VALID
))
4322 WARN("clearing free-space tree created by buggy Linux driver\n");
4324 WARN("generation was %llx, free-space cache generation was %llx; clearing cache...\n", Vcb
->superblock
.generation
- 1, Vcb
->superblock
.cache_generation
);
4326 Status
= clear_free_space_cache(Vcb
, &batchlist
, Irp
);
4327 if (!NT_SUCCESS(Status
)) {
4328 ERR("clear_free_space_cache returned %08x\n", Status
);
4329 clear_batch_list(Vcb
, &batchlist
);
4334 Status
= commit_batch_list(Vcb
, &batchlist
, Irp
);
4335 if (!NT_SUCCESS(Status
)) {
4336 ERR("commit_batch_list returned %08x\n", Status
);
4340 Vcb
->volume_fcb
= create_fcb(Vcb
, NonPagedPool
);
4341 if (!Vcb
->volume_fcb
) {
4342 ERR("out of memory\n");
4343 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4347 Vcb
->volume_fcb
->Vcb
= Vcb
;
4348 Vcb
->volume_fcb
->sd
= NULL
;
4350 Vcb
->dummy_fcb
= create_fcb(Vcb
, NonPagedPool
);
4351 if (!Vcb
->dummy_fcb
) {
4352 ERR("out of memory\n");
4353 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4357 Vcb
->dummy_fcb
->Vcb
= Vcb
;
4358 Vcb
->dummy_fcb
->type
= BTRFS_TYPE_DIRECTORY
;
4359 Vcb
->dummy_fcb
->inode
= 2;
4360 Vcb
->dummy_fcb
->subvol
= Vcb
->root_root
;
4361 Vcb
->dummy_fcb
->atts
= FILE_ATTRIBUTE_DIRECTORY
;
4362 Vcb
->dummy_fcb
->inode_item
.st_nlink
= 1;
4363 Vcb
->dummy_fcb
->inode_item
.st_mode
= __S_IFDIR
;
4365 Vcb
->dummy_fcb
->hash_ptrs
= ExAllocatePoolWithTag(PagedPool
, sizeof(LIST_ENTRY
*) * 256, ALLOC_TAG
);
4366 if (!Vcb
->dummy_fcb
->hash_ptrs
) {
4367 ERR("out of memory\n");
4368 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4372 RtlZeroMemory(Vcb
->dummy_fcb
->hash_ptrs
, sizeof(LIST_ENTRY
*) * 256);
4374 Vcb
->dummy_fcb
->hash_ptrs_uc
= ExAllocatePoolWithTag(PagedPool
, sizeof(LIST_ENTRY
*) * 256, ALLOC_TAG
);
4375 if (!Vcb
->dummy_fcb
->hash_ptrs_uc
) {
4376 ERR("out of memory\n");
4377 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4381 RtlZeroMemory(Vcb
->dummy_fcb
->hash_ptrs_uc
, sizeof(LIST_ENTRY
*) * 256);
4383 root_fcb
= create_fcb(Vcb
, NonPagedPool
);
4385 ERR("out of memory\n");
4386 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4390 root_fcb
->Vcb
= Vcb
;
4391 root_fcb
->inode
= SUBVOL_ROOT_INODE
;
4392 root_fcb
->type
= BTRFS_TYPE_DIRECTORY
;
4394 #ifdef DEBUG_FCB_REFCOUNTS
4395 WARN("volume FCB = %p\n", Vcb
->volume_fcb
);
4396 WARN("root FCB = %p\n", root_fcb
);
4399 root_fcb
->subvol
= find_default_subvol(Vcb
, Irp
);
4401 if (!root_fcb
->subvol
) {
4402 ERR("could not find top subvol\n");
4403 Status
= STATUS_INTERNAL_ERROR
;
4407 Status
= load_dir_children(Vcb
, root_fcb
, TRUE
, Irp
);
4408 if (!NT_SUCCESS(Status
)) {
4409 ERR("load_dir_children returned %08x\n", Status
);
4413 searchkey
.obj_id
= root_fcb
->inode
;
4414 searchkey
.obj_type
= TYPE_INODE_ITEM
;
4415 searchkey
.offset
= 0xffffffffffffffff;
4417 Status
= find_item(Vcb
, root_fcb
->subvol
, &tp
, &searchkey
, FALSE
, Irp
);
4418 if (!NT_SUCCESS(Status
)) {
4419 ERR("error - find_item returned %08x\n", Status
);
4423 if (tp
.item
->key
.obj_id
!= searchkey
.obj_id
|| tp
.item
->key
.obj_type
!= searchkey
.obj_type
) {
4424 ERR("couldn't find INODE_ITEM for root directory\n");
4425 Status
= STATUS_INTERNAL_ERROR
;
4429 if (tp
.item
->size
> 0)
4430 RtlCopyMemory(&root_fcb
->inode_item
, tp
.item
->data
, min(sizeof(INODE_ITEM
), tp
.item
->size
));
4432 fcb_get_sd(root_fcb
, NULL
, TRUE
, Irp
);
4434 root_fcb
->atts
= get_file_attributes(Vcb
, root_fcb
->subvol
, root_fcb
->inode
, root_fcb
->type
, FALSE
, FALSE
, Irp
);
4436 Vcb
->root_fileref
= create_fileref(Vcb
);
4437 if (!Vcb
->root_fileref
) {
4438 ERR("out of memory\n");
4439 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4443 Vcb
->root_fileref
->fcb
= root_fcb
;
4444 InsertTailList(&root_fcb
->subvol
->fcbs
, &root_fcb
->list_entry
);
4445 InsertTailList(&Vcb
->all_fcbs
, &root_fcb
->list_entry_all
);
4447 root_fcb
->fileref
= Vcb
->root_fileref
;
4449 root_ccb
= ExAllocatePoolWithTag(PagedPool
, sizeof(ccb
), ALLOC_TAG
);
4451 ERR("out of memory\n");
4452 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4456 Vcb
->root_file
= IoCreateStreamFileObject(NULL
, DeviceToMount
);
4457 Vcb
->root_file
->FsContext
= root_fcb
;
4458 Vcb
->root_file
->SectionObjectPointer
= &root_fcb
->nonpaged
->segment_object
;
4459 Vcb
->root_file
->Vpb
= DeviceObject
->Vpb
;
4461 RtlZeroMemory(root_ccb
, sizeof(ccb
));
4462 root_ccb
->NodeType
= BTRFS_NODE_TYPE_CCB
;
4463 root_ccb
->NodeSize
= sizeof(ccb
);
4465 Vcb
->root_file
->FsContext2
= root_ccb
;
4468 CcInitializeCacheMap(Vcb
->root_file
, (PCC_FILE_SIZES
)(&root_fcb
->Header
.AllocationSize
), FALSE
, cache_callbacks
, Vcb
->root_file
);
4469 } _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER
) {
4470 Status
= _SEH2_GetExceptionCode();
4474 le
= Vcb
->devices
.Flink
;
4475 while (le
!= &Vcb
->devices
) {
4476 device
* dev2
= CONTAINING_RECORD(le
, device
, list_entry
);
4478 Status
= find_disk_holes(Vcb
, dev2
, Irp
);
4479 if (!NT_SUCCESS(Status
)) {
4480 ERR("find_disk_holes returned %08x\n", Status
);
4487 NewDeviceObject
->Vpb
= IrpSp
->Parameters
.MountVolume
.Vpb
;
4488 IrpSp
->Parameters
.MountVolume
.Vpb
->DeviceObject
= NewDeviceObject
;
4489 IrpSp
->Parameters
.MountVolume
.Vpb
->Flags
|= VPB_MOUNTED
;
4490 NewDeviceObject
->Vpb
->VolumeLabelLength
= 4; // FIXME
4491 NewDeviceObject
->Vpb
->VolumeLabel
[0] = '?';
4492 NewDeviceObject
->Vpb
->VolumeLabel
[1] = 0;
4493 NewDeviceObject
->Vpb
->ReferenceCount
++; // FIXME - should we deref this at any point?
4495 KeInitializeEvent(&Vcb
->flush_thread_finished
, NotificationEvent
, FALSE
);
4497 Status
= PsCreateSystemThread(&Vcb
->flush_thread_handle
, 0, NULL
, NULL
, NULL
, flush_thread
, NewDeviceObject
);
4498 if (!NT_SUCCESS(Status
)) {
4499 ERR("PsCreateSystemThread returned %08x\n", Status
);
4503 Status
= create_calc_threads(NewDeviceObject
);
4504 if (!NT_SUCCESS(Status
)) {
4505 ERR("create_calc_threads returned %08x\n", Status
);
4509 Status
= registry_mark_volume_mounted(&Vcb
->superblock
.uuid
);
4510 if (!NT_SUCCESS(Status
))
4511 WARN("registry_mark_volume_mounted returned %08x\n", Status
);
4513 Status
= look_for_balance_item(Vcb
);
4514 if (!NT_SUCCESS(Status
) && Status
!= STATUS_NOT_FOUND
)
4515 WARN("look_for_balance_item returned %08x\n", Status
);
4517 Status
= STATUS_SUCCESS
;
4520 vde
->mounted_device
= NewDeviceObject
;
4522 ExInitializeResourceLite(&Vcb
->send_load_lock
);
4526 ExReleaseResourceLite(&pdode
->child_lock
);
4530 ExReleaseResourceLite(&Vcb
->tree_lock
);
4531 ExReleaseResourceLite(&Vcb
->load_lock
);
4534 if (!NT_SUCCESS(Status
)) {
4536 if (init_lookaside
) {
4537 ExDeletePagedLookasideList(&Vcb
->tree_data_lookaside
);
4538 ExDeletePagedLookasideList(&Vcb
->traverse_ptr_lookaside
);
4539 ExDeletePagedLookasideList(&Vcb
->batch_item_lookaside
);
4540 ExDeletePagedLookasideList(&Vcb
->fileref_lookaside
);
4541 ExDeletePagedLookasideList(&Vcb
->fcb_lookaside
);
4542 ExDeletePagedLookasideList(&Vcb
->name_bit_lookaside
);
4543 ExDeleteNPagedLookasideList(&Vcb
->range_lock_lookaside
);
4544 ExDeleteNPagedLookasideList(&Vcb
->fileref_np_lookaside
);
4545 ExDeleteNPagedLookasideList(&Vcb
->fcb_np_lookaside
);
4549 ObDereferenceObject(Vcb
->root_file
);
4550 else if (Vcb
->root_fileref
) {
4551 acquire_fcb_lock_exclusive(Vcb
);
4552 free_fileref(Vcb
, Vcb
->root_fileref
);
4553 release_fcb_lock(Vcb
);
4554 } else if (root_fcb
) {
4555 acquire_fcb_lock_exclusive(Vcb
);
4556 free_fcb(Vcb
, root_fcb
);
4557 release_fcb_lock(Vcb
);
4560 if (Vcb
->volume_fcb
) {
4561 acquire_fcb_lock_exclusive(Vcb
);
4562 free_fcb(Vcb
, Vcb
->volume_fcb
);
4563 release_fcb_lock(Vcb
);
4566 ExDeleteResourceLite(&Vcb
->tree_lock
);
4567 ExDeleteResourceLite(&Vcb
->load_lock
);
4568 ExDeleteResourceLite(&Vcb
->fcb_lock
);
4569 ExDeleteResourceLite(&Vcb
->chunk_lock
);
4570 ExDeleteResourceLite(&Vcb
->dirty_fcbs_lock
);
4571 ExDeleteResourceLite(&Vcb
->dirty_filerefs_lock
);
4572 ExDeleteResourceLite(&Vcb
->dirty_subvols_lock
);
4573 ExDeleteResourceLite(&Vcb
->scrub
.stats_lock
);
4575 if (Vcb
->devices
.Flink
) {
4576 while (!IsListEmpty(&Vcb
->devices
)) {
4577 device
* dev2
= CONTAINING_RECORD(RemoveHeadList(&Vcb
->devices
), device
, list_entry
);
4584 if (NewDeviceObject
)
4585 IoDeleteDevice(NewDeviceObject
);
4587 ExAcquireResourceExclusiveLite(&global_loading_lock
, TRUE
);
4588 InsertTailList(&VcbList
, &Vcb
->list_entry
);
4589 ExReleaseResourceLite(&global_loading_lock
);
4591 FsRtlNotifyVolumeEvent(Vcb
->root_file
, FSRTL_VOLUME_MOUNT
);
4594 TRACE("mount_vol done (status: %lx)\n", Status
);
4599 static NTSTATUS
verify_device(_In_ device_extension
* Vcb
, _Inout_ device
* dev
) {
4606 return STATUS_WRONG_VOLUME
;
4608 if (dev
->removable
) {
4609 IO_STATUS_BLOCK iosb
;
4611 Status
= dev_ioctl(dev
->devobj
, IOCTL_STORAGE_CHECK_VERIFY
, NULL
, 0, &cc
, sizeof(ULONG
), TRUE
, &iosb
);
4613 if (IoIsErrorUserInduced(Status
)) {
4614 ERR("IOCTL_STORAGE_CHECK_VERIFY returned %08x (user-induced)\n", Status
);
4617 pdo_device_extension
* pdode
= Vcb
->vde
->pdode
;
4619 BOOL changed
= FALSE
;
4621 ExAcquireResourceExclusiveLite(&pdode
->child_lock
, TRUE
);
4623 le2
= pdode
->children
.Flink
;
4624 while (le2
!= &pdode
->children
) {
4625 volume_child
* vc
= CONTAINING_RECORD(le2
, volume_child
, list_entry
);
4627 if (vc
->devobj
== dev
->devobj
) {
4628 TRACE("removing device\n");
4630 remove_volume_child(Vcb
->vde
, vc
, TRUE
);
4640 ExReleaseResourceLite(&pdode
->child_lock
);
4642 } else if (!NT_SUCCESS(Status
)) {
4643 ERR("IOCTL_STORAGE_CHECK_VERIFY returned %08x\n", Status
);
4645 } else if (iosb
.Information
< sizeof(ULONG
)) {
4646 ERR("iosb.Information was too short\n");
4647 return STATUS_INTERNAL_ERROR
;
4650 dev
->change_count
= cc
;
4653 to_read
= dev
->devobj
->SectorSize
== 0 ? sizeof(superblock
) : (ULONG
)sector_align(sizeof(superblock
), dev
->devobj
->SectorSize
);
4655 sb
= ExAllocatePoolWithTag(NonPagedPool
, to_read
, ALLOC_TAG
);
4657 ERR("out of memory\n");
4658 return STATUS_INSUFFICIENT_RESOURCES
;
4661 Status
= sync_read_phys(dev
->devobj
, superblock_addrs
[0], to_read
, (PUCHAR
)sb
, TRUE
);
4662 if (!NT_SUCCESS(Status
)) {
4663 ERR("Failed to read superblock: %08x\n", Status
);
4668 if (sb
->magic
!= BTRFS_MAGIC
) {
4669 ERR("not a BTRFS volume\n");
4671 return STATUS_WRONG_VOLUME
;
4674 crc32
= ~calc_crc32c(0xffffffff, (UINT8
*)&sb
->uuid
, (ULONG
)sizeof(superblock
) - sizeof(sb
->checksum
));
4675 TRACE("crc32 was %08x, expected %08x\n", crc32
, *((UINT32
*)sb
->checksum
));
4677 if (crc32
!= *((UINT32
*)sb
->checksum
)) {
4678 ERR("checksum error\n");
4680 return STATUS_WRONG_VOLUME
;
4683 if (RtlCompareMemory(&sb
->uuid
, &Vcb
->superblock
.uuid
, sizeof(BTRFS_UUID
)) != sizeof(BTRFS_UUID
)) {
4684 ERR("different UUIDs\n");
4686 return STATUS_WRONG_VOLUME
;
4691 dev
->devobj
->Flags
&= ~DO_VERIFY_VOLUME
;
4693 return STATUS_SUCCESS
;
4696 static NTSTATUS
verify_volume(_In_ PDEVICE_OBJECT devobj
) {
4697 device_extension
* Vcb
= devobj
->DeviceExtension
;
4700 UINT64 failed_devices
= 0;
4701 BOOL locked
= FALSE
, remove
= FALSE
;
4703 if (!(Vcb
->Vpb
->Flags
& VPB_MOUNTED
))
4704 return STATUS_WRONG_VOLUME
;
4706 if (!ExIsResourceAcquiredExclusive(&Vcb
->tree_lock
)) {
4707 ExAcquireResourceExclusiveLite(&Vcb
->tree_lock
, TRUE
);
4711 if (Vcb
->removing
) {
4712 if (locked
) ExReleaseResourceLite(&Vcb
->tree_lock
);
4713 return STATUS_WRONG_VOLUME
;
4716 InterlockedIncrement(&Vcb
->open_files
); // so pnp_surprise_removal doesn't uninit the device while we're still using it
4718 le
= Vcb
->devices
.Flink
;
4719 while (le
!= &Vcb
->devices
) {
4720 device
* dev
= CONTAINING_RECORD(le
, device
, list_entry
);
4722 Status
= verify_device(Vcb
, dev
);
4723 if (!NT_SUCCESS(Status
)) {
4726 if (dev
->devobj
&& Vcb
->options
.allow_degraded
)
4733 InterlockedDecrement(&Vcb
->open_files
);
4735 if (Vcb
->removing
&& Vcb
->open_files
== 0)
4739 ExReleaseResourceLite(&Vcb
->tree_lock
);
4746 if (failed_devices
== 0 || (Vcb
->options
.allow_degraded
&& failed_devices
< Vcb
->superblock
.num_devices
)) {
4747 Vcb
->Vpb
->RealDevice
->Flags
&= ~DO_VERIFY_VOLUME
;
4749 return STATUS_SUCCESS
;
4755 _Dispatch_type_(IRP_MJ_FILE_SYSTEM_CONTROL
)
4756 _Function_class_(DRIVER_DISPATCH
)
4757 static NTSTATUS
drv_file_system_control(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
4758 PIO_STACK_LOCATION IrpSp
;
4760 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
4763 FsRtlEnterFileSystem();
4765 TRACE("file system control\n");
4767 top_level
= is_top_level(Irp
);
4769 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
4770 Status
= vol_file_system_control(DeviceObject
, Irp
);
4772 } else if (!Vcb
|| (Vcb
->type
!= VCB_TYPE_FS
&& Vcb
->type
!= VCB_TYPE_CONTROL
)) {
4773 Status
= STATUS_INVALID_PARAMETER
;
4777 Status
= STATUS_NOT_IMPLEMENTED
;
4779 IrpSp
= IoGetCurrentIrpStackLocation( Irp
);
4781 Irp
->IoStatus
.Information
= 0;
4783 switch (IrpSp
->MinorFunction
) {
4784 case IRP_MN_MOUNT_VOLUME
:
4785 TRACE("IRP_MN_MOUNT_VOLUME\n");
4787 Status
= mount_vol(DeviceObject
, Irp
);
4790 case IRP_MN_KERNEL_CALL
:
4791 TRACE("IRP_MN_KERNEL_CALL\n");
4793 Status
= fsctl_request(DeviceObject
, &Irp
, IrpSp
->Parameters
.FileSystemControl
.FsControlCode
);
4796 case IRP_MN_USER_FS_REQUEST
:
4797 TRACE("IRP_MN_USER_FS_REQUEST\n");
4799 Status
= fsctl_request(DeviceObject
, &Irp
, IrpSp
->Parameters
.FileSystemControl
.FsControlCode
);
4802 case IRP_MN_VERIFY_VOLUME
:
4803 TRACE("IRP_MN_VERIFY_VOLUME\n");
4805 Status
= verify_volume(DeviceObject
);
4807 if (!NT_SUCCESS(Status
) && Vcb
->Vpb
->Flags
& VPB_MOUNTED
) {
4808 ExAcquireResourceExclusiveLite(&Vcb
->tree_lock
, TRUE
);
4809 Vcb
->removing
= TRUE
;
4810 ExReleaseResourceLite(&Vcb
->tree_lock
);
4820 TRACE("returning %08x\n", Status
);
4823 Irp
->IoStatus
.Status
= Status
;
4825 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
4829 IoSetTopLevelIrp(NULL
);
4831 FsRtlExitFileSystem();
4836 _Dispatch_type_(IRP_MJ_LOCK_CONTROL
)
4837 _Function_class_(DRIVER_DISPATCH
)
4838 static NTSTATUS
drv_lock_control(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
4840 PIO_STACK_LOCATION IrpSp
= IoGetCurrentIrpStackLocation(Irp
);
4841 fcb
* fcb
= IrpSp
->FileObject
->FsContext
;
4842 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
4845 FsRtlEnterFileSystem();
4847 top_level
= is_top_level(Irp
);
4849 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
4850 Status
= vol_lock_control(DeviceObject
, Irp
);
4852 Irp
->IoStatus
.Status
= Status
;
4853 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
4858 TRACE("lock control\n");
4860 Status
= FsRtlProcessFileLock(&fcb
->lock
, Irp
, NULL
);
4862 fcb
->Header
.IsFastIoPossible
= fast_io_possible(fcb
);
4865 TRACE("returning %08x\n", Status
);
4868 IoSetTopLevelIrp(NULL
);
4870 FsRtlExitFileSystem();
4875 _Dispatch_type_(IRP_MJ_SHUTDOWN
)
4876 _Function_class_(DRIVER_DISPATCH
)
4877 static NTSTATUS
drv_shutdown(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
4880 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
4882 FsRtlEnterFileSystem();
4884 TRACE("shutdown\n");
4886 top_level
= is_top_level(Irp
);
4888 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
4889 Status
= vol_shutdown(DeviceObject
, Irp
);
4893 Status
= STATUS_SUCCESS
;
4895 shutting_down
= TRUE
;
4896 KeSetEvent(&mountmgr_thread_event
, 0, FALSE
);
4898 while (!IsListEmpty(&VcbList
)) {
4899 Vcb
= CONTAINING_RECORD(VcbList
.Flink
, device_extension
, list_entry
);
4901 TRACE("shutting down Vcb %p\n", Vcb
);
4908 ObDereferenceObject(comfo
);
4915 Irp
->IoStatus
.Status
= Status
;
4916 Irp
->IoStatus
.Information
= 0;
4918 IoCompleteRequest( Irp
, IO_NO_INCREMENT
);
4921 IoSetTopLevelIrp(NULL
);
4923 FsRtlExitFileSystem();
4928 _Dispatch_type_(IRP_MJ_POWER
)
4929 _Function_class_(DRIVER_DISPATCH
)
4930 static NTSTATUS
drv_power(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
4932 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
4935 FsRtlEnterFileSystem();
4937 top_level
= is_top_level(Irp
);
4939 Irp
->IoStatus
.Information
= 0;
4941 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
4942 Status
= vol_power(DeviceObject
, Irp
);
4944 Irp
->IoStatus
.Status
= Status
;
4945 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
4948 } else if (Vcb
&& Vcb
->type
== VCB_TYPE_FS
) {
4949 IoSkipCurrentIrpStackLocation(Irp
);
4951 Status
= IoCallDriver(Vcb
->Vpb
->RealDevice
, Irp
);
4956 Status
= STATUS_INVALID_DEVICE_REQUEST
;
4957 Irp
->IoStatus
.Status
= Status
;
4958 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
4962 IoSetTopLevelIrp(NULL
);
4964 FsRtlExitFileSystem();
4969 _Dispatch_type_(IRP_MJ_SYSTEM_CONTROL
)
4970 _Function_class_(DRIVER_DISPATCH
)
4971 static NTSTATUS
drv_system_control(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
4973 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
4976 FsRtlEnterFileSystem();
4978 top_level
= is_top_level(Irp
);
4980 Irp
->IoStatus
.Information
= 0;
4982 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
4983 volume_device_extension
* vde
= DeviceObject
->DeviceExtension
;
4985 IoSkipCurrentIrpStackLocation(Irp
);
4987 Status
= IoCallDriver(vde
->pdo
, Irp
);
4990 } else if (Vcb
&& Vcb
->type
== VCB_TYPE_FS
) {
4991 IoSkipCurrentIrpStackLocation(Irp
);
4993 Status
= IoCallDriver(Vcb
->Vpb
->RealDevice
, Irp
);
4998 Status
= Irp
->IoStatus
.Status
;
4999 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
5003 IoSetTopLevelIrp(NULL
);
5005 FsRtlExitFileSystem();
5010 BOOL
is_file_name_valid(_In_ PUNICODE_STRING us
, _In_ BOOL posix
) {
5013 if (us
->Length
< sizeof(WCHAR
))
5016 if (us
->Length
> 255 * sizeof(WCHAR
))
5019 for (i
= 0; i
< us
->Length
/ sizeof(WCHAR
); i
++) {
5020 if (us
->Buffer
[i
] == '/' || us
->Buffer
[i
] == 0 ||
5021 (!posix
&& (us
->Buffer
[i
] == '<' || us
->Buffer
[i
] == '>' || us
->Buffer
[i
] == ':' || us
->Buffer
[i
] == '"' ||
5022 us
->Buffer
[i
] == '|' || us
->Buffer
[i
] == '?' || us
->Buffer
[i
] == '*' || (us
->Buffer
[i
] >= 1 && us
->Buffer
[i
] <= 31))))
5026 if (us
->Buffer
[0] == '.' && (us
->Length
== sizeof(WCHAR
) || (us
->Length
== 2 * sizeof(WCHAR
) && us
->Buffer
[1] == '.')))
5032 void chunk_lock_range(_In_ device_extension
* Vcb
, _In_ chunk
* c
, _In_ UINT64 start
, _In_ UINT64 length
) {
5037 rl
= ExAllocateFromNPagedLookasideList(&Vcb
->range_lock_lookaside
);
5039 ERR("out of memory\n");
5044 rl
->length
= length
;
5045 rl
->thread
= PsGetCurrentThread();
5050 ExAcquireResourceExclusiveLite(&c
->range_locks_lock
, TRUE
);
5052 le
= c
->range_locks
.Flink
;
5053 while (le
!= &c
->range_locks
) {
5054 range_lock
* rl2
= CONTAINING_RECORD(le
, range_lock
, list_entry
);
5056 if (rl2
->start
< start
+ length
&& rl2
->start
+ rl2
->length
> start
&& rl2
->thread
!= PsGetCurrentThread()) {
5065 InsertTailList(&c
->range_locks
, &rl
->list_entry
);
5067 ExReleaseResourceLite(&c
->range_locks_lock
);
5071 KeClearEvent(&c
->range_locks_event
);
5073 ExReleaseResourceLite(&c
->range_locks_lock
);
5075 KeWaitForSingleObject(&c
->range_locks_event
, UserRequest
, KernelMode
, FALSE
, NULL
);
5079 void chunk_unlock_range(_In_ device_extension
* Vcb
, _In_ chunk
* c
, _In_ UINT64 start
, _In_ UINT64 length
) {
5082 ExAcquireResourceExclusiveLite(&c
->range_locks_lock
, TRUE
);
5084 le
= c
->range_locks
.Flink
;
5085 while (le
!= &c
->range_locks
) {
5086 range_lock
* rl
= CONTAINING_RECORD(le
, range_lock
, list_entry
);
5088 if (rl
->start
== start
&& rl
->length
== length
) {
5089 RemoveEntryList(&rl
->list_entry
);
5090 ExFreeToNPagedLookasideList(&Vcb
->range_lock_lookaside
, rl
);
5097 KeSetEvent(&c
->range_locks_event
, 0, FALSE
);
5099 ExReleaseResourceLite(&c
->range_locks_lock
);
5102 void log_device_error(_In_ device_extension
* Vcb
, _Inout_ device
* dev
, _In_
int error
) {
5103 dev
->stats
[error
]++;
5104 dev
->stats_changed
= TRUE
;
5105 Vcb
->stats_changed
= TRUE
;
5109 _Function_class_(KSTART_ROUTINE
)
5110 static void serial_thread(void* context
) {
5111 LARGE_INTEGER due_time
;
5116 KeInitializeTimer(&timer
);
5118 due_time
.QuadPart
= (UINT64
)-10000000;
5120 KeSetTimer(&timer
, due_time
, NULL
);
5123 KeWaitForSingleObject(&timer
, Executive
, KernelMode
, FALSE
, NULL
);
5130 KeSetTimer(&timer
, due_time
, NULL
);
5133 KeCancelTimer(&timer
);
5135 PsTerminateSystemThread(STATUS_SUCCESS
);
5137 serial_thread_handle
= NULL
;
5140 static void init_serial(BOOL first_time
) {
5143 Status
= IoGetDeviceObjectPointer(&log_device
, FILE_WRITE_DATA
, &comfo
, &comdo
);
5144 if (!NT_SUCCESS(Status
)) {
5145 ERR("IoGetDeviceObjectPointer returned %08x\n", Status
);
5150 Status
= PsCreateSystemThread(&serial_thread_handle
, 0, NULL
, NULL
, NULL
, serial_thread
, NULL
);
5151 if (!NT_SUCCESS(Status
)) {
5152 ERR("PsCreateSystemThread returned %08x\n", Status
);
5161 static void check_cpu() {
5162 unsigned int cpuInfo
[4];
5164 __get_cpuid(1, &cpuInfo
[0], &cpuInfo
[1], &cpuInfo
[2], &cpuInfo
[3]);
5165 have_sse42
= cpuInfo
[2] & bit_SSE4_2
;
5166 have_sse2
= cpuInfo
[3] & bit_SSE2
;
5168 __cpuid(cpuInfo
, 1);
5169 have_sse42
= cpuInfo
[2] & (1 << 20);
5170 have_sse2
= cpuInfo
[3] & (1 << 26);
5174 TRACE("SSE4.2 is supported\n");
5176 TRACE("SSE4.2 not supported\n");
5179 TRACE("SSE2 is supported\n");
5181 TRACE("SSE2 is not supported\n");
5186 static void init_logging() {
5187 ExAcquireResourceExclusiveLite(&log_lock
, TRUE
);
5189 if (log_device
.Length
> 0)
5191 else if (log_file
.Length
> 0) {
5193 OBJECT_ATTRIBUTES oa
;
5194 IO_STATUS_BLOCK iosb
;
5199 InitializeObjectAttributes(&oa
, &log_file
, OBJ_CASE_INSENSITIVE
| OBJ_KERNEL_HANDLE
, NULL
, NULL
);
5201 Status
= ZwCreateFile(&log_handle
, FILE_WRITE_DATA
, &oa
, &iosb
, NULL
, FILE_ATTRIBUTE_NORMAL
, FILE_SHARE_READ
,
5202 FILE_OPEN_IF
, FILE_NON_DIRECTORY_FILE
| FILE_WRITE_THROUGH
| FILE_SYNCHRONOUS_IO_ALERT
, NULL
, 0);
5204 if (!NT_SUCCESS(Status
)) {
5205 ERR("ZwCreateFile returned %08x\n", Status
);
5209 if (iosb
.Information
== FILE_OPENED
) { // already exists
5210 FILE_STANDARD_INFORMATION fsi
;
5211 FILE_POSITION_INFORMATION fpi
;
5213 static char delim
[] = "\n---\n";
5215 // move to end of file
5217 Status
= ZwQueryInformationFile(log_handle
, &iosb
, &fsi
, sizeof(FILE_STANDARD_INFORMATION
), FileStandardInformation
);
5219 if (!NT_SUCCESS(Status
)) {
5220 ERR("ZwQueryInformationFile returned %08x\n", Status
);
5224 fpi
.CurrentByteOffset
= fsi
.EndOfFile
;
5226 Status
= ZwSetInformationFile(log_handle
, &iosb
, &fpi
, sizeof(FILE_POSITION_INFORMATION
), FilePositionInformation
);
5228 if (!NT_SUCCESS(Status
)) {
5229 ERR("ZwSetInformationFile returned %08x\n", Status
);
5233 Status
= ZwWriteFile(log_handle
, NULL
, NULL
, NULL
, &iosb
, delim
, (ULONG
)strlen(delim
), NULL
, NULL
);
5235 if (!NT_SUCCESS(Status
)) {
5236 ERR("ZwWriteFile returned %08x\n", Status
);
5241 dateline
= ExAllocatePoolWithTag(PagedPool
, 256, ALLOC_TAG
);
5244 ERR("out of memory\n");
5248 KeQuerySystemTime(&time
);
5250 RtlTimeToTimeFields(&time
, &tf
);
5252 sprintf(dateline
, "Starting logging at %04i-%02i-%02i %02i:%02i:%02i\n", tf
.Year
, tf
.Month
, tf
.Day
, tf
.Hour
, tf
.Minute
, tf
.Second
);
5254 Status
= ZwWriteFile(log_handle
, NULL
, NULL
, NULL
, &iosb
, dateline
, (ULONG
)strlen(dateline
), NULL
, NULL
);
5256 ExFreePool(dateline
);
5258 if (!NT_SUCCESS(Status
)) {
5259 ERR("ZwWriteFile returned %08x\n", Status
);
5265 ExReleaseResourceLite(&log_lock
);
5269 _Function_class_(KSTART_ROUTINE
)
5271 static void NTAPI
degraded_wait_thread(_In_
void* context
) {
5273 static void degraded_wait_thread(_In_
void* context
) {
5276 LARGE_INTEGER delay
;
5280 KeInitializeTimer(&timer
);
5282 delay
.QuadPart
= -30000000; // wait three seconds
5283 KeSetTimer(&timer
, delay
, NULL
);
5284 KeWaitForSingleObject(&timer
, Executive
, KernelMode
, FALSE
, NULL
);
5286 TRACE("timer expired\n");
5288 degraded_wait
= FALSE
;
5290 ZwClose(degraded_wait_handle
);
5291 degraded_wait_handle
= NULL
;
5293 PsTerminateSystemThread(STATUS_SUCCESS
);
5297 NTSTATUS NTAPI
AddDevice(PDRIVER_OBJECT DriverObject
, PDEVICE_OBJECT PhysicalDeviceObject
) {
5299 NTSTATUS
AddDevice(PDRIVER_OBJECT DriverObject
, PDEVICE_OBJECT PhysicalDeviceObject
) {
5303 UNICODE_STRING volname
;
5305 pdo_device_extension
* pdode
= NULL
;
5306 PDEVICE_OBJECT voldev
;
5307 volume_device_extension
* vde
;
5309 TRACE("(%p, %p)\n", DriverObject
, PhysicalDeviceObject
);
5311 ExAcquireResourceSharedLite(&pdo_list_lock
, TRUE
);
5313 le
= pdo_list
.Flink
;
5314 while (le
!= &pdo_list
) {
5315 pdo_device_extension
* pdode2
= CONTAINING_RECORD(le
, pdo_device_extension
, list_entry
);
5317 if (pdode2
->pdo
== PhysicalDeviceObject
) {
5326 WARN("unrecognized PDO %p\n", PhysicalDeviceObject
);
5327 Status
= STATUS_NOT_SUPPORTED
;
5331 ExAcquireResourceSharedLite(&pdode
->child_lock
, TRUE
);
5333 volname
.Length
= volname
.MaximumLength
= (USHORT
)((wcslen(BTRFS_VOLUME_PREFIX
) + 36 + 1) * sizeof(WCHAR
));
5334 volname
.Buffer
= ExAllocatePoolWithTag(PagedPool
, volname
.MaximumLength
, ALLOC_TAG
); // FIXME - when do we free this?
5336 if (!volname
.Buffer
) {
5337 ERR("out of memory\n");
5338 Status
= STATUS_INSUFFICIENT_RESOURCES
;
5342 RtlCopyMemory(volname
.Buffer
, BTRFS_VOLUME_PREFIX
, wcslen(BTRFS_VOLUME_PREFIX
) * sizeof(WCHAR
));
5344 j
= (ULONG
)wcslen(BTRFS_VOLUME_PREFIX
);
5345 for (i
= 0; i
< 16; i
++) {
5346 volname
.Buffer
[j
] = hex_digit(pdode
->uuid
.uuid
[i
] >> 4); j
++;
5347 volname
.Buffer
[j
] = hex_digit(pdode
->uuid
.uuid
[i
] & 0xf); j
++;
5349 if (i
== 3 || i
== 5 || i
== 7 || i
== 9) {
5350 volname
.Buffer
[j
] = '-';
5355 volname
.Buffer
[j
] = '}';
5357 Status
= IoCreateDevice(drvobj
, sizeof(volume_device_extension
), &volname
, FILE_DEVICE_DISK
,
5358 RtlIsNtDdiVersionAvailable(NTDDI_WIN8
) ? FILE_DEVICE_ALLOW_APPCONTAINER_TRAVERSAL
: 0, FALSE
, &voldev
);
5359 if (!NT_SUCCESS(Status
)) {
5360 ERR("IoCreateDevice returned %08x\n", Status
);
5364 voldev
->SectorSize
= PhysicalDeviceObject
->SectorSize
;
5365 voldev
->Flags
|= DO_DIRECT_IO
;
5367 vde
= voldev
->DeviceExtension
;
5368 vde
->type
= VCB_TYPE_VOLUME
;
5369 vde
->name
= volname
;
5370 vde
->device
= voldev
;
5371 vde
->mounted_device
= NULL
;
5372 vde
->pdo
= PhysicalDeviceObject
;
5374 vde
->removing
= FALSE
;
5375 vde
->open_count
= 0;
5377 Status
= IoRegisterDeviceInterface(PhysicalDeviceObject
, &GUID_DEVINTERFACE_VOLUME
, NULL
, &vde
->bus_name
);
5378 if (!NT_SUCCESS(Status
))
5379 WARN("IoRegisterDeviceInterface returned %08x\n", Status
);
5381 vde
->attached_device
= IoAttachDeviceToDeviceStack(voldev
, PhysicalDeviceObject
);
5385 if (pdode
->removable
)
5386 voldev
->Characteristics
|= FILE_REMOVABLE_MEDIA
;
5388 voldev
->Flags
&= ~DO_DEVICE_INITIALIZING
;
5390 Status
= IoSetDeviceInterfaceState(&vde
->bus_name
, TRUE
);
5391 if (!NT_SUCCESS(Status
))
5392 WARN("IoSetDeviceInterfaceState returned %08x\n", Status
);
5394 Status
= STATUS_SUCCESS
;
5397 ExReleaseResourceLite(&pdode
->child_lock
);
5400 ExReleaseResourceLite(&pdo_list_lock
);
5405 _Function_class_(DRIVER_INITIALIZE
)
5407 NTSTATUS NTAPI
DriverEntry(_In_ PDRIVER_OBJECT DriverObject
, _In_ PUNICODE_STRING RegistryPath
) {
5409 NTSTATUS
DriverEntry(_In_ PDRIVER_OBJECT DriverObject
, _In_ PUNICODE_STRING RegistryPath
) {
5412 PDEVICE_OBJECT DeviceObject
;
5413 UNICODE_STRING device_nameW
;
5414 UNICODE_STRING dosdevice_nameW
;
5415 control_device_extension
* cde
;
5417 OBJECT_ATTRIBUTES oa
;
5420 InitializeListHead(&uid_map_list
);
5421 InitializeListHead(&gid_map_list
);
5424 ExInitializeResourceLite(&log_lock
);
5426 ExInitializeResourceLite(&mapping_lock
);
5428 log_device
.Buffer
= NULL
;
5429 log_device
.Length
= log_device
.MaximumLength
= 0;
5430 log_file
.Buffer
= NULL
;
5431 log_file
.Length
= log_file
.MaximumLength
= 0;
5433 registry_path
.Length
= registry_path
.MaximumLength
= RegistryPath
->Length
;
5434 registry_path
.Buffer
= ExAllocatePoolWithTag(PagedPool
, registry_path
.Length
, ALLOC_TAG
);
5436 if (!registry_path
.Buffer
) {
5437 ERR("out of memory\n");
5438 return STATUS_INSUFFICIENT_RESOURCES
;
5441 RtlCopyMemory(registry_path
.Buffer
, RegistryPath
->Buffer
, registry_path
.Length
);
5443 read_registry(®istry_path
, FALSE
);
5446 if (debug_log_level
> 0)
5452 TRACE("DriverEntry\n");
5458 if (RtlIsNtDdiVersionAvailable(NTDDI_WIN8
)) {
5459 UNICODE_STRING name
;
5460 tPsIsDiskCountersEnabled fPsIsDiskCountersEnabled
;
5462 RtlInitUnicodeString(&name
, L
"PsIsDiskCountersEnabled");
5463 fPsIsDiskCountersEnabled
= (tPsIsDiskCountersEnabled
)MmGetSystemRoutineAddress(&name
);
5465 if (fPsIsDiskCountersEnabled
) {
5466 diskacc
= fPsIsDiskCountersEnabled();
5468 RtlInitUnicodeString(&name
, L
"PsUpdateDiskCounters");
5469 fPsUpdateDiskCounters
= (tPsUpdateDiskCounters
)MmGetSystemRoutineAddress(&name
);
5471 if (!fPsUpdateDiskCounters
)
5474 RtlInitUnicodeString(&name
, L
"FsRtlUpdateDiskCounters");
5475 fFsRtlUpdateDiskCounters
= (tFsRtlUpdateDiskCounters
)MmGetSystemRoutineAddress(&name
);
5478 RtlInitUnicodeString(&name
, L
"CcCopyReadEx");
5479 fCcCopyReadEx
= (tCcCopyReadEx
)MmGetSystemRoutineAddress(&name
);
5481 RtlInitUnicodeString(&name
, L
"CcCopyWriteEx");
5482 fCcCopyWriteEx
= (tCcCopyWriteEx
)MmGetSystemRoutineAddress(&name
);
5484 RtlInitUnicodeString(&name
, L
"CcSetAdditionalCacheAttributesEx");
5485 fCcSetAdditionalCacheAttributesEx
= (tCcSetAdditionalCacheAttributesEx
)MmGetSystemRoutineAddress(&name
);
5487 fPsUpdateDiskCounters
= NULL
;
5488 fCcCopyReadEx
= NULL
;
5489 fCcCopyWriteEx
= NULL
;
5490 fCcSetAdditionalCacheAttributesEx
= NULL
;
5491 fFsRtlUpdateDiskCounters
= NULL
;
5494 drvobj
= DriverObject
;
5496 DriverObject
->DriverUnload
= DriverUnload
;
5498 DriverObject
->DriverExtension
->AddDevice
= AddDevice
;
5500 DriverObject
->MajorFunction
[IRP_MJ_CREATE
] = (PDRIVER_DISPATCH
)drv_create
;
5501 DriverObject
->MajorFunction
[IRP_MJ_CLOSE
] = (PDRIVER_DISPATCH
)drv_close
;
5502 DriverObject
->MajorFunction
[IRP_MJ_READ
] = (PDRIVER_DISPATCH
)drv_read
;
5503 DriverObject
->MajorFunction
[IRP_MJ_WRITE
] = (PDRIVER_DISPATCH
)drv_write
;
5504 DriverObject
->MajorFunction
[IRP_MJ_QUERY_INFORMATION
] = (PDRIVER_DISPATCH
)drv_query_information
;
5505 DriverObject
->MajorFunction
[IRP_MJ_SET_INFORMATION
] = (PDRIVER_DISPATCH
)drv_set_information
;
5506 DriverObject
->MajorFunction
[IRP_MJ_QUERY_EA
] = (PDRIVER_DISPATCH
)drv_query_ea
;
5507 DriverObject
->MajorFunction
[IRP_MJ_SET_EA
] = (PDRIVER_DISPATCH
)drv_set_ea
;
5508 DriverObject
->MajorFunction
[IRP_MJ_FLUSH_BUFFERS
] = (PDRIVER_DISPATCH
)drv_flush_buffers
;
5509 DriverObject
->MajorFunction
[IRP_MJ_QUERY_VOLUME_INFORMATION
] = (PDRIVER_DISPATCH
)drv_query_volume_information
;
5510 DriverObject
->MajorFunction
[IRP_MJ_SET_VOLUME_INFORMATION
] = (PDRIVER_DISPATCH
)drv_set_volume_information
;
5511 DriverObject
->MajorFunction
[IRP_MJ_DIRECTORY_CONTROL
] = (PDRIVER_DISPATCH
)drv_directory_control
;
5512 DriverObject
->MajorFunction
[IRP_MJ_FILE_SYSTEM_CONTROL
] = (PDRIVER_DISPATCH
)drv_file_system_control
;
5513 DriverObject
->MajorFunction
[IRP_MJ_DEVICE_CONTROL
] = (PDRIVER_DISPATCH
)drv_device_control
;
5514 DriverObject
->MajorFunction
[IRP_MJ_SHUTDOWN
] = (PDRIVER_DISPATCH
)drv_shutdown
;
5515 DriverObject
->MajorFunction
[IRP_MJ_LOCK_CONTROL
] = (PDRIVER_DISPATCH
)drv_lock_control
;
5516 DriverObject
->MajorFunction
[IRP_MJ_CLEANUP
] = (PDRIVER_DISPATCH
)drv_cleanup
;
5517 DriverObject
->MajorFunction
[IRP_MJ_QUERY_SECURITY
] = (PDRIVER_DISPATCH
)drv_query_security
;
5518 DriverObject
->MajorFunction
[IRP_MJ_SET_SECURITY
] = (PDRIVER_DISPATCH
)drv_set_security
;
5519 DriverObject
->MajorFunction
[IRP_MJ_POWER
] = (PDRIVER_DISPATCH
)drv_power
;
5520 DriverObject
->MajorFunction
[IRP_MJ_SYSTEM_CONTROL
] = (PDRIVER_DISPATCH
)drv_system_control
;
5521 DriverObject
->MajorFunction
[IRP_MJ_PNP
] = (PDRIVER_DISPATCH
)drv_pnp
;
5523 init_fast_io_dispatch(&DriverObject
->FastIoDispatch
);
5525 device_nameW
.Buffer
= device_name
;
5526 device_nameW
.Length
= device_nameW
.MaximumLength
= (USHORT
)wcslen(device_name
) * sizeof(WCHAR
);
5527 dosdevice_nameW
.Buffer
= dosdevice_name
;
5528 dosdevice_nameW
.Length
= dosdevice_nameW
.MaximumLength
= (USHORT
)wcslen(dosdevice_name
) * sizeof(WCHAR
);
5530 Status
= IoCreateDevice(DriverObject
, sizeof(control_device_extension
), &device_nameW
, FILE_DEVICE_DISK_FILE_SYSTEM
,
5531 FILE_DEVICE_SECURE_OPEN
, FALSE
, &DeviceObject
);
5532 if (!NT_SUCCESS(Status
)) {
5533 ERR("IoCreateDevice returned %08x\n", Status
);
5537 master_devobj
= DeviceObject
;
5538 cde
= (control_device_extension
*)master_devobj
->DeviceExtension
;
5540 RtlZeroMemory(cde
, sizeof(control_device_extension
));
5542 cde
->type
= VCB_TYPE_CONTROL
;
5544 DeviceObject
->Flags
&= ~DO_DEVICE_INITIALIZING
;
5546 Status
= IoCreateSymbolicLink(&dosdevice_nameW
, &device_nameW
);
5547 if (!NT_SUCCESS(Status
)) {
5548 ERR("IoCreateSymbolicLink returned %08x\n", Status
);
5552 Status
= init_cache();
5553 if (!NT_SUCCESS(Status
)) {
5554 ERR("init_cache returned %08x\n", Status
);
5558 InitializeListHead(&VcbList
);
5559 ExInitializeResourceLite(&global_loading_lock
);
5560 ExInitializeResourceLite(&pdo_list_lock
);
5562 InitializeListHead(&pdo_list
);
5564 InitializeObjectAttributes(&oa
, RegistryPath
, OBJ_CASE_INSENSITIVE
| OBJ_KERNEL_HANDLE
, NULL
, NULL
);
5565 Status
= ZwCreateKey(®h
, KEY_QUERY_VALUE
| KEY_ENUMERATE_SUB_KEYS
| KEY_NOTIFY
, &oa
, 0, NULL
, REG_OPTION_NON_VOLATILE
, &dispos
);
5566 if (!NT_SUCCESS(Status
)) {
5567 ERR("ZwCreateKey returned %08x\n", Status
);
5571 watch_registry(regh
);
5573 Status
= IoReportDetectedDevice(drvobj
, InterfaceTypeUndefined
, 0xFFFFFFFF, 0xFFFFFFFF,
5574 NULL
, NULL
, 0, &cde
->buspdo
);
5575 if (!NT_SUCCESS(Status
)) {
5576 ERR("IoReportDetectedDevice returned %08x\n", Status
);
5580 Status
= IoRegisterDeviceInterface(cde
->buspdo
, &BtrfsBusInterface
, NULL
, &cde
->bus_name
);
5581 if (!NT_SUCCESS(Status
))
5582 WARN("IoRegisterDeviceInterface returned %08x\n", Status
);
5584 cde
->attached_device
= IoAttachDeviceToDeviceStack(DeviceObject
, cde
->buspdo
);
5586 Status
= IoSetDeviceInterfaceState(&cde
->bus_name
, TRUE
);
5587 if (!NT_SUCCESS(Status
))
5588 WARN("IoSetDeviceInterfaceState returned %08x\n", Status
);
5590 DeviceObject
->Flags
&= ~DO_DEVICE_INITIALIZING
;
5592 IoInvalidateDeviceRelations(cde
->buspdo
, BusRelations
);
5594 Status
= PsCreateSystemThread(°raded_wait_handle
, 0, NULL
, NULL
, NULL
, degraded_wait_thread
, NULL
);
5595 if (!NT_SUCCESS(Status
))
5596 WARN("PsCreateSystemThread returned %08x\n", Status
);
5598 Status
= IoRegisterPlugPlayNotification(EventCategoryDeviceInterfaceChange
, PNPNOTIFY_DEVICE_INTERFACE_INCLUDE_EXISTING_INTERFACES
,
5599 (PVOID
)&GUID_DEVINTERFACE_VOLUME
, DriverObject
, volume_notification
, DriverObject
, ¬ification_entry2
);
5600 if (!NT_SUCCESS(Status
))
5601 ERR("IoRegisterPlugPlayNotification returned %08x\n", Status
);
5603 Status
= IoRegisterPlugPlayNotification(EventCategoryDeviceInterfaceChange
, PNPNOTIFY_DEVICE_INTERFACE_INCLUDE_EXISTING_INTERFACES
,
5604 (PVOID
)&GUID_DEVINTERFACE_HIDDEN_VOLUME
, DriverObject
, volume_notification
, DriverObject
, ¬ification_entry3
);
5605 if (!NT_SUCCESS(Status
))
5606 ERR("IoRegisterPlugPlayNotification returned %08x\n", Status
);
5608 Status
= IoRegisterPlugPlayNotification(EventCategoryDeviceInterfaceChange
, PNPNOTIFY_DEVICE_INTERFACE_INCLUDE_EXISTING_INTERFACES
,
5609 (PVOID
)&GUID_DEVINTERFACE_DISK
, DriverObject
, pnp_notification
, DriverObject
, ¬ification_entry
);
5610 if (!NT_SUCCESS(Status
))
5611 ERR("IoRegisterPlugPlayNotification returned %08x\n", Status
);
5613 finished_probing
= TRUE
;
5615 KeInitializeEvent(&mountmgr_thread_event
, NotificationEvent
, FALSE
);
5618 Status
= PsCreateSystemThread(&mountmgr_thread_handle
, 0, NULL
, NULL
, NULL
, mountmgr_thread
, NULL
);
5619 if (!NT_SUCCESS(Status
))
5620 WARN("PsCreateSystemThread returned %08x\n", Status
);
5623 IoRegisterFileSystem(DeviceObject
);
5625 return STATUS_SUCCESS
;