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
)
468 static NTSTATUS NTAPI
drv_close(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
470 static NTSTATUS
drv_close(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
473 PIO_STACK_LOCATION IrpSp
;
474 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
477 FsRtlEnterFileSystem();
481 top_level
= is_top_level(Irp
);
483 if (DeviceObject
== master_devobj
) {
484 TRACE("Closing file system\n");
485 Status
= STATUS_SUCCESS
;
487 } else if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
488 Status
= vol_close(DeviceObject
, Irp
);
490 } else if (!Vcb
|| Vcb
->type
!= VCB_TYPE_FS
) {
491 Status
= STATUS_INVALID_PARAMETER
;
495 IrpSp
= IoGetCurrentIrpStackLocation(Irp
);
497 // FIXME - unmount if called for volume
498 // FIXME - call FsRtlNotifyUninitializeSync(&Vcb->NotifySync) if unmounting
500 Status
= close_file(IrpSp
->FileObject
, Irp
);
503 Irp
->IoStatus
.Status
= Status
;
504 Irp
->IoStatus
.Information
= 0;
506 IoCompleteRequest( Irp
, IO_DISK_INCREMENT
);
509 IoSetTopLevelIrp(NULL
);
511 TRACE("returning %08x\n", Status
);
513 FsRtlExitFileSystem();
518 _Dispatch_type_(IRP_MJ_FLUSH_BUFFERS
)
519 _Function_class_(DRIVER_DISPATCH
)
521 static NTSTATUS NTAPI
drv_flush_buffers(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
523 static NTSTATUS
drv_flush_buffers(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
526 PIO_STACK_LOCATION IrpSp
= IoGetCurrentIrpStackLocation( Irp
);
527 PFILE_OBJECT FileObject
= IrpSp
->FileObject
;
528 fcb
* fcb
= FileObject
->FsContext
;
529 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
532 FsRtlEnterFileSystem();
534 TRACE("flush buffers\n");
536 top_level
= is_top_level(Irp
);
538 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
539 Status
= vol_flush_buffers(DeviceObject
, Irp
);
541 } else if (!Vcb
|| Vcb
->type
!= VCB_TYPE_FS
) {
542 Status
= STATUS_INVALID_PARAMETER
;
547 ERR("fcb was NULL\n");
548 Status
= STATUS_INVALID_PARAMETER
;
552 if (fcb
== Vcb
->volume_fcb
) {
553 Status
= STATUS_INVALID_PARAMETER
;
557 Irp
->IoStatus
.Information
= 0;
559 fcb
->Header
.IsFastIoPossible
= fast_io_possible(fcb
);
561 Status
= STATUS_SUCCESS
;
562 Irp
->IoStatus
.Status
= Status
;
564 if (fcb
->type
!= BTRFS_TYPE_DIRECTORY
) {
565 CcFlushCache(&fcb
->nonpaged
->segment_object
, NULL
, 0, &Irp
->IoStatus
);
567 if (fcb
->Header
.PagingIoResource
) {
568 ExAcquireResourceExclusiveLite(fcb
->Header
.PagingIoResource
, TRUE
);
569 ExReleaseResourceLite(fcb
->Header
.PagingIoResource
);
572 Status
= Irp
->IoStatus
.Status
;
576 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
578 TRACE("returning %08x\n", Status
);
581 IoSetTopLevelIrp(NULL
);
583 FsRtlExitFileSystem();
588 static void calculate_total_space(_In_ device_extension
* Vcb
, _Out_ UINT64
* totalsize
, _Out_ UINT64
* freespace
) {
589 UINT64 nfactor
, dfactor
, sectors_used
;
591 if (Vcb
->data_flags
& BLOCK_FLAG_DUPLICATE
|| Vcb
->data_flags
& BLOCK_FLAG_RAID1
|| Vcb
->data_flags
& BLOCK_FLAG_RAID10
) {
594 } else if (Vcb
->data_flags
& BLOCK_FLAG_RAID5
) {
595 nfactor
= Vcb
->superblock
.num_devices
- 1;
596 dfactor
= Vcb
->superblock
.num_devices
;
597 } else if (Vcb
->data_flags
& BLOCK_FLAG_RAID6
) {
598 nfactor
= Vcb
->superblock
.num_devices
- 2;
599 dfactor
= Vcb
->superblock
.num_devices
;
605 sectors_used
= Vcb
->superblock
.bytes_used
/ Vcb
->superblock
.sector_size
;
607 *totalsize
= (Vcb
->superblock
.total_bytes
/ Vcb
->superblock
.sector_size
) * nfactor
/ dfactor
;
608 *freespace
= sectors_used
> *totalsize
? 0 : (*totalsize
- sectors_used
);
612 // This function exists because we have to lie about our FS type in certain situations.
613 // MPR!MprGetConnection queries the FS type, and compares it to a whitelist. If it doesn't match,
614 // it will return ERROR_NO_NET_OR_BAD_PATH, which prevents UAC from working.
615 // The command mklink refuses to create hard links on anything other than NTFS, so we have to
616 // blacklist cmd.exe too.
618 static BOOL
lie_about_fs_type() {
620 PROCESS_BASIC_INFORMATION pbi
;
625 static WCHAR mpr
[] = L
"MPR.DLL";
626 static WCHAR cmd
[] = L
"CMD.EXE";
627 static WCHAR fsutil
[] = L
"FSUTIL.EXE";
628 UNICODE_STRING mprus
, cmdus
, fsutilus
;
631 mprus
.Length
= mprus
.MaximumLength
= (USHORT
)(wcslen(mpr
) * sizeof(WCHAR
));
633 cmdus
.Length
= cmdus
.MaximumLength
= (USHORT
)(wcslen(cmd
) * sizeof(WCHAR
));
634 fsutilus
.Buffer
= fsutil
;
635 fsutilus
.Length
= fsutilus
.MaximumLength
= (USHORT
)(wcslen(fsutil
) * sizeof(WCHAR
));
637 if (!PsGetCurrentProcess())
640 Status
= ZwQueryInformationProcess(NtCurrentProcess(), ProcessBasicInformation
, &pbi
, sizeof(pbi
), &retlen
);
642 if (!NT_SUCCESS(Status
)) {
643 ERR("ZwQueryInformationProcess returned %08x\n", Status
);
647 if (!pbi
.PebBaseAddress
)
650 peb
= pbi
.PebBaseAddress
;
655 le
= peb
->Ldr
->InMemoryOrderModuleList
.Flink
;
656 while (le
!= &peb
->Ldr
->InMemoryOrderModuleList
) {
657 LDR_DATA_TABLE_ENTRY
* entry
= CONTAINING_RECORD(le
, LDR_DATA_TABLE_ENTRY
, InMemoryOrderLinks
);
658 BOOL blacklist
= FALSE
;
660 if (entry
->FullDllName
.Length
>= mprus
.Length
) {
663 name
.Buffer
= &entry
->FullDllName
.Buffer
[(entry
->FullDllName
.Length
- mprus
.Length
) / sizeof(WCHAR
)];
664 name
.Length
= name
.MaximumLength
= mprus
.Length
;
666 blacklist
= FsRtlAreNamesEqual(&name
, &mprus
, TRUE
, NULL
);
669 if (!blacklist
&& entry
->FullDllName
.Length
>= cmdus
.Length
) {
672 name
.Buffer
= &entry
->FullDllName
.Buffer
[(entry
->FullDllName
.Length
- cmdus
.Length
) / sizeof(WCHAR
)];
673 name
.Length
= name
.MaximumLength
= cmdus
.Length
;
675 blacklist
= FsRtlAreNamesEqual(&name
, &cmdus
, TRUE
, NULL
);
678 if (!blacklist
&& entry
->FullDllName
.Length
>= fsutilus
.Length
) {
681 name
.Buffer
= &entry
->FullDllName
.Buffer
[(entry
->FullDllName
.Length
- fsutilus
.Length
) / sizeof(WCHAR
)];
682 name
.Length
= name
.MaximumLength
= fsutilus
.Length
;
684 blacklist
= FsRtlAreNamesEqual(&name
, &fsutilus
, TRUE
, NULL
);
691 frames
= ExAllocatePoolWithTag(PagedPool
, 256 * sizeof(void*), ALLOC_TAG
);
693 ERR("out of memory\n");
697 num_frames
= RtlWalkFrameChain(frames
, 256, 1);
699 for (i
= 0; i
< num_frames
; i
++) {
700 // entry->Reserved3[1] appears to be the image size
701 if (frames
[i
] >= entry
->DllBase
&& (ULONG_PTR
)frames
[i
] <= (ULONG_PTR
)entry
->DllBase
+ (ULONG_PTR
)entry
->Reserved3
[1]) {
717 _Dispatch_type_(IRP_MJ_QUERY_VOLUME_INFORMATION
)
718 _Function_class_(DRIVER_DISPATCH
)
720 static NTSTATUS NTAPI
drv_query_volume_information(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
722 static NTSTATUS
drv_query_volume_information(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
724 PIO_STACK_LOCATION IrpSp
;
726 ULONG BytesCopied
= 0;
727 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
730 FsRtlEnterFileSystem();
732 TRACE("query volume information\n");
733 top_level
= is_top_level(Irp
);
735 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
736 Status
= vol_query_volume_information(DeviceObject
, Irp
);
738 } else if (!Vcb
|| Vcb
->type
!= VCB_TYPE_FS
) {
739 Status
= STATUS_INVALID_PARAMETER
;
743 IrpSp
= IoGetCurrentIrpStackLocation(Irp
);
745 Status
= STATUS_NOT_IMPLEMENTED
;
747 switch (IrpSp
->Parameters
.QueryVolume
.FsInformationClass
) {
748 case FileFsAttributeInformation
:
750 FILE_FS_ATTRIBUTE_INFORMATION
* data
= Irp
->AssociatedIrp
.SystemBuffer
;
751 BOOL overflow
= FALSE
;
753 WCHAR
* fs_name
= (Irp
->RequestorMode
== UserMode
&& lie_about_fs_type()) ? L
"NTFS" : L
"Btrfs";
754 ULONG fs_name_len
= (ULONG
)wcslen(fs_name
) * sizeof(WCHAR
);
756 WCHAR
* fs_name
= L
"Btrfs";
757 ULONG fs_name_len
= 5 * sizeof(WCHAR
);
759 ULONG orig_fs_name_len
= fs_name_len
;
761 TRACE("FileFsAttributeInformation\n");
763 if (IrpSp
->Parameters
.QueryVolume
.Length
< sizeof(FILE_FS_ATTRIBUTE_INFORMATION
) - sizeof(WCHAR
) + fs_name_len
) {
764 if (IrpSp
->Parameters
.QueryVolume
.Length
> sizeof(FILE_FS_ATTRIBUTE_INFORMATION
) - sizeof(WCHAR
))
765 fs_name_len
= IrpSp
->Parameters
.QueryVolume
.Length
- sizeof(FILE_FS_ATTRIBUTE_INFORMATION
) + sizeof(WCHAR
);
772 data
->FileSystemAttributes
= FILE_CASE_PRESERVED_NAMES
| FILE_CASE_SENSITIVE_SEARCH
|
773 FILE_UNICODE_ON_DISK
| FILE_NAMED_STREAMS
| FILE_SUPPORTS_HARD_LINKS
| FILE_PERSISTENT_ACLS
|
774 FILE_SUPPORTS_REPARSE_POINTS
| FILE_SUPPORTS_SPARSE_FILES
| FILE_SUPPORTS_OBJECT_IDS
|
775 FILE_SUPPORTS_OPEN_BY_FILE_ID
| FILE_SUPPORTS_EXTENDED_ATTRIBUTES
| FILE_SUPPORTS_BLOCK_REFCOUNTING
;
777 data
->FileSystemAttributes
|= FILE_READ_ONLY_VOLUME
;
779 // should also be FILE_FILE_COMPRESSION when supported
780 data
->MaximumComponentNameLength
= 255; // FIXME - check
781 data
->FileSystemNameLength
= orig_fs_name_len
;
782 RtlCopyMemory(data
->FileSystemName
, fs_name
, fs_name_len
);
784 BytesCopied
= sizeof(FILE_FS_ATTRIBUTE_INFORMATION
) - sizeof(WCHAR
) + fs_name_len
;
785 Status
= overflow
? STATUS_BUFFER_OVERFLOW
: STATUS_SUCCESS
;
789 case FileFsDeviceInformation
:
791 FILE_FS_DEVICE_INFORMATION
* ffdi
= Irp
->AssociatedIrp
.SystemBuffer
;
793 TRACE("FileFsDeviceInformation\n");
795 ffdi
->DeviceType
= FILE_DEVICE_DISK
;
797 ExAcquireResourceSharedLite(&Vcb
->tree_lock
, TRUE
);
798 ffdi
->Characteristics
= Vcb
->Vpb
->RealDevice
->Characteristics
;
799 ExReleaseResourceLite(&Vcb
->tree_lock
);
802 ffdi
->Characteristics
|= FILE_READ_ONLY_DEVICE
;
804 ffdi
->Characteristics
&= ~FILE_READ_ONLY_DEVICE
;
806 BytesCopied
= sizeof(FILE_FS_DEVICE_INFORMATION
);
807 Status
= STATUS_SUCCESS
;
812 case FileFsFullSizeInformation
:
814 FILE_FS_FULL_SIZE_INFORMATION
* ffsi
= Irp
->AssociatedIrp
.SystemBuffer
;
816 TRACE("FileFsFullSizeInformation\n");
818 calculate_total_space(Vcb
, (UINT64
*)&ffsi
->TotalAllocationUnits
.QuadPart
, (UINT64
*)&ffsi
->ActualAvailableAllocationUnits
.QuadPart
);
819 ffsi
->CallerAvailableAllocationUnits
.QuadPart
= ffsi
->ActualAvailableAllocationUnits
.QuadPart
;
820 ffsi
->SectorsPerAllocationUnit
= 1;
821 ffsi
->BytesPerSector
= Vcb
->superblock
.sector_size
;
823 BytesCopied
= sizeof(FILE_FS_FULL_SIZE_INFORMATION
);
824 Status
= STATUS_SUCCESS
;
829 case FileFsObjectIdInformation
:
831 FILE_FS_OBJECTID_INFORMATION
* ffoi
= Irp
->AssociatedIrp
.SystemBuffer
;
833 TRACE("FileFsObjectIdInformation\n");
835 RtlCopyMemory(ffoi
->ObjectId
, &Vcb
->superblock
.uuid
.uuid
[0], sizeof(UCHAR
) * 16);
836 RtlZeroMemory(ffoi
->ExtendedInfo
, sizeof(ffoi
->ExtendedInfo
));
838 BytesCopied
= sizeof(FILE_FS_OBJECTID_INFORMATION
);
839 Status
= STATUS_SUCCESS
;
844 case FileFsSizeInformation
:
846 FILE_FS_SIZE_INFORMATION
* ffsi
= Irp
->AssociatedIrp
.SystemBuffer
;
848 TRACE("FileFsSizeInformation\n");
850 calculate_total_space(Vcb
, (UINT64
*)&ffsi
->TotalAllocationUnits
.QuadPart
, (UINT64
*)&ffsi
->AvailableAllocationUnits
.QuadPart
);
851 ffsi
->SectorsPerAllocationUnit
= 1;
852 ffsi
->BytesPerSector
= Vcb
->superblock
.sector_size
;
854 BytesCopied
= sizeof(FILE_FS_SIZE_INFORMATION
);
855 Status
= STATUS_SUCCESS
;
860 case FileFsVolumeInformation
:
862 FILE_FS_VOLUME_INFORMATION
* data
= Irp
->AssociatedIrp
.SystemBuffer
;
863 FILE_FS_VOLUME_INFORMATION ffvi
;
864 BOOL overflow
= FALSE
;
865 ULONG label_len
, orig_label_len
;
867 TRACE("FileFsVolumeInformation\n");
868 TRACE("max length = %u\n", IrpSp
->Parameters
.QueryVolume
.Length
);
870 ExAcquireResourceSharedLite(&Vcb
->tree_lock
, TRUE
);
872 Status
= RtlUTF8ToUnicodeN(NULL
, 0, &label_len
, Vcb
->superblock
.label
, (ULONG
)strlen(Vcb
->superblock
.label
));
873 if (!NT_SUCCESS(Status
)) {
874 ERR("RtlUTF8ToUnicodeN returned %08x\n", Status
);
875 ExReleaseResourceLite(&Vcb
->tree_lock
);
879 orig_label_len
= label_len
;
881 if (IrpSp
->Parameters
.QueryVolume
.Length
< sizeof(FILE_FS_VOLUME_INFORMATION
) - sizeof(WCHAR
) + label_len
) {
882 if (IrpSp
->Parameters
.QueryVolume
.Length
> sizeof(FILE_FS_VOLUME_INFORMATION
) - sizeof(WCHAR
))
883 label_len
= IrpSp
->Parameters
.QueryVolume
.Length
- sizeof(FILE_FS_VOLUME_INFORMATION
) + sizeof(WCHAR
);
890 TRACE("label_len = %u\n", label_len
);
892 ffvi
.VolumeCreationTime
.QuadPart
= 0; // FIXME
893 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];
894 ffvi
.VolumeLabelLength
= orig_label_len
;
895 ffvi
.SupportsObjects
= FALSE
;
897 RtlCopyMemory(data
, &ffvi
, min(sizeof(FILE_FS_VOLUME_INFORMATION
) - sizeof(WCHAR
), IrpSp
->Parameters
.QueryVolume
.Length
));
902 Status
= RtlUTF8ToUnicodeN(&data
->VolumeLabel
[0], label_len
, &bytecount
, Vcb
->superblock
.label
, (ULONG
)strlen(Vcb
->superblock
.label
));
903 if (!NT_SUCCESS(Status
) && Status
!= STATUS_BUFFER_TOO_SMALL
) {
904 ERR("RtlUTF8ToUnicodeN returned %08x\n", Status
);
905 ExReleaseResourceLite(&Vcb
->tree_lock
);
909 TRACE("label = %.*S\n", label_len
/ sizeof(WCHAR
), data
->VolumeLabel
);
912 ExReleaseResourceLite(&Vcb
->tree_lock
);
914 BytesCopied
= sizeof(FILE_FS_VOLUME_INFORMATION
) - sizeof(WCHAR
) + label_len
;
915 Status
= overflow
? STATUS_BUFFER_OVERFLOW
: STATUS_SUCCESS
;
920 #ifdef _MSC_VER // not in mingw yet
921 case FileFsSectorSizeInformation
:
923 FILE_FS_SECTOR_SIZE_INFORMATION
* data
= Irp
->AssociatedIrp
.SystemBuffer
;
925 data
->LogicalBytesPerSector
= Vcb
->superblock
.sector_size
;
926 data
->PhysicalBytesPerSectorForAtomicity
= Vcb
->superblock
.sector_size
;
927 data
->PhysicalBytesPerSectorForPerformance
= Vcb
->superblock
.sector_size
;
928 data
->FileSystemEffectivePhysicalBytesPerSectorForAtomicity
= Vcb
->superblock
.sector_size
;
929 data
->ByteOffsetForSectorAlignment
= 0;
930 data
->ByteOffsetForPartitionAlignment
= 0;
932 data
->Flags
= SSINFO_FLAGS_ALIGNED_DEVICE
| SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE
;
934 if (Vcb
->trim
&& !Vcb
->options
.no_trim
)
935 data
->Flags
|= SSINFO_FLAGS_TRIM_ENABLED
;
937 BytesCopied
= sizeof(FILE_FS_SECTOR_SIZE_INFORMATION
);
942 #endif /* __REACTOS__ */
945 Status
= STATUS_INVALID_PARAMETER
;
946 WARN("unknown FsInformationClass %u\n", IrpSp
->Parameters
.QueryVolume
.FsInformationClass
);
950 if (!NT_SUCCESS(Status
) && Status
!= STATUS_BUFFER_OVERFLOW
)
951 Irp
->IoStatus
.Information
= 0;
953 Irp
->IoStatus
.Information
= BytesCopied
;
956 Irp
->IoStatus
.Status
= Status
;
958 IoCompleteRequest( Irp
, IO_DISK_INCREMENT
);
961 IoSetTopLevelIrp(NULL
);
963 TRACE("query volume information returning %08x\n", Status
);
965 FsRtlExitFileSystem();
970 _Function_class_(IO_COMPLETION_ROUTINE
)
972 static NTSTATUS NTAPI
read_completion(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
, _In_ PVOID conptr
) {
974 static NTSTATUS
read_completion(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
, _In_ PVOID conptr
) {
976 read_context
* context
= conptr
;
978 UNUSED(DeviceObject
);
980 context
->iosb
= Irp
->IoStatus
;
981 KeSetEvent(&context
->Event
, 0, FALSE
);
983 return STATUS_MORE_PROCESSING_REQUIRED
;
986 NTSTATUS
create_root(_In_
_Requires_exclusive_lock_held_(_Curr_
->tree_lock
) device_extension
* Vcb
, _In_ UINT64 id
,
987 _Out_ root
** rootptr
, _In_ BOOL no_tree
, _In_ UINT64 offset
, _In_opt_ PIRP Irp
) {
994 r
= ExAllocatePoolWithTag(PagedPool
, sizeof(root
), ALLOC_TAG
);
996 ERR("out of memory\n");
997 return STATUS_INSUFFICIENT_RESOURCES
;
1000 r
->nonpaged
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(root_nonpaged
), ALLOC_TAG
);
1002 ERR("out of memory\n");
1004 return STATUS_INSUFFICIENT_RESOURCES
;
1008 t
= ExAllocatePoolWithTag(PagedPool
, sizeof(tree
), ALLOC_TAG
);
1010 ERR("out of memory\n");
1011 ExFreePool(r
->nonpaged
);
1013 return STATUS_INSUFFICIENT_RESOURCES
;
1016 t
->is_unique
= TRUE
;
1017 t
->uniqueness_determined
= TRUE
;
1021 ri
= ExAllocatePoolWithTag(PagedPool
, sizeof(ROOT_ITEM
), ALLOC_TAG
);
1023 ERR("out of memory\n");
1028 ExFreePool(r
->nonpaged
);
1030 return STATUS_INSUFFICIENT_RESOURCES
;
1034 r
->treeholder
.address
= 0;
1035 r
->treeholder
.generation
= Vcb
->superblock
.generation
;
1036 r
->treeholder
.tree
= t
;
1039 r
->received
= FALSE
;
1043 RtlZeroMemory(&r
->root_item
, sizeof(ROOT_ITEM
));
1044 r
->root_item
.num_references
= 1;
1045 InitializeListHead(&r
->fcbs
);
1047 RtlCopyMemory(ri
, &r
->root_item
, sizeof(ROOT_ITEM
));
1049 // We ask here for a traverse_ptr to the item we're inserting, so we can
1050 // copy some of the tree's variables
1052 Status
= insert_tree_item(Vcb
, Vcb
->root_root
, id
, TYPE_ROOT_ITEM
, offset
, ri
, sizeof(ROOT_ITEM
), &tp
, Irp
);
1053 if (!NT_SUCCESS(Status
)) {
1054 ERR("insert_tree_item returned %08x\n", Status
);
1060 ExFreePool(r
->nonpaged
);
1065 ExInitializeResourceLite(&r
->nonpaged
->load_tree_lock
);
1067 InsertTailList(&Vcb
->roots
, &r
->list_entry
);
1070 RtlZeroMemory(&t
->header
, sizeof(tree_header
));
1071 t
->header
.fs_uuid
= tp
.tree
->header
.fs_uuid
;
1072 t
->header
.address
= 0;
1073 t
->header
.flags
= HEADER_FLAG_MIXED_BACKREF
| 1; // 1 == "written"? Why does the Linux driver record this?
1074 t
->header
.chunk_tree_uuid
= tp
.tree
->header
.chunk_tree_uuid
;
1075 t
->header
.generation
= Vcb
->superblock
.generation
;
1076 t
->header
.tree_id
= id
;
1077 t
->header
.num_items
= 0;
1078 t
->header
.level
= 0;
1080 t
->has_address
= FALSE
;
1087 InitializeListHead(&t
->itemlist
);
1090 t
->has_new_address
= FALSE
;
1091 t
->updated_extents
= FALSE
;
1093 InsertTailList(&Vcb
->trees
, &t
->list_entry
);
1094 t
->list_entry_hash
.Flink
= NULL
;
1097 Vcb
->need_write
= TRUE
;
1102 return STATUS_SUCCESS
;
1105 static NTSTATUS
set_label(_In_ device_extension
* Vcb
, _In_ FILE_FS_LABEL_INFORMATION
* ffli
) {
1110 TRACE("label = %.*S\n", ffli
->VolumeLabelLength
/ sizeof(WCHAR
), ffli
->VolumeLabel
);
1112 vollen
= ffli
->VolumeLabelLength
;
1114 for (i
= 0; i
< ffli
->VolumeLabelLength
/ sizeof(WCHAR
); i
++) {
1115 if (ffli
->VolumeLabel
[i
] == 0) {
1116 vollen
= i
* sizeof(WCHAR
);
1118 } else if (ffli
->VolumeLabel
[i
] == '/' || ffli
->VolumeLabel
[i
] == '\\') {
1119 Status
= STATUS_INVALID_VOLUME_LABEL
;
1127 Status
= RtlUnicodeToUTF8N(NULL
, 0, &utf8len
, ffli
->VolumeLabel
, vollen
);
1128 if (!NT_SUCCESS(Status
))
1131 if (utf8len
> MAX_LABEL_SIZE
) {
1132 Status
= STATUS_INVALID_VOLUME_LABEL
;
1137 ExAcquireResourceExclusiveLite(&Vcb
->tree_lock
, TRUE
);
1140 Status
= RtlUnicodeToUTF8N((PCHAR
)&Vcb
->superblock
.label
, MAX_LABEL_SIZE
, &utf8len
, ffli
->VolumeLabel
, vollen
);
1141 if (!NT_SUCCESS(Status
))
1144 Status
= STATUS_SUCCESS
;
1146 if (utf8len
< MAX_LABEL_SIZE
)
1147 RtlZeroMemory(Vcb
->superblock
.label
+ utf8len
, MAX_LABEL_SIZE
- utf8len
);
1149 Vcb
->need_write
= TRUE
;
1152 ExReleaseResourceLite(&Vcb
->tree_lock
);
1155 TRACE("returning %08x\n", Status
);
1160 _Dispatch_type_(IRP_MJ_SET_VOLUME_INFORMATION
)
1161 _Function_class_(DRIVER_DISPATCH
)
1163 static NTSTATUS NTAPI
drv_set_volume_information(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
1165 static NTSTATUS
drv_set_volume_information(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
1167 PIO_STACK_LOCATION IrpSp
= IoGetCurrentIrpStackLocation(Irp
);
1168 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
1172 FsRtlEnterFileSystem();
1174 TRACE("set volume information\n");
1176 top_level
= is_top_level(Irp
);
1178 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
1179 Status
= vol_set_volume_information(DeviceObject
, Irp
);
1181 } else if (!Vcb
|| Vcb
->type
!= VCB_TYPE_FS
) {
1182 Status
= STATUS_INVALID_PARAMETER
;
1186 Status
= STATUS_NOT_IMPLEMENTED
;
1188 if (Vcb
->readonly
) {
1189 Status
= STATUS_MEDIA_WRITE_PROTECTED
;
1193 if (Vcb
->removing
|| Vcb
->locked
) {
1194 Status
= STATUS_ACCESS_DENIED
;
1198 switch (IrpSp
->Parameters
.SetVolume
.FsInformationClass
) {
1199 case FileFsControlInformation
:
1200 FIXME("STUB: FileFsControlInformation\n");
1203 case FileFsLabelInformation
:
1204 TRACE("FileFsLabelInformation\n");
1206 Status
= set_label(Vcb
, Irp
->AssociatedIrp
.SystemBuffer
);
1209 case FileFsObjectIdInformation
:
1210 FIXME("STUB: FileFsObjectIdInformation\n");
1214 WARN("Unrecognized FsInformationClass 0x%x\n", IrpSp
->Parameters
.SetVolume
.FsInformationClass
);
1219 Irp
->IoStatus
.Status
= Status
;
1220 Irp
->IoStatus
.Information
= 0;
1222 TRACE("returning %08x\n", Status
);
1224 IoCompleteRequest( Irp
, IO_NO_INCREMENT
);
1227 IoSetTopLevelIrp(NULL
);
1229 FsRtlExitFileSystem();
1234 static WCHAR
* file_desc_fcb(_In_ fcb
* fcb
) {
1240 if (fcb
->debug_desc
)
1241 return fcb
->debug_desc
;
1243 if (fcb
== fcb
->Vcb
->volume_fcb
)
1244 return L
"volume FCB";
1246 fcb
->debug_desc
= ExAllocatePoolWithTag(PagedPool
, 60 * sizeof(WCHAR
), ALLOC_TAG
);
1247 if (!fcb
->debug_desc
)
1248 return L
"(memory error)";
1250 // I know this is pretty hackish...
1251 // GCC doesn't like %llx in sprintf, and MSVC won't let us use swprintf
1252 // without the CRT, which breaks drivers.
1254 sprintf(s
, "subvol %x, inode %x", (UINT32
)fcb
->subvol
->id
, (UINT32
)fcb
->inode
);
1257 as
.Length
= as
.MaximumLength
= (USHORT
)strlen(s
);
1259 us
.Buffer
= fcb
->debug_desc
;
1260 us
.MaximumLength
= 60 * sizeof(WCHAR
);
1263 Status
= RtlAnsiStringToUnicodeString(&us
, &as
, FALSE
);
1264 if (!NT_SUCCESS(Status
))
1265 return L
"(RtlAnsiStringToUnicodeString error)";
1267 us
.Buffer
[us
.Length
/ sizeof(WCHAR
)] = 0;
1269 return fcb
->debug_desc
;
1272 WCHAR
* file_desc_fileref(_In_ file_ref
* fileref
) {
1277 if (fileref
->debug_desc
)
1278 return fileref
->debug_desc
;
1280 fn
.Length
= fn
.MaximumLength
= 0;
1281 Status
= fileref_get_filename(fileref
, &fn
, NULL
, &reqlen
);
1282 if (Status
!= STATUS_BUFFER_OVERFLOW
)
1285 if (reqlen
> 0xffff - sizeof(WCHAR
))
1286 return L
"(too long)";
1288 fileref
->debug_desc
= ExAllocatePoolWithTag(PagedPool
, reqlen
+ sizeof(WCHAR
), ALLOC_TAG
);
1289 if (!fileref
->debug_desc
)
1290 return L
"(memory error)";
1292 fn
.Buffer
= fileref
->debug_desc
;
1294 fn
.MaximumLength
= (USHORT
)(reqlen
+ sizeof(WCHAR
));
1296 Status
= fileref_get_filename(fileref
, &fn
, NULL
, &reqlen
);
1297 if (!NT_SUCCESS(Status
)) {
1298 ExFreePool(fileref
->debug_desc
);
1299 fileref
->debug_desc
= NULL
;
1303 fileref
->debug_desc
[fn
.Length
/ sizeof(WCHAR
)] = 0;
1305 return fileref
->debug_desc
;
1309 WCHAR
* file_desc(_In_ PFILE_OBJECT FileObject
) {
1310 fcb
* fcb
= FileObject
->FsContext
;
1311 ccb
* ccb
= FileObject
->FsContext2
;
1312 file_ref
* fileref
= ccb
? ccb
->fileref
: NULL
;
1315 return file_desc_fileref(fileref
);
1317 return file_desc_fcb(fcb
);
1320 void send_notification_fileref(_In_ file_ref
* fileref
, _In_ ULONG filter_match
, _In_ ULONG action
, _In_opt_ PUNICODE_STRING stream
) {
1325 fcb
* fcb
= fileref
->fcb
;
1327 fn
.Length
= fn
.MaximumLength
= 0;
1328 Status
= fileref_get_filename(fileref
, &fn
, NULL
, &reqlen
);
1329 if (Status
!= STATUS_BUFFER_OVERFLOW
) {
1330 ERR("fileref_get_filename returned %08x\n", Status
);
1334 if (reqlen
> 0xffff) {
1335 WARN("reqlen was too long for FsRtlNotifyFilterReportChange\n");
1339 fn
.Buffer
= ExAllocatePoolWithTag(PagedPool
, reqlen
, ALLOC_TAG
);
1341 ERR("out of memory\n");
1345 fn
.MaximumLength
= (USHORT
)reqlen
;
1348 Status
= fileref_get_filename(fileref
, &fn
, &name_offset
, &reqlen
);
1349 if (!NT_SUCCESS(Status
)) {
1350 ERR("fileref_get_filename returned %08x\n", Status
);
1351 ExFreePool(fn
.Buffer
);
1355 FsRtlNotifyFilterReportChange(fcb
->Vcb
->NotifySync
, &fcb
->Vcb
->DirNotifyList
, (PSTRING
)&fn
, name_offset
,
1356 (PSTRING
)stream
, NULL
, filter_match
, action
, NULL
, NULL
);
1357 ExFreePool(fn
.Buffer
);
1360 void send_notification_fcb(_In_ file_ref
* fileref
, _In_ ULONG filter_match
, _In_ ULONG action
, _In_opt_ PUNICODE_STRING stream
) {
1361 fcb
* fcb
= fileref
->fcb
;
1365 // no point looking for hardlinks if st_nlink == 1
1366 if (fileref
->fcb
->inode_item
.st_nlink
== 1) {
1367 send_notification_fileref(fileref
, filter_match
, action
, stream
);
1371 acquire_fcb_lock_exclusive(fcb
->Vcb
);
1373 le
= fcb
->hardlinks
.Flink
;
1374 while (le
!= &fcb
->hardlinks
) {
1375 hardlink
* hl
= CONTAINING_RECORD(le
, hardlink
, list_entry
);
1378 Status
= open_fileref_by_inode(fcb
->Vcb
, fcb
->subvol
, hl
->parent
, &parfr
, NULL
);
1380 if (!NT_SUCCESS(Status
))
1381 ERR("open_fileref_by_inode returned %08x\n", Status
);
1382 else if (!parfr
->deleted
) {
1386 fn
.Length
= fn
.MaximumLength
= 0;
1387 Status
= fileref_get_filename(parfr
, &fn
, NULL
, &pathlen
);
1388 if (Status
!= STATUS_BUFFER_OVERFLOW
) {
1389 ERR("fileref_get_filename returned %08x\n", Status
);
1390 free_fileref(fcb
->Vcb
, parfr
);
1394 if (parfr
!= fcb
->Vcb
->root_fileref
)
1395 pathlen
+= sizeof(WCHAR
);
1397 if (pathlen
+ hl
->name
.Length
> 0xffff) {
1398 WARN("pathlen + hl->name.Length was too long for FsRtlNotifyFilterReportChange\n");
1399 free_fileref(fcb
->Vcb
, parfr
);
1403 fn
.MaximumLength
= (USHORT
)(pathlen
+ hl
->name
.Length
);
1404 fn
.Buffer
= ExAllocatePoolWithTag(PagedPool
, fn
.MaximumLength
, ALLOC_TAG
);
1406 ERR("out of memory\n");
1407 free_fileref(fcb
->Vcb
, parfr
);
1411 Status
= fileref_get_filename(parfr
, &fn
, NULL
, NULL
);
1412 if (!NT_SUCCESS(Status
)) {
1413 ERR("fileref_get_filename returned %08x\n", Status
);
1414 free_fileref(fcb
->Vcb
, parfr
);
1415 ExFreePool(fn
.Buffer
);
1419 if (parfr
!= fcb
->Vcb
->root_fileref
) {
1420 fn
.Buffer
[(pathlen
/ sizeof(WCHAR
)) - 1] = '\\';
1421 fn
.Length
+= sizeof(WCHAR
);
1424 RtlCopyMemory(&fn
.Buffer
[pathlen
/ sizeof(WCHAR
)], hl
->name
.Buffer
, hl
->name
.Length
);
1425 fn
.Length
+= hl
->name
.Length
;
1427 FsRtlNotifyFilterReportChange(fcb
->Vcb
->NotifySync
, &fcb
->Vcb
->DirNotifyList
, (PSTRING
)&fn
, (USHORT
)pathlen
,
1428 (PSTRING
)stream
, NULL
, filter_match
, action
, NULL
, NULL
);
1430 ExFreePool(fn
.Buffer
);
1432 free_fileref(fcb
->Vcb
, parfr
);
1438 release_fcb_lock(fcb
->Vcb
);
1441 void mark_fcb_dirty(_In_ fcb
* fcb
) {
1443 #ifdef DEBUG_FCB_REFCOUNTS
1448 #ifdef DEBUG_FCB_REFCOUNTS
1449 rc
= InterlockedIncrement(&fcb
->refcount
);
1450 WARN("fcb %p: refcount now %i\n", fcb
, rc
);
1452 InterlockedIncrement(&fcb
->refcount
);
1455 ExAcquireResourceExclusiveLite(&fcb
->Vcb
->dirty_fcbs_lock
, TRUE
);
1456 InsertTailList(&fcb
->Vcb
->dirty_fcbs
, &fcb
->list_entry_dirty
);
1457 ExReleaseResourceLite(&fcb
->Vcb
->dirty_fcbs_lock
);
1460 fcb
->Vcb
->need_write
= TRUE
;
1463 void mark_fileref_dirty(_In_ file_ref
* fileref
) {
1464 if (!fileref
->dirty
) {
1465 fileref
->dirty
= TRUE
;
1466 increase_fileref_refcount(fileref
);
1468 ExAcquireResourceExclusiveLite(&fileref
->fcb
->Vcb
->dirty_filerefs_lock
, TRUE
);
1469 InsertTailList(&fileref
->fcb
->Vcb
->dirty_filerefs
, &fileref
->list_entry_dirty
);
1470 ExReleaseResourceLite(&fileref
->fcb
->Vcb
->dirty_filerefs_lock
);
1473 fileref
->fcb
->Vcb
->need_write
= TRUE
;
1476 #ifdef DEBUG_FCB_REFCOUNTS
1477 void _free_fcb(_Requires_exclusive_lock_held_(_Curr_
->fcb_lock
) _In_ device_extension
* Vcb
, _Inout_ fcb
* fcb
, _In_
const char* func
) {
1479 void free_fcb(_Requires_exclusive_lock_held_(_Curr_
->fcb_lock
) _In_ device_extension
* Vcb
, _Inout_ fcb
* fcb
) {
1483 rc
= InterlockedDecrement(&fcb
->refcount
);
1485 #ifdef DEBUG_FCB_REFCOUNTS
1486 #ifdef DEBUG_LONG_MESSAGES
1487 ERR("fcb %p: refcount now %i (subvol %llx, inode %llx)\n", fcb
, rc
, fcb
->subvol
? fcb
->subvol
->id
: 0, fcb
->inode
);
1489 ERR("fcb %p: refcount now %i (subvol %llx, inode %llx)\n", fcb
, rc
, fcb
->subvol
? fcb
->subvol
->id
: 0, fcb
->inode
);
1496 if (fcb
->list_entry
.Flink
)
1497 RemoveEntryList(&fcb
->list_entry
);
1499 if (fcb
->list_entry_all
.Flink
)
1500 RemoveEntryList(&fcb
->list_entry_all
);
1502 ExDeleteResourceLite(&fcb
->nonpaged
->resource
);
1503 ExDeleteResourceLite(&fcb
->nonpaged
->paging_resource
);
1504 ExDeleteResourceLite(&fcb
->nonpaged
->dir_children_lock
);
1506 ExFreeToNPagedLookasideList(&Vcb
->fcb_np_lookaside
, fcb
->nonpaged
);
1509 ExFreePool(fcb
->sd
);
1511 if (fcb
->adsxattr
.Buffer
)
1512 ExFreePool(fcb
->adsxattr
.Buffer
);
1514 if (fcb
->reparse_xattr
.Buffer
)
1515 ExFreePool(fcb
->reparse_xattr
.Buffer
);
1517 if (fcb
->ea_xattr
.Buffer
)
1518 ExFreePool(fcb
->ea_xattr
.Buffer
);
1520 if (fcb
->adsdata
.Buffer
)
1521 ExFreePool(fcb
->adsdata
.Buffer
);
1523 if (fcb
->debug_desc
)
1524 ExFreePool(fcb
->debug_desc
);
1526 while (!IsListEmpty(&fcb
->extents
)) {
1527 LIST_ENTRY
* le
= RemoveHeadList(&fcb
->extents
);
1528 extent
* ext
= CONTAINING_RECORD(le
, extent
, list_entry
);
1531 ExFreePool(ext
->csum
);
1536 while (!IsListEmpty(&fcb
->hardlinks
)) {
1537 LIST_ENTRY
* le
= RemoveHeadList(&fcb
->hardlinks
);
1538 hardlink
* hl
= CONTAINING_RECORD(le
, hardlink
, list_entry
);
1540 if (hl
->name
.Buffer
)
1541 ExFreePool(hl
->name
.Buffer
);
1543 if (hl
->utf8
.Buffer
)
1544 ExFreePool(hl
->utf8
.Buffer
);
1549 while (!IsListEmpty(&fcb
->xattrs
)) {
1550 xattr
* xa
= CONTAINING_RECORD(RemoveHeadList(&fcb
->xattrs
), xattr
, list_entry
);
1555 while (!IsListEmpty(&fcb
->dir_children_index
)) {
1556 LIST_ENTRY
* le
= RemoveHeadList(&fcb
->dir_children_index
);
1557 dir_child
* dc
= CONTAINING_RECORD(le
, dir_child
, list_entry_index
);
1559 ExFreePool(dc
->utf8
.Buffer
);
1560 ExFreePool(dc
->name
.Buffer
);
1561 ExFreePool(dc
->name_uc
.Buffer
);
1566 ExFreePool(fcb
->hash_ptrs
);
1568 if (fcb
->hash_ptrs_uc
)
1569 ExFreePool(fcb
->hash_ptrs_uc
);
1571 FsRtlUninitializeFileLock(&fcb
->lock
);
1573 if (fcb
->pool_type
== NonPagedPool
)
1576 ExFreeToPagedLookasideList(&Vcb
->fcb_lookaside
, fcb
);
1578 #ifdef DEBUG_FCB_REFCOUNTS
1579 #ifdef DEBUG_LONG_MESSAGES
1580 _debug_message(func
, file
, line
, "freeing fcb %p\n", fcb
);
1582 _debug_message(func
, "freeing fcb %p\n", fcb
);
1587 void free_fileref(_Requires_exclusive_lock_held_(_Curr_
->fcb_lock
) _In_ device_extension
* Vcb
, _Inout_ file_ref
* fr
) {
1590 rc
= InterlockedDecrement(&fr
->refcount
);
1592 #ifdef DEBUG_FCB_REFCOUNTS
1593 ERR("fileref %p: refcount now %i\n", fr
, rc
);
1598 ERR("fileref %p: refcount now %i\n", fr
, rc
);
1607 ExAcquireResourceExclusiveLite(&fr
->parent
->nonpaged
->children_lock
, TRUE
);
1609 // FIXME - do we need a file_ref lock?
1611 // FIXME - do delete if needed
1614 ExFreePool(fr
->debug_desc
);
1616 ExDeleteResourceLite(&fr
->nonpaged
->children_lock
);
1617 ExDeleteResourceLite(&fr
->nonpaged
->fileref_lock
);
1619 ExFreeToNPagedLookasideList(&Vcb
->fileref_np_lookaside
, fr
->nonpaged
);
1621 // FIXME - throw error if children not empty
1623 if (fr
->fcb
->fileref
== fr
)
1624 fr
->fcb
->fileref
= NULL
;
1628 fr
->dc
->size
= fr
->fcb
->adsdata
.Length
;
1630 fr
->dc
->fileref
= NULL
;
1633 if (fr
->list_entry
.Flink
)
1634 RemoveEntryList(&fr
->list_entry
);
1637 ExReleaseResourceLite(&fr
->parent
->nonpaged
->children_lock
);
1638 free_fileref(Vcb
, fr
->parent
);
1641 free_fcb(Vcb
, fr
->fcb
);
1643 ExFreeToPagedLookasideList(&Vcb
->fileref_lookaside
, fr
);
1646 static NTSTATUS
close_file(_In_ PFILE_OBJECT FileObject
, _In_ PIRP Irp
) {
1649 file_ref
* fileref
= NULL
;
1651 device_extension
* Vcb
;
1655 TRACE("FileObject = %p\n", FileObject
);
1657 fcb
= FileObject
->FsContext
;
1659 TRACE("FCB was NULL, returning success\n");
1660 return STATUS_SUCCESS
;
1663 open_files
= InterlockedDecrement(&fcb
->Vcb
->open_files
);
1665 ccb
= FileObject
->FsContext2
;
1667 TRACE("close called for %S (fcb == %p)\n", file_desc(FileObject
), fcb
);
1669 // FIXME - make sure notification gets sent if file is being deleted
1672 if (ccb
->query_string
.Buffer
)
1673 RtlFreeUnicodeString(&ccb
->query_string
);
1675 if (ccb
->filename
.Buffer
)
1676 ExFreePool(ccb
->filename
.Buffer
);
1678 // FIXME - use refcounts for fileref
1679 fileref
= ccb
->fileref
;
1681 if (fcb
->Vcb
->running_sends
> 0) {
1682 BOOL send_cancelled
= FALSE
;
1684 ExAcquireResourceExclusiveLite(&fcb
->Vcb
->send_load_lock
, TRUE
);
1687 ccb
->send
->cancelling
= TRUE
;
1688 send_cancelled
= TRUE
;
1689 KeSetEvent(&ccb
->send
->cleared_event
, 0, FALSE
);
1692 ExReleaseResourceLite(&fcb
->Vcb
->send_load_lock
);
1694 if (send_cancelled
) {
1696 ExAcquireResourceExclusiveLite(&fcb
->Vcb
->send_load_lock
, TRUE
);
1697 ExReleaseResourceLite(&fcb
->Vcb
->send_load_lock
);
1705 CcUninitializeCacheMap(FileObject
, NULL
, NULL
);
1707 if (open_files
== 0 && fcb
->Vcb
->removing
) {
1708 uninit(fcb
->Vcb
, FALSE
);
1709 return STATUS_SUCCESS
;
1712 if (!(fcb
->Vcb
->Vpb
->Flags
& VPB_MOUNTED
))
1713 return STATUS_SUCCESS
;
1717 acquire_fcb_lock_exclusive(Vcb
);
1720 free_fileref(fcb
->Vcb
, fileref
);
1724 release_fcb_lock(Vcb
);
1726 return STATUS_SUCCESS
;
1729 void uninit(_In_ device_extension
* Vcb
, _In_ BOOL flush
) {
1735 if (!Vcb
->removing
) {
1736 ExAcquireResourceExclusiveLite(&Vcb
->tree_lock
, TRUE
);
1737 Vcb
->removing
= TRUE
;
1738 ExReleaseResourceLite(&Vcb
->tree_lock
);
1741 RemoveEntryList(&Vcb
->list_entry
);
1743 if (Vcb
->balance
.thread
) {
1744 Vcb
->balance
.paused
= FALSE
;
1745 Vcb
->balance
.stopping
= TRUE
;
1746 KeSetEvent(&Vcb
->balance
.event
, 0, FALSE
);
1747 KeWaitForSingleObject(&Vcb
->balance
.finished
, Executive
, KernelMode
, FALSE
, NULL
);
1750 if (Vcb
->scrub
.thread
) {
1751 Vcb
->scrub
.paused
= FALSE
;
1752 Vcb
->scrub
.stopping
= TRUE
;
1753 KeSetEvent(&Vcb
->scrub
.event
, 0, FALSE
);
1754 KeWaitForSingleObject(&Vcb
->scrub
.finished
, Executive
, KernelMode
, FALSE
, NULL
);
1757 if (Vcb
->running_sends
!= 0) {
1758 BOOL send_cancelled
= FALSE
;
1760 ExAcquireResourceExclusiveLite(&Vcb
->send_load_lock
, TRUE
);
1762 le
= Vcb
->send_ops
.Flink
;
1763 while (le
!= &Vcb
->send_ops
) {
1764 send_info
* send
= CONTAINING_RECORD(le
, send_info
, list_entry
);
1766 if (!send
->cancelling
) {
1767 send
->cancelling
= TRUE
;
1768 send_cancelled
= TRUE
;
1770 KeSetEvent(&send
->cleared_event
, 0, FALSE
);
1776 ExReleaseResourceLite(&Vcb
->send_load_lock
);
1778 if (send_cancelled
) {
1779 while (Vcb
->running_sends
!= 0) {
1780 ExAcquireResourceExclusiveLite(&Vcb
->send_load_lock
, TRUE
);
1781 ExReleaseResourceLite(&Vcb
->send_load_lock
);
1786 Status
= registry_mark_volume_unmounted(&Vcb
->superblock
.uuid
);
1787 if (!NT_SUCCESS(Status
) && Status
!= STATUS_TOO_LATE
)
1788 WARN("registry_mark_volume_unmounted returned %08x\n", Status
);
1791 ExAcquireResourceExclusiveLite(&Vcb
->tree_lock
, TRUE
);
1793 if (Vcb
->need_write
&& !Vcb
->readonly
) {
1794 Status
= do_write(Vcb
, NULL
);
1795 if (!NT_SUCCESS(Status
))
1796 ERR("do_write returned %08x\n", Status
);
1801 ExReleaseResourceLite(&Vcb
->tree_lock
);
1804 for (i
= 0; i
< Vcb
->calcthreads
.num_threads
; i
++) {
1805 Vcb
->calcthreads
.threads
[i
].quit
= TRUE
;
1808 KeSetEvent(&Vcb
->calcthreads
.event
, 0, FALSE
);
1810 for (i
= 0; i
< Vcb
->calcthreads
.num_threads
; i
++) {
1811 KeWaitForSingleObject(&Vcb
->calcthreads
.threads
[i
].finished
, Executive
, KernelMode
, FALSE
, NULL
);
1813 ZwClose(Vcb
->calcthreads
.threads
[i
].handle
);
1816 ExDeleteResourceLite(&Vcb
->calcthreads
.lock
);
1817 ExFreePool(Vcb
->calcthreads
.threads
);
1820 KeSetTimer(&Vcb
->flush_thread_timer
, time
, NULL
); // trigger the timer early
1821 KeWaitForSingleObject(&Vcb
->flush_thread_finished
, Executive
, KernelMode
, FALSE
, NULL
);
1823 acquire_fcb_lock_exclusive(Vcb
);
1824 free_fcb(Vcb
, Vcb
->volume_fcb
);
1825 free_fcb(Vcb
, Vcb
->dummy_fcb
);
1826 release_fcb_lock(Vcb
);
1829 ObDereferenceObject(Vcb
->root_file
);
1831 le
= Vcb
->chunks
.Flink
;
1832 while (le
!= &Vcb
->chunks
) {
1833 chunk
* c
= CONTAINING_RECORD(le
, chunk
, list_entry
);
1836 acquire_fcb_lock_exclusive(Vcb
);
1837 free_fcb(Vcb
, c
->cache
);
1838 release_fcb_lock(Vcb
);
1845 while (!IsListEmpty(&Vcb
->roots
)) {
1846 root
* r
= CONTAINING_RECORD(RemoveHeadList(&Vcb
->roots
), root
, list_entry
);
1848 ExDeleteResourceLite(&r
->nonpaged
->load_tree_lock
);
1849 ExFreePool(r
->nonpaged
);
1853 while (!IsListEmpty(&Vcb
->chunks
)) {
1854 chunk
* c
= CONTAINING_RECORD(RemoveHeadList(&Vcb
->chunks
), chunk
, list_entry
);
1856 while (!IsListEmpty(&c
->space
)) {
1857 LIST_ENTRY
* le2
= RemoveHeadList(&c
->space
);
1858 space
* s
= CONTAINING_RECORD(le2
, space
, list_entry
);
1863 while (!IsListEmpty(&c
->deleting
)) {
1864 LIST_ENTRY
* le2
= RemoveHeadList(&c
->deleting
);
1865 space
* s
= CONTAINING_RECORD(le2
, space
, list_entry
);
1871 ExFreePool(c
->devices
);
1874 acquire_fcb_lock_exclusive(Vcb
);
1875 free_fcb(Vcb
, c
->cache
);
1876 release_fcb_lock(Vcb
);
1879 ExDeleteResourceLite(&c
->range_locks_lock
);
1880 ExDeleteResourceLite(&c
->partial_stripes_lock
);
1881 ExDeleteResourceLite(&c
->lock
);
1882 ExDeleteResourceLite(&c
->changed_extents_lock
);
1884 ExFreePool(c
->chunk_item
);
1888 // FIXME - free any open fcbs?
1890 while (!IsListEmpty(&Vcb
->devices
)) {
1891 device
* dev
= CONTAINING_RECORD(RemoveHeadList(&Vcb
->devices
), device
, list_entry
);
1893 while (!IsListEmpty(&dev
->space
)) {
1894 LIST_ENTRY
* le2
= RemoveHeadList(&dev
->space
);
1895 space
* s
= CONTAINING_RECORD(le2
, space
, list_entry
);
1903 ExAcquireResourceExclusiveLite(&Vcb
->scrub
.stats_lock
, TRUE
);
1904 while (!IsListEmpty(&Vcb
->scrub
.errors
)) {
1905 scrub_error
* err
= CONTAINING_RECORD(RemoveHeadList(&Vcb
->scrub
.errors
), scrub_error
, list_entry
);
1909 ExReleaseResourceLite(&Vcb
->scrub
.stats_lock
);
1911 ExDeleteResourceLite(&Vcb
->fcb_lock
);
1912 ExDeleteResourceLite(&Vcb
->load_lock
);
1913 ExDeleteResourceLite(&Vcb
->tree_lock
);
1914 ExDeleteResourceLite(&Vcb
->chunk_lock
);
1915 ExDeleteResourceLite(&Vcb
->dirty_fcbs_lock
);
1916 ExDeleteResourceLite(&Vcb
->dirty_filerefs_lock
);
1917 ExDeleteResourceLite(&Vcb
->dirty_subvols_lock
);
1918 ExDeleteResourceLite(&Vcb
->scrub
.stats_lock
);
1919 ExDeleteResourceLite(&Vcb
->send_load_lock
);
1921 ExDeletePagedLookasideList(&Vcb
->tree_data_lookaside
);
1922 ExDeletePagedLookasideList(&Vcb
->traverse_ptr_lookaside
);
1923 ExDeletePagedLookasideList(&Vcb
->batch_item_lookaside
);
1924 ExDeletePagedLookasideList(&Vcb
->fileref_lookaside
);
1925 ExDeletePagedLookasideList(&Vcb
->fcb_lookaside
);
1926 ExDeletePagedLookasideList(&Vcb
->name_bit_lookaside
);
1927 ExDeleteNPagedLookasideList(&Vcb
->range_lock_lookaside
);
1928 ExDeleteNPagedLookasideList(&Vcb
->fileref_np_lookaside
);
1929 ExDeleteNPagedLookasideList(&Vcb
->fcb_np_lookaside
);
1931 ZwClose(Vcb
->flush_thread_handle
);
1934 NTSTATUS
delete_fileref(_In_ file_ref
* fileref
, _In_opt_ PFILE_OBJECT FileObject
, _In_opt_ PIRP Irp
, _In_ LIST_ENTRY
* rollback
) {
1935 LARGE_INTEGER newlength
, time
;
1940 KeQuerySystemTime(&time
);
1941 win_time_to_unix(time
, &now
);
1943 ExAcquireResourceExclusiveLite(fileref
->fcb
->Header
.Resource
, TRUE
);
1945 if (fileref
->deleted
) {
1946 ExReleaseResourceLite(fileref
->fcb
->Header
.Resource
);
1947 return STATUS_SUCCESS
;
1950 if (fileref
->fcb
->subvol
->send_ops
> 0) {
1951 ExReleaseResourceLite(fileref
->fcb
->Header
.Resource
);
1952 return STATUS_ACCESS_DENIED
;
1955 fileref
->deleted
= TRUE
;
1956 mark_fileref_dirty(fileref
);
1958 // delete INODE_ITEM (0x1)
1960 TRACE("nlink = %u\n", fileref
->fcb
->inode_item
.st_nlink
);
1962 if (!fileref
->fcb
->ads
) {
1963 if (fileref
->parent
->fcb
->subvol
== fileref
->fcb
->subvol
) {
1966 mark_fcb_dirty(fileref
->fcb
);
1968 fileref
->fcb
->inode_item_changed
= TRUE
;
1970 if (fileref
->fcb
->inode_item
.st_nlink
> 1) {
1971 fileref
->fcb
->inode_item
.st_nlink
--;
1972 fileref
->fcb
->inode_item
.transid
= fileref
->fcb
->Vcb
->superblock
.generation
;
1973 fileref
->fcb
->inode_item
.sequence
++;
1974 fileref
->fcb
->inode_item
.st_ctime
= now
;
1978 if (fileref
->fcb
->type
!= BTRFS_TYPE_DIRECTORY
&& fileref
->fcb
->inode_item
.st_size
> 0) {
1979 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
);
1980 if (!NT_SUCCESS(Status
)) {
1981 ERR("excise_extents returned %08x\n", Status
);
1982 ExReleaseResourceLite(fileref
->fcb
->Header
.Resource
);
1987 fileref
->fcb
->Header
.AllocationSize
.QuadPart
= 0;
1988 fileref
->fcb
->Header
.FileSize
.QuadPart
= 0;
1989 fileref
->fcb
->Header
.ValidDataLength
.QuadPart
= 0;
1994 ccfs
.AllocationSize
= fileref
->fcb
->Header
.AllocationSize
;
1995 ccfs
.FileSize
= fileref
->fcb
->Header
.FileSize
;
1996 ccfs
.ValidDataLength
= fileref
->fcb
->Header
.ValidDataLength
;
1998 Status
= STATUS_SUCCESS
;
2001 CcSetFileSizes(FileObject
, &ccfs
);
2002 } _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER
) {
2003 Status
= _SEH2_GetExceptionCode();
2006 if (!NT_SUCCESS(Status
)) {
2007 ERR("CcSetFileSizes threw exception %08x\n", Status
);
2008 ExReleaseResourceLite(fileref
->fcb
->Header
.Resource
);
2013 fileref
->fcb
->deleted
= TRUE
;
2015 le
= fileref
->children
.Flink
;
2016 while (le
!= &fileref
->children
) {
2017 file_ref
* fr2
= CONTAINING_RECORD(le
, file_ref
, list_entry
);
2019 if (fr2
->fcb
->ads
) {
2020 fr2
->fcb
->deleted
= TRUE
;
2021 mark_fcb_dirty(fr2
->fcb
);
2029 le
= fileref
->fcb
->hardlinks
.Flink
;
2030 while (le
!= &fileref
->fcb
->hardlinks
) {
2031 hardlink
* hl
= CONTAINING_RECORD(le
, hardlink
, list_entry
);
2033 if (hl
->parent
== fileref
->parent
->fcb
->inode
&& hl
->index
== fileref
->dc
->index
) {
2034 RemoveEntryList(&hl
->list_entry
);
2036 if (hl
->name
.Buffer
)
2037 ExFreePool(hl
->name
.Buffer
);
2039 if (hl
->utf8
.Buffer
)
2040 ExFreePool(hl
->utf8
.Buffer
);
2049 } else if (fileref
->fcb
->subvol
->parent
== fileref
->parent
->fcb
->subvol
->id
) { // valid subvolume
2050 if (fileref
->fcb
->subvol
->root_item
.num_references
> 1) {
2051 fileref
->fcb
->subvol
->root_item
.num_references
--;
2053 mark_fcb_dirty(fileref
->fcb
); // so ROOT_ITEM gets updated
2057 // FIXME - we need a lock here
2059 RemoveEntryList(&fileref
->fcb
->subvol
->list_entry
);
2061 InsertTailList(&fileref
->fcb
->Vcb
->drop_roots
, &fileref
->fcb
->subvol
->list_entry
);
2063 le
= fileref
->children
.Flink
;
2064 while (le
!= &fileref
->children
) {
2065 file_ref
* fr2
= CONTAINING_RECORD(le
, file_ref
, list_entry
);
2067 if (fr2
->fcb
->ads
) {
2068 fr2
->fcb
->deleted
= TRUE
;
2069 mark_fcb_dirty(fr2
->fcb
);
2077 fileref
->fcb
->deleted
= TRUE
;
2078 mark_fcb_dirty(fileref
->fcb
);
2081 // remove dir_child from parent
2084 TRACE("delete file %.*S\n", fileref
->dc
->name
.Length
/ sizeof(WCHAR
), fileref
->dc
->name
.Buffer
);
2086 ExAcquireResourceExclusiveLite(&fileref
->parent
->fcb
->nonpaged
->dir_children_lock
, TRUE
);
2087 RemoveEntryList(&fileref
->dc
->list_entry_index
);
2089 if (!fileref
->fcb
->ads
)
2090 remove_dir_child_from_hash_lists(fileref
->parent
->fcb
, fileref
->dc
);
2092 ExReleaseResourceLite(&fileref
->parent
->fcb
->nonpaged
->dir_children_lock
);
2094 if (!fileref
->oldutf8
.Buffer
)
2095 fileref
->oldutf8
= fileref
->dc
->utf8
;
2097 ExFreePool(fileref
->dc
->utf8
.Buffer
);
2099 utf8len
= fileref
->dc
->utf8
.Length
;
2101 fileref
->oldindex
= fileref
->dc
->index
;
2103 ExFreePool(fileref
->dc
->name
.Buffer
);
2104 ExFreePool(fileref
->dc
->name_uc
.Buffer
);
2105 ExFreePool(fileref
->dc
);
2110 // update INODE_ITEM of parent
2112 ExAcquireResourceExclusiveLite(fileref
->parent
->fcb
->Header
.Resource
, TRUE
);
2114 fileref
->parent
->fcb
->inode_item
.transid
= fileref
->fcb
->Vcb
->superblock
.generation
;
2115 fileref
->parent
->fcb
->inode_item
.sequence
++;
2116 fileref
->parent
->fcb
->inode_item
.st_ctime
= now
;
2118 if (!fileref
->fcb
->ads
) {
2119 TRACE("fileref->parent->fcb->inode_item.st_size (inode %llx) was %llx\n", fileref
->parent
->fcb
->inode
, fileref
->parent
->fcb
->inode_item
.st_size
);
2120 fileref
->parent
->fcb
->inode_item
.st_size
-= utf8len
* 2;
2121 TRACE("fileref->parent->fcb->inode_item.st_size (inode %llx) now %llx\n", fileref
->parent
->fcb
->inode
, fileref
->parent
->fcb
->inode_item
.st_size
);
2122 fileref
->parent
->fcb
->inode_item
.st_mtime
= now
;
2125 fileref
->parent
->fcb
->inode_item_changed
= TRUE
;
2126 ExReleaseResourceLite(fileref
->parent
->fcb
->Header
.Resource
);
2128 if (!fileref
->fcb
->ads
&& fileref
->parent
->dc
)
2129 send_notification_fcb(fileref
->parent
, FILE_NOTIFY_CHANGE_LAST_WRITE
, FILE_ACTION_MODIFIED
, NULL
);
2131 mark_fcb_dirty(fileref
->parent
->fcb
);
2133 fileref
->fcb
->subvol
->root_item
.ctransid
= fileref
->fcb
->Vcb
->superblock
.generation
;
2134 fileref
->fcb
->subvol
->root_item
.ctime
= now
;
2136 newlength
.QuadPart
= 0;
2138 if (FileObject
&& !CcUninitializeCacheMap(FileObject
, &newlength
, NULL
))
2139 TRACE("CcUninitializeCacheMap failed\n");
2141 ExReleaseResourceLite(fileref
->fcb
->Header
.Resource
);
2143 return STATUS_SUCCESS
;
2146 _Dispatch_type_(IRP_MJ_CLEANUP
)
2147 _Function_class_(DRIVER_DISPATCH
)
2149 static NTSTATUS NTAPI
drv_cleanup(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
2151 static NTSTATUS
drv_cleanup(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
2154 PIO_STACK_LOCATION IrpSp
= IoGetCurrentIrpStackLocation(Irp
);
2155 PFILE_OBJECT FileObject
= IrpSp
->FileObject
;
2156 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
2157 fcb
* fcb
= FileObject
->FsContext
;
2160 FsRtlEnterFileSystem();
2164 top_level
= is_top_level(Irp
);
2166 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
2167 Status
= vol_cleanup(DeviceObject
, Irp
);
2169 } else if (DeviceObject
== master_devobj
) {
2170 TRACE("closing file system\n");
2171 Status
= STATUS_SUCCESS
;
2173 } else if (!Vcb
|| Vcb
->type
!= VCB_TYPE_FS
) {
2174 Status
= STATUS_INVALID_PARAMETER
;
2178 if (FileObject
->Flags
& FO_CLEANUP_COMPLETE
) {
2179 TRACE("FileObject %p already cleaned up\n", FileObject
);
2180 Status
= STATUS_SUCCESS
;
2185 ERR("fcb was NULL\n");
2186 Status
= STATUS_INVALID_PARAMETER
;
2190 // We have to use the pointer to Vcb stored in the fcb, as we can receive cleanup
2191 // messages belonging to other devices.
2193 if (FileObject
&& FileObject
->FsContext
) {
2199 ccb
= FileObject
->FsContext2
;
2200 fileref
= ccb
? ccb
->fileref
: NULL
;
2202 TRACE("cleanup called for FileObject %p\n", FileObject
);
2203 TRACE("fileref %p (%S), refcount = %u, open_count = %u\n", fileref
, file_desc(FileObject
), fileref
? fileref
->refcount
: 0, fileref
? fileref
->open_count
: 0);
2205 ExAcquireResourceSharedLite(&fcb
->Vcb
->tree_lock
, TRUE
);
2207 ExAcquireResourceExclusiveLite(fcb
->Header
.Resource
, TRUE
);
2209 IoRemoveShareAccess(FileObject
, &fcb
->share_access
);
2212 FsRtlNotifyCleanup(fcb
->Vcb
->NotifySync
, &fcb
->Vcb
->DirNotifyList
, ccb
);
2215 oc
= InterlockedDecrement(&fileref
->open_count
);
2216 #ifdef DEBUG_FCB_REFCOUNTS
2217 ERR("fileref %p: open_count now %i\n", fileref
, oc
);
2221 if (ccb
&& ccb
->options
& FILE_DELETE_ON_CLOSE
&& fileref
)
2222 fileref
->delete_on_close
= TRUE
;
2224 if (fileref
&& fileref
->delete_on_close
&& fcb
->type
== BTRFS_TYPE_DIRECTORY
&& fcb
->inode_item
.st_size
> 0 && fcb
!= fcb
->Vcb
->dummy_fcb
)
2225 fileref
->delete_on_close
= FALSE
;
2227 if (fcb
->Vcb
->locked
&& fcb
->Vcb
->locked_fileobj
== FileObject
) {
2228 TRACE("unlocking volume\n");
2229 do_unlock_volume(fcb
->Vcb
);
2230 FsRtlNotifyVolumeEvent(FileObject
, FSRTL_VOLUME_UNLOCK
);
2233 if (ccb
&& ccb
->reserving
) {
2234 fcb
->subvol
->reserved
= NULL
;
2235 ccb
->reserving
= FALSE
;
2236 // FIXME - flush all of subvol's fcbs
2239 if (fileref
&& oc
== 0) {
2240 if (!fcb
->Vcb
->removing
) {
2241 if (fileref
&& fileref
->delete_on_close
&& fileref
!= fcb
->Vcb
->root_fileref
&& fcb
!= fcb
->Vcb
->volume_fcb
) {
2242 LIST_ENTRY rollback
;
2244 InitializeListHead(&rollback
);
2246 if (!fileref
->fcb
->ads
|| fileref
->dc
) {
2247 if (fileref
->fcb
->ads
) {
2248 send_notification_fileref(fileref
->parent
, fcb
->type
== BTRFS_TYPE_DIRECTORY
? FILE_NOTIFY_CHANGE_DIR_NAME
: FILE_NOTIFY_CHANGE_FILE_NAME
,
2249 FILE_ACTION_REMOVED
, &fileref
->dc
->name
);
2251 send_notification_fileref(fileref
, fcb
->type
== BTRFS_TYPE_DIRECTORY
? FILE_NOTIFY_CHANGE_DIR_NAME
: FILE_NOTIFY_CHANGE_FILE_NAME
, FILE_ACTION_REMOVED
, NULL
);
2254 ExReleaseResourceLite(fcb
->Header
.Resource
);
2257 // fcb_lock needs to be acquired before fcb->Header.Resource
2258 acquire_fcb_lock_exclusive(fcb
->Vcb
);
2260 Status
= delete_fileref(fileref
, FileObject
, Irp
, &rollback
);
2261 if (!NT_SUCCESS(Status
)) {
2262 ERR("delete_fileref returned %08x\n", Status
);
2263 do_rollback(fcb
->Vcb
, &rollback
);
2264 release_fcb_lock(fcb
->Vcb
);
2265 ExReleaseResourceLite(&fcb
->Vcb
->tree_lock
);
2269 release_fcb_lock(fcb
->Vcb
);
2273 clear_rollback(&rollback
);
2274 } else if (FileObject
->Flags
& FO_CACHE_SUPPORTED
&& fcb
->nonpaged
->segment_object
.DataSectionObject
) {
2275 IO_STATUS_BLOCK iosb
;
2276 CcFlushCache(FileObject
->SectionObjectPointer
, NULL
, 0, &iosb
);
2278 if (!NT_SUCCESS(iosb
.Status
)) {
2279 ERR("CcFlushCache returned %08x\n", iosb
.Status
);
2282 if (!ExIsResourceAcquiredSharedLite(fcb
->Header
.PagingIoResource
)) {
2283 ExAcquireResourceExclusiveLite(fcb
->Header
.PagingIoResource
, TRUE
);
2284 ExReleaseResourceLite(fcb
->Header
.PagingIoResource
);
2287 CcPurgeCacheSection(&fcb
->nonpaged
->segment_object
, NULL
, 0, FALSE
);
2289 TRACE("flushed cache on close (FileObject = %p, fcb = %p, AllocationSize = %llx, FileSize = %llx, ValidDataLength = %llx)\n",
2290 FileObject
, fcb
, fcb
->Header
.AllocationSize
.QuadPart
, fcb
->Header
.FileSize
.QuadPart
, fcb
->Header
.ValidDataLength
.QuadPart
);
2294 if (fcb
->Vcb
&& fcb
!= fcb
->Vcb
->volume_fcb
)
2295 CcUninitializeCacheMap(FileObject
, NULL
, NULL
);
2299 ExReleaseResourceLite(fcb
->Header
.Resource
);
2301 ExReleaseResourceLite(&fcb
->Vcb
->tree_lock
);
2303 FileObject
->Flags
|= FO_CLEANUP_COMPLETE
;
2306 Status
= STATUS_SUCCESS
;
2309 TRACE("returning %08x\n", Status
);
2311 Irp
->IoStatus
.Status
= Status
;
2312 Irp
->IoStatus
.Information
= 0;
2314 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
2317 IoSetTopLevelIrp(NULL
);
2319 FsRtlExitFileSystem();
2325 BOOL
get_file_attributes_from_xattr(_In_reads_bytes_(len
) char* val
, _In_ UINT16 len
, _Out_ ULONG
* atts
) {
2326 if (len
> 2 && val
[0] == '0' && val
[1] == 'x') {
2330 for (i
= 2; i
< len
; i
++) {
2333 if (val
[i
] >= '0' && val
[i
] <= '9')
2334 dosnum
|= val
[i
] - '0';
2335 else if (val
[i
] >= 'a' && val
[i
] <= 'f')
2336 dosnum
|= val
[i
] + 10 - 'a';
2337 else if (val
[i
] >= 'A' && val
[i
] <= 'F')
2338 dosnum
|= val
[i
] + 10 - 'a';
2341 TRACE("DOSATTRIB: %08x\n", dosnum
);
2351 ULONG
get_file_attributes(_In_
_Requires_lock_held_(_Curr_
->tree_lock
) device_extension
* Vcb
, _In_ root
* r
, _In_ UINT64 inode
,
2352 _In_ UINT8 type
, _In_ BOOL dotfile
, _In_ BOOL ignore_xa
, _In_opt_ PIRP Irp
) {
2357 if (!ignore_xa
&& get_xattr(Vcb
, r
, inode
, EA_DOSATTRIB
, EA_DOSATTRIB_HASH
, (UINT8
**)&eaval
, &ealen
, Irp
)) {
2360 if (get_file_attributes_from_xattr(eaval
, ealen
, &dosnum
)) {
2363 if (type
== BTRFS_TYPE_DIRECTORY
)
2364 dosnum
|= FILE_ATTRIBUTE_DIRECTORY
;
2365 else if (type
== BTRFS_TYPE_SYMLINK
)
2366 dosnum
|= FILE_ATTRIBUTE_REPARSE_POINT
;
2368 if (type
!= BTRFS_TYPE_DIRECTORY
)
2369 dosnum
&= ~FILE_ATTRIBUTE_DIRECTORY
;
2371 if (inode
== SUBVOL_ROOT_INODE
) {
2372 if (r
->root_item
.flags
& BTRFS_SUBVOL_READONLY
)
2373 dosnum
|= FILE_ATTRIBUTE_READONLY
;
2375 dosnum
&= ~FILE_ATTRIBUTE_READONLY
;
2385 case BTRFS_TYPE_DIRECTORY
:
2386 att
= FILE_ATTRIBUTE_DIRECTORY
;
2389 case BTRFS_TYPE_SYMLINK
:
2390 att
= FILE_ATTRIBUTE_REPARSE_POINT
;
2399 att
|= FILE_ATTRIBUTE_HIDDEN
;
2402 att
|= FILE_ATTRIBUTE_ARCHIVE
;
2404 if (inode
== SUBVOL_ROOT_INODE
) {
2405 if (r
->root_item
.flags
& BTRFS_SUBVOL_READONLY
)
2406 att
|= FILE_ATTRIBUTE_READONLY
;
2408 att
&= ~FILE_ATTRIBUTE_READONLY
;
2411 // FIXME - get READONLY from ii->st_mode
2412 // FIXME - return SYSTEM for block/char devices?
2415 att
= FILE_ATTRIBUTE_NORMAL
;
2420 NTSTATUS
sync_read_phys(_In_ PDEVICE_OBJECT DeviceObject
, _In_ UINT64 StartingOffset
, _In_ ULONG Length
,
2421 _Out_writes_bytes_(Length
) PUCHAR Buffer
, _In_ BOOL override
) {
2422 IO_STATUS_BLOCK IoStatus
;
2423 LARGE_INTEGER Offset
;
2425 PIO_STACK_LOCATION IrpSp
;
2427 read_context context
;
2431 RtlZeroMemory(&context
, sizeof(read_context
));
2432 KeInitializeEvent(&context
.Event
, NotificationEvent
, FALSE
);
2434 Offset
.QuadPart
= (LONGLONG
)StartingOffset
;
2436 Irp
= IoAllocateIrp(DeviceObject
->StackSize
, FALSE
);
2439 ERR("IoAllocateIrp failed\n");
2440 return STATUS_INSUFFICIENT_RESOURCES
;
2443 Irp
->Flags
|= IRP_NOCACHE
;
2444 IrpSp
= IoGetNextIrpStackLocation(Irp
);
2445 IrpSp
->MajorFunction
= IRP_MJ_READ
;
2448 IrpSp
->Flags
|= SL_OVERRIDE_VERIFY_VOLUME
;
2450 if (DeviceObject
->Flags
& DO_BUFFERED_IO
) {
2451 Irp
->AssociatedIrp
.SystemBuffer
= ExAllocatePoolWithTag(NonPagedPool
, Length
, ALLOC_TAG
);
2452 if (!Irp
->AssociatedIrp
.SystemBuffer
) {
2453 ERR("out of memory\n");
2454 Status
= STATUS_INSUFFICIENT_RESOURCES
;
2458 Irp
->Flags
|= IRP_BUFFERED_IO
| IRP_DEALLOCATE_BUFFER
| IRP_INPUT_OPERATION
;
2460 Irp
->UserBuffer
= Buffer
;
2461 } else if (DeviceObject
->Flags
& DO_DIRECT_IO
) {
2462 Irp
->MdlAddress
= IoAllocateMdl(Buffer
, Length
, FALSE
, FALSE
, NULL
);
2463 if (!Irp
->MdlAddress
) {
2464 ERR("IoAllocateMdl failed\n");
2465 Status
= STATUS_INSUFFICIENT_RESOURCES
;
2469 Status
= STATUS_SUCCESS
;
2472 MmProbeAndLockPages(Irp
->MdlAddress
, KernelMode
, IoWriteAccess
);
2473 } _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER
) {
2474 Status
= _SEH2_GetExceptionCode();
2477 if (!NT_SUCCESS(Status
)) {
2478 ERR("MmProbeAndLockPages threw exception %08x\n", Status
);
2479 IoFreeMdl(Irp
->MdlAddress
);
2483 Irp
->UserBuffer
= Buffer
;
2485 IrpSp
->Parameters
.Read
.Length
= Length
;
2486 IrpSp
->Parameters
.Read
.ByteOffset
= Offset
;
2488 Irp
->UserIosb
= &IoStatus
;
2490 Irp
->UserEvent
= &context
.Event
;
2492 IoSetCompletionRoutine(Irp
, read_completion
, &context
, TRUE
, TRUE
, TRUE
);
2494 Status
= IoCallDriver(DeviceObject
, Irp
);
2496 if (Status
== STATUS_PENDING
) {
2497 KeWaitForSingleObject(&context
.Event
, Executive
, KernelMode
, FALSE
, NULL
);
2498 Status
= context
.iosb
.Status
;
2501 if (DeviceObject
->Flags
& DO_DIRECT_IO
) {
2502 MmUnlockPages(Irp
->MdlAddress
);
2503 IoFreeMdl(Irp
->MdlAddress
);
2512 static NTSTATUS
read_superblock(_In_ device_extension
* Vcb
, _In_ PDEVICE_OBJECT device
, _In_ UINT64 length
) {
2516 UINT8 valid_superblocks
;
2518 to_read
= device
->SectorSize
== 0 ? sizeof(superblock
) : (ULONG
)sector_align(sizeof(superblock
), device
->SectorSize
);
2520 sb
= ExAllocatePoolWithTag(NonPagedPool
, to_read
, ALLOC_TAG
);
2522 ERR("out of memory\n");
2523 return STATUS_INSUFFICIENT_RESOURCES
;
2526 if (superblock_addrs
[0] + to_read
> length
) {
2527 WARN("device was too short to have any superblock\n");
2529 return STATUS_UNRECOGNIZED_VOLUME
;
2533 valid_superblocks
= 0;
2535 while (superblock_addrs
[i
] > 0) {
2538 if (i
> 0 && superblock_addrs
[i
] + to_read
> length
)
2541 Status
= sync_read_phys(device
, superblock_addrs
[i
], to_read
, (PUCHAR
)sb
, FALSE
);
2542 if (!NT_SUCCESS(Status
)) {
2543 ERR("Failed to read superblock %u: %08x\n", i
, Status
);
2548 if (sb
->magic
!= BTRFS_MAGIC
) {
2550 TRACE("not a BTRFS volume\n");
2552 return STATUS_UNRECOGNIZED_VOLUME
;
2555 TRACE("got superblock %u!\n", i
);
2557 crc32
= ~calc_crc32c(0xffffffff, (UINT8
*)&sb
->uuid
, (ULONG
)sizeof(superblock
) - sizeof(sb
->checksum
));
2559 if (crc32
!= *((UINT32
*)sb
->checksum
))
2560 WARN("crc32 was %08x, expected %08x\n", crc32
, *((UINT32
*)sb
->checksum
));
2561 else if (sb
->sector_size
== 0)
2562 WARN("superblock sector size was 0\n");
2563 else if (sb
->node_size
< sizeof(tree_header
) + sizeof(internal_node
) || sb
->node_size
> 0x10000)
2564 WARN("invalid node size %x\n", sb
->node_size
);
2565 else if ((sb
->node_size
% sb
->sector_size
) != 0)
2566 WARN("node size %x was not a multiple of sector_size %x\n", sb
->node_size
, sb
->sector_size
);
2567 else if (valid_superblocks
== 0 || sb
->generation
> Vcb
->superblock
.generation
) {
2568 RtlCopyMemory(&Vcb
->superblock
, sb
, sizeof(superblock
));
2569 valid_superblocks
++;
2578 if (valid_superblocks
== 0) {
2579 ERR("could not find any valid superblocks\n");
2580 return STATUS_INTERNAL_ERROR
;
2583 TRACE("label is %s\n", Vcb
->superblock
.label
);
2585 return STATUS_SUCCESS
;
2588 NTSTATUS
dev_ioctl(_In_ PDEVICE_OBJECT DeviceObject
, _In_ ULONG ControlCode
, _In_reads_bytes_opt_(InputBufferSize
) PVOID InputBuffer
, _In_ ULONG InputBufferSize
,
2589 _Out_writes_bytes_opt_(OutputBufferSize
) PVOID OutputBuffer
, _In_ ULONG OutputBufferSize
, _In_ BOOLEAN Override
, _Out_opt_ IO_STATUS_BLOCK
* iosb
) {
2593 PIO_STACK_LOCATION IrpSp
;
2594 IO_STATUS_BLOCK IoStatus
;
2596 KeInitializeEvent(&Event
, NotificationEvent
, FALSE
);
2598 Irp
= IoBuildDeviceIoControlRequest(ControlCode
,
2608 if (!Irp
) return STATUS_INSUFFICIENT_RESOURCES
;
2611 IrpSp
= IoGetNextIrpStackLocation(Irp
);
2612 IrpSp
->Flags
|= SL_OVERRIDE_VERIFY_VOLUME
;
2615 Status
= IoCallDriver(DeviceObject
, Irp
);
2617 if (Status
== STATUS_PENDING
) {
2618 KeWaitForSingleObject(&Event
, Executive
, KernelMode
, FALSE
, NULL
);
2619 Status
= IoStatus
.Status
;
2628 _Requires_exclusive_lock_held_(Vcb
->tree_lock
)
2629 static NTSTATUS
add_root(_Inout_ device_extension
* Vcb
, _In_ UINT64 id
, _In_ UINT64 addr
,
2630 _In_ UINT64 generation
, _In_opt_ traverse_ptr
* tp
) {
2631 root
* r
= ExAllocatePoolWithTag(PagedPool
, sizeof(root
), ALLOC_TAG
);
2633 ERR("out of memory\n");
2634 return STATUS_INSUFFICIENT_RESOURCES
;
2639 r
->received
= FALSE
;
2641 r
->treeholder
.address
= addr
;
2642 r
->treeholder
.tree
= NULL
;
2643 r
->treeholder
.generation
= generation
;
2646 InitializeListHead(&r
->fcbs
);
2648 r
->nonpaged
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(root_nonpaged
), ALLOC_TAG
);
2650 ERR("out of memory\n");
2652 return STATUS_INSUFFICIENT_RESOURCES
;
2655 ExInitializeResourceLite(&r
->nonpaged
->load_tree_lock
);
2660 RtlCopyMemory(&r
->root_item
, tp
->item
->data
, min(sizeof(ROOT_ITEM
), tp
->item
->size
));
2661 if (tp
->item
->size
< sizeof(ROOT_ITEM
))
2662 RtlZeroMemory(((UINT8
*)&r
->root_item
) + tp
->item
->size
, sizeof(ROOT_ITEM
) - tp
->item
->size
);
2664 RtlZeroMemory(&r
->root_item
, sizeof(ROOT_ITEM
));
2666 if (!Vcb
->readonly
&& (r
->id
== BTRFS_ROOT_ROOT
|| r
->id
== BTRFS_ROOT_FSTREE
|| (r
->id
>= 0x100 && !(r
->id
& 0xf000000000000000)))) { // FS tree root
2667 // FIXME - don't call this if subvol is readonly (though we will have to if we ever toggle this flag)
2668 get_last_inode(Vcb
, r
, NULL
);
2670 if (r
->id
== BTRFS_ROOT_ROOT
&& r
->lastinode
< 0x100)
2671 r
->lastinode
= 0x100;
2674 InsertTailList(&Vcb
->roots
, &r
->list_entry
);
2677 case BTRFS_ROOT_ROOT
:
2681 case BTRFS_ROOT_EXTENT
:
2682 Vcb
->extent_root
= r
;
2685 case BTRFS_ROOT_CHUNK
:
2686 Vcb
->chunk_root
= r
;
2689 case BTRFS_ROOT_DEVTREE
:
2693 case BTRFS_ROOT_CHECKSUM
:
2694 Vcb
->checksum_root
= r
;
2697 case BTRFS_ROOT_UUID
:
2701 case BTRFS_ROOT_FREE_SPACE
:
2702 Vcb
->space_root
= r
;
2705 case BTRFS_ROOT_DATA_RELOC
:
2706 Vcb
->data_reloc_root
= r
;
2710 return STATUS_SUCCESS
;
2713 static NTSTATUS
look_for_roots(_Requires_exclusive_lock_held_(_Curr_
->tree_lock
) _In_ device_extension
* Vcb
, _In_opt_ PIRP Irp
) {
2714 traverse_ptr tp
, next_tp
;
2719 searchkey
.obj_id
= 0;
2720 searchkey
.obj_type
= 0;
2721 searchkey
.offset
= 0;
2723 Status
= find_item(Vcb
, Vcb
->root_root
, &tp
, &searchkey
, FALSE
, Irp
);
2724 if (!NT_SUCCESS(Status
)) {
2725 ERR("error - find_item returned %08x\n", Status
);
2730 TRACE("(%llx,%x,%llx)\n", tp
.item
->key
.obj_id
, tp
.item
->key
.obj_type
, tp
.item
->key
.offset
);
2732 if (tp
.item
->key
.obj_type
== TYPE_ROOT_ITEM
) {
2733 ROOT_ITEM
* ri
= (ROOT_ITEM
*)tp
.item
->data
;
2735 if (tp
.item
->size
< offsetof(ROOT_ITEM
, byte_limit
)) {
2736 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
));
2738 TRACE("root %llx - address %llx\n", tp
.item
->key
.obj_id
, ri
->block_number
);
2740 Status
= add_root(Vcb
, tp
.item
->key
.obj_id
, ri
->block_number
, ri
->generation
, &tp
);
2741 if (!NT_SUCCESS(Status
)) {
2742 ERR("add_root returned %08x\n", Status
);
2746 } else if (tp
.item
->key
.obj_type
== TYPE_ROOT_BACKREF
&& !IsListEmpty(&Vcb
->roots
)) {
2747 root
* lastroot
= CONTAINING_RECORD(Vcb
->roots
.Blink
, root
, list_entry
);
2749 if (lastroot
->id
== tp
.item
->key
.obj_id
)
2750 lastroot
->parent
= tp
.item
->key
.offset
;
2753 b
= find_next_item(Vcb
, &tp
, &next_tp
, FALSE
, Irp
);
2759 if (!Vcb
->readonly
&& !Vcb
->data_reloc_root
) {
2767 WARN("data reloc root doesn't exist, creating it\n");
2769 Status
= create_root(Vcb
, BTRFS_ROOT_DATA_RELOC
, &reloc_root
, FALSE
, 0, Irp
);
2771 if (!NT_SUCCESS(Status
)) {
2772 ERR("create_root returned %08x\n", Status
);
2776 reloc_root
->root_item
.inode
.generation
= 1;
2777 reloc_root
->root_item
.inode
.st_size
= 3;
2778 reloc_root
->root_item
.inode
.st_blocks
= Vcb
->superblock
.node_size
;
2779 reloc_root
->root_item
.inode
.st_nlink
= 1;
2780 reloc_root
->root_item
.inode
.st_mode
= 040755;
2781 reloc_root
->root_item
.inode
.flags
= 0xffffffff80000000;
2782 reloc_root
->root_item
.objid
= SUBVOL_ROOT_INODE
;
2783 reloc_root
->root_item
.bytes_used
= Vcb
->superblock
.node_size
;
2785 ii
= ExAllocatePoolWithTag(PagedPool
, sizeof(INODE_ITEM
), ALLOC_TAG
);
2787 ERR("out of memory\n");
2788 return STATUS_INSUFFICIENT_RESOURCES
;
2791 KeQuerySystemTime(&time
);
2792 win_time_to_unix(time
, &now
);
2794 RtlZeroMemory(ii
, sizeof(INODE_ITEM
));
2795 ii
->generation
= Vcb
->superblock
.generation
;
2796 ii
->st_blocks
= Vcb
->superblock
.node_size
;
2798 ii
->st_mode
= 040755;
2803 Status
= insert_tree_item(Vcb
, reloc_root
, SUBVOL_ROOT_INODE
, TYPE_INODE_ITEM
, 0, ii
, sizeof(INODE_ITEM
), NULL
, Irp
);
2804 if (!NT_SUCCESS(Status
)) {
2805 ERR("insert_tree_item returned %08x\n", Status
);
2810 irlen
= (UINT16
)offsetof(INODE_REF
, name
[0]) + 2;
2811 ir
= ExAllocatePoolWithTag(PagedPool
, irlen
, ALLOC_TAG
);
2813 ERR("out of memory\n");
2814 return STATUS_INSUFFICIENT_RESOURCES
;
2822 Status
= insert_tree_item(Vcb
, reloc_root
, SUBVOL_ROOT_INODE
, TYPE_INODE_REF
, SUBVOL_ROOT_INODE
, ir
, irlen
, NULL
, Irp
);
2823 if (!NT_SUCCESS(Status
)) {
2824 ERR("insert_tree_item returned %08x\n", Status
);
2829 Vcb
->data_reloc_root
= reloc_root
;
2830 Vcb
->need_write
= TRUE
;
2833 return STATUS_SUCCESS
;
2836 static NTSTATUS
find_disk_holes(_In_
_Requires_lock_held_(_Curr_
->tree_lock
) device_extension
* Vcb
, _In_ device
* dev
, _In_opt_ PIRP Irp
) {
2838 traverse_ptr tp
, next_tp
;
2843 InitializeListHead(&dev
->space
);
2845 searchkey
.obj_id
= 0;
2846 searchkey
.obj_type
= TYPE_DEV_STATS
;
2847 searchkey
.offset
= dev
->devitem
.dev_id
;
2849 Status
= find_item(Vcb
, Vcb
->dev_root
, &tp
, &searchkey
, FALSE
, Irp
);
2850 if (NT_SUCCESS(Status
) && !keycmp(tp
.item
->key
, searchkey
))
2851 RtlCopyMemory(dev
->stats
, tp
.item
->data
, min(sizeof(UINT64
) * 5, tp
.item
->size
));
2853 searchkey
.obj_id
= dev
->devitem
.dev_id
;
2854 searchkey
.obj_type
= TYPE_DEV_EXTENT
;
2855 searchkey
.offset
= 0;
2857 Status
= find_item(Vcb
, Vcb
->dev_root
, &tp
, &searchkey
, FALSE
, Irp
);
2858 if (!NT_SUCCESS(Status
)) {
2859 ERR("error - find_item returned %08x\n", Status
);
2866 if (tp
.item
->key
.obj_id
== dev
->devitem
.dev_id
&& tp
.item
->key
.obj_type
== TYPE_DEV_EXTENT
) {
2867 if (tp
.item
->size
>= sizeof(DEV_EXTENT
)) {
2868 DEV_EXTENT
* de
= (DEV_EXTENT
*)tp
.item
->data
;
2870 if (tp
.item
->key
.offset
> lastaddr
) {
2871 Status
= add_space_entry(&dev
->space
, NULL
, lastaddr
, tp
.item
->key
.offset
- lastaddr
);
2872 if (!NT_SUCCESS(Status
)) {
2873 ERR("add_space_entry returned %08x\n", Status
);
2878 lastaddr
= tp
.item
->key
.offset
+ de
->length
;
2880 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
));
2884 b
= find_next_item(Vcb
, &tp
, &next_tp
, FALSE
, Irp
);
2888 if (tp
.item
->key
.obj_id
> searchkey
.obj_id
|| tp
.item
->key
.obj_type
> searchkey
.obj_type
)
2893 if (lastaddr
< dev
->devitem
.num_bytes
) {
2894 Status
= add_space_entry(&dev
->space
, NULL
, lastaddr
, dev
->devitem
.num_bytes
- lastaddr
);
2895 if (!NT_SUCCESS(Status
)) {
2896 ERR("add_space_entry returned %08x\n", Status
);
2901 // The Linux driver doesn't like to allocate chunks within the first megabyte of a device.
2903 space_list_subtract2(&dev
->space
, NULL
, 0, 0x100000, NULL
, NULL
);
2905 return STATUS_SUCCESS
;
2908 static void add_device_to_list(_In_ device_extension
* Vcb
, _In_ device
* dev
) {
2911 le
= Vcb
->devices
.Flink
;
2913 while (le
!= &Vcb
->devices
) {
2914 device
* dev2
= CONTAINING_RECORD(le
, device
, list_entry
);
2916 if (dev2
->devitem
.dev_id
> dev
->devitem
.dev_id
) {
2917 InsertHeadList(le
->Blink
, &dev
->list_entry
);
2924 InsertTailList(&Vcb
->devices
, &dev
->list_entry
);
2928 device
* find_device_from_uuid(_In_ device_extension
* Vcb
, _In_ BTRFS_UUID
* uuid
) {
2929 volume_device_extension
* vde
;
2930 pdo_device_extension
* pdode
;
2933 le
= Vcb
->devices
.Flink
;
2934 while (le
!= &Vcb
->devices
) {
2935 device
* dev
= CONTAINING_RECORD(le
, device
, list_entry
);
2937 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
,
2938 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],
2939 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]);
2941 if (RtlCompareMemory(&dev
->devitem
.device_uuid
, uuid
, sizeof(BTRFS_UUID
)) == sizeof(BTRFS_UUID
)) {
2942 TRACE("returning device %llx\n", dev
->devitem
.dev_id
);
2956 ExAcquireResourceSharedLite(&pdode
->child_lock
, TRUE
);
2958 if (Vcb
->devices_loaded
< Vcb
->superblock
.num_devices
) {
2959 le
= pdode
->children
.Flink
;
2961 while (le
!= &pdode
->children
) {
2962 volume_child
* vc
= CONTAINING_RECORD(le
, volume_child
, list_entry
);
2964 if (RtlCompareMemory(uuid
, &vc
->uuid
, sizeof(BTRFS_UUID
)) == sizeof(BTRFS_UUID
)) {
2967 dev
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(device
), ALLOC_TAG
);
2969 ExReleaseResourceLite(&pdode
->child_lock
);
2970 ERR("out of memory\n");
2974 RtlZeroMemory(dev
, sizeof(device
));
2975 dev
->devobj
= vc
->devobj
;
2976 dev
->devitem
.device_uuid
= *uuid
;
2977 dev
->devitem
.dev_id
= vc
->devid
;
2978 dev
->devitem
.num_bytes
= vc
->size
;
2979 dev
->seeding
= vc
->seeding
;
2980 dev
->readonly
= dev
->seeding
;
2982 dev
->removable
= FALSE
;
2983 dev
->disk_num
= vc
->disk_num
;
2984 dev
->part_num
= vc
->part_num
;
2985 dev
->num_trim_entries
= 0;
2986 InitializeListHead(&dev
->trim_list
);
2988 add_device_to_list(Vcb
, dev
);
2989 Vcb
->devices_loaded
++;
2991 ExReleaseResourceLite(&pdode
->child_lock
);
3000 ExReleaseResourceLite(&pdode
->child_lock
);
3003 WARN("could not find device with uuid %02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n",
3004 uuid
->uuid
[0], uuid
->uuid
[1], uuid
->uuid
[2], uuid
->uuid
[3], uuid
->uuid
[4], uuid
->uuid
[5], uuid
->uuid
[6], uuid
->uuid
[7],
3005 uuid
->uuid
[8], uuid
->uuid
[9], uuid
->uuid
[10], uuid
->uuid
[11], uuid
->uuid
[12], uuid
->uuid
[13], uuid
->uuid
[14], uuid
->uuid
[15]);
3010 static BOOL
is_device_removable(_In_ PDEVICE_OBJECT devobj
) {
3012 STORAGE_HOTPLUG_INFO shi
;
3014 Status
= dev_ioctl(devobj
, IOCTL_STORAGE_GET_HOTPLUG_INFO
, NULL
, 0, &shi
, sizeof(STORAGE_HOTPLUG_INFO
), TRUE
, NULL
);
3016 if (!NT_SUCCESS(Status
)) {
3017 ERR("dev_ioctl returned %08x\n", Status
);
3021 return shi
.MediaRemovable
!= 0 ? TRUE
: FALSE
;
3024 static ULONG
get_device_change_count(_In_ PDEVICE_OBJECT devobj
) {
3027 IO_STATUS_BLOCK iosb
;
3029 Status
= dev_ioctl(devobj
, IOCTL_STORAGE_CHECK_VERIFY
, NULL
, 0, &cc
, sizeof(ULONG
), TRUE
, &iosb
);
3031 if (!NT_SUCCESS(Status
)) {
3032 ERR("dev_ioctl returned %08x\n", Status
);
3036 if (iosb
.Information
< sizeof(ULONG
)) {
3037 ERR("iosb.Information was too short\n");
3044 void init_device(_In_ device_extension
* Vcb
, _Inout_ device
* dev
, _In_ BOOL get_nums
) {
3047 ATA_PASS_THROUGH_EX
* apte
;
3048 STORAGE_PROPERTY_QUERY spq
;
3049 DEVICE_TRIM_DESCRIPTOR dtd
;
3051 dev
->removable
= is_device_removable(dev
->devobj
);
3052 dev
->change_count
= dev
->removable
? get_device_change_count(dev
->devobj
) : 0;
3055 STORAGE_DEVICE_NUMBER sdn
;
3057 Status
= dev_ioctl(dev
->devobj
, IOCTL_STORAGE_GET_DEVICE_NUMBER
, NULL
, 0,
3058 &sdn
, sizeof(STORAGE_DEVICE_NUMBER
), TRUE
, NULL
);
3060 if (!NT_SUCCESS(Status
)) {
3061 WARN("IOCTL_STORAGE_GET_DEVICE_NUMBER returned %08x\n", Status
);
3062 dev
->disk_num
= 0xffffffff;
3063 dev
->part_num
= 0xffffffff;
3065 dev
->disk_num
= sdn
.DeviceNumber
;
3066 dev
->part_num
= sdn
.PartitionNumber
;
3071 dev
->readonly
= dev
->seeding
;
3073 dev
->num_trim_entries
= 0;
3074 dev
->stats_changed
= FALSE
;
3075 InitializeListHead(&dev
->trim_list
);
3077 if (!dev
->readonly
) {
3078 Status
= dev_ioctl(dev
->devobj
, IOCTL_DISK_IS_WRITABLE
, NULL
, 0,
3079 NULL
, 0, TRUE
, NULL
);
3080 if (Status
== STATUS_MEDIA_WRITE_PROTECTED
)
3081 dev
->readonly
= TRUE
;
3084 aptelen
= sizeof(ATA_PASS_THROUGH_EX
) + 512;
3085 apte
= ExAllocatePoolWithTag(NonPagedPool
, aptelen
, ALLOC_TAG
);
3087 ERR("out of memory\n");
3091 RtlZeroMemory(apte
, aptelen
);
3093 apte
->Length
= sizeof(ATA_PASS_THROUGH_EX
);
3094 apte
->AtaFlags
= ATA_FLAGS_DATA_IN
;
3095 apte
->DataTransferLength
= aptelen
- sizeof(ATA_PASS_THROUGH_EX
);
3096 apte
->TimeOutValue
= 3;
3097 apte
->DataBufferOffset
= apte
->Length
;
3098 apte
->CurrentTaskFile
[6] = IDE_COMMAND_IDENTIFY
;
3100 Status
= dev_ioctl(dev
->devobj
, IOCTL_ATA_PASS_THROUGH
, apte
, aptelen
,
3101 apte
, aptelen
, TRUE
, NULL
);
3103 if (!NT_SUCCESS(Status
))
3104 TRACE("IOCTL_ATA_PASS_THROUGH returned %08x for IDENTIFY DEVICE\n", Status
);
3106 IDENTIFY_DEVICE_DATA
* idd
= (IDENTIFY_DEVICE_DATA
*)((UINT8
*)apte
+ sizeof(ATA_PASS_THROUGH_EX
));
3108 if (idd
->CommandSetSupport
.FlushCache
) {
3109 dev
->can_flush
= TRUE
;
3110 TRACE("FLUSH CACHE supported\n");
3112 TRACE("FLUSH CACHE not supported\n");
3117 spq
.PropertyId
= StorageDeviceTrimProperty
;
3118 spq
.QueryType
= PropertyStandardQuery
;
3119 spq
.AdditionalParameters
[0] = 0;
3121 Status
= dev_ioctl(dev
->devobj
, IOCTL_STORAGE_QUERY_PROPERTY
, &spq
, sizeof(STORAGE_PROPERTY_QUERY
),
3122 &dtd
, sizeof(DEVICE_TRIM_DESCRIPTOR
), TRUE
, NULL
);
3124 if (NT_SUCCESS(Status
)) {
3125 if (dtd
.TrimEnabled
) {
3128 TRACE("TRIM supported\n");
3130 TRACE("TRIM not supported\n");
3133 RtlZeroMemory(dev
->stats
, sizeof(UINT64
) * 5);
3136 static NTSTATUS
load_chunk_root(_In_
_Requires_lock_held_(_Curr_
->tree_lock
) device_extension
* Vcb
, _In_opt_ PIRP Irp
) {
3137 traverse_ptr tp
, next_tp
;
3143 searchkey
.obj_id
= 0;
3144 searchkey
.obj_type
= 0;
3145 searchkey
.offset
= 0;
3147 Vcb
->data_flags
= 0;
3148 Vcb
->metadata_flags
= 0;
3149 Vcb
->system_flags
= 0;
3151 Status
= find_item(Vcb
, Vcb
->chunk_root
, &tp
, &searchkey
, FALSE
, Irp
);
3152 if (!NT_SUCCESS(Status
)) {
3153 ERR("error - find_item returned %08x\n", Status
);
3158 TRACE("(%llx,%x,%llx)\n", tp
.item
->key
.obj_id
, tp
.item
->key
.obj_type
, tp
.item
->key
.offset
);
3160 if (tp
.item
->key
.obj_id
== 1 && tp
.item
->key
.obj_type
== TYPE_DEV_ITEM
) {
3161 if (tp
.item
->size
< sizeof(DEV_ITEM
)) {
3162 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
));
3164 DEV_ITEM
* di
= (DEV_ITEM
*)tp
.item
->data
;
3168 le
= Vcb
->devices
.Flink
;
3169 while (le
!= &Vcb
->devices
) {
3170 device
* dev
= CONTAINING_RECORD(le
, device
, list_entry
);
3172 if (dev
->devobj
&& RtlCompareMemory(&dev
->devitem
.device_uuid
, &di
->device_uuid
, sizeof(BTRFS_UUID
)) == sizeof(BTRFS_UUID
)) {
3173 RtlCopyMemory(&dev
->devitem
, tp
.item
->data
, min(tp
.item
->size
, sizeof(DEV_ITEM
)));
3175 if (le
!= Vcb
->devices
.Flink
)
3176 init_device(Vcb
, dev
, TRUE
);
3185 if (!done
&& Vcb
->vde
) {
3186 volume_device_extension
* vde
= Vcb
->vde
;
3187 pdo_device_extension
* pdode
= vde
->pdode
;
3189 ExAcquireResourceSharedLite(&pdode
->child_lock
, TRUE
);
3191 if (Vcb
->devices_loaded
< Vcb
->superblock
.num_devices
) {
3192 le
= pdode
->children
.Flink
;
3194 while (le
!= &pdode
->children
) {
3195 volume_child
* vc
= CONTAINING_RECORD(le
, volume_child
, list_entry
);
3197 if (RtlCompareMemory(&di
->device_uuid
, &vc
->uuid
, sizeof(BTRFS_UUID
)) == sizeof(BTRFS_UUID
)) {
3200 dev
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(device
), ALLOC_TAG
);
3202 ExReleaseResourceLite(&pdode
->child_lock
);
3203 ERR("out of memory\n");
3204 return STATUS_INSUFFICIENT_RESOURCES
;
3207 RtlZeroMemory(dev
, sizeof(device
));
3209 dev
->devobj
= vc
->devobj
;
3210 RtlCopyMemory(&dev
->devitem
, di
, min(tp
.item
->size
, sizeof(DEV_ITEM
)));
3211 dev
->seeding
= vc
->seeding
;
3212 init_device(Vcb
, dev
, FALSE
);
3214 if (dev
->devitem
.num_bytes
> vc
->size
) {
3215 WARN("device %llx: DEV_ITEM says %llx bytes, but Windows only reports %llx\n", tp
.item
->key
.offset
,
3216 dev
->devitem
.num_bytes
, vc
->size
);
3218 dev
->devitem
.num_bytes
= vc
->size
;
3221 dev
->disk_num
= vc
->disk_num
;
3222 dev
->part_num
= vc
->part_num
;
3223 add_device_to_list(Vcb
, dev
);
3224 Vcb
->devices_loaded
++;
3234 if (!Vcb
->options
.allow_degraded
) {
3235 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
,
3236 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],
3237 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]);
3241 dev
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(device
), ALLOC_TAG
);
3243 ExReleaseResourceLite(&pdode
->child_lock
);
3244 ERR("out of memory\n");
3245 return STATUS_INSUFFICIENT_RESOURCES
;
3248 RtlZeroMemory(dev
, sizeof(device
));
3250 // Missing device, so we keep dev->devobj as NULL
3251 RtlCopyMemory(&dev
->devitem
, di
, min(tp
.item
->size
, sizeof(DEV_ITEM
)));
3252 InitializeListHead(&dev
->trim_list
);
3254 add_device_to_list(Vcb
, dev
);
3255 Vcb
->devices_loaded
++;
3259 ERR("unexpected device %llx found\n", tp
.item
->key
.offset
);
3261 ExReleaseResourceLite(&pdode
->child_lock
);
3264 } else if (tp
.item
->key
.obj_type
== TYPE_CHUNK_ITEM
) {
3265 if (tp
.item
->size
< sizeof(CHUNK_ITEM
)) {
3266 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
));
3268 c
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(chunk
), ALLOC_TAG
);
3271 ERR("out of memory\n");
3272 return STATUS_INSUFFICIENT_RESOURCES
;
3275 c
->size
= tp
.item
->size
;
3276 c
->offset
= tp
.item
->key
.offset
;
3277 c
->used
= c
->oldused
= 0;
3278 c
->cache
= c
->old_cache
= NULL
;
3280 c
->readonly
= FALSE
;
3282 c
->cache_loaded
= FALSE
;
3284 c
->space_changed
= FALSE
;
3287 c
->chunk_item
= ExAllocatePoolWithTag(NonPagedPool
, tp
.item
->size
, ALLOC_TAG
);
3289 if (!c
->chunk_item
) {
3290 ERR("out of memory\n");
3292 return STATUS_INSUFFICIENT_RESOURCES
;
3295 RtlCopyMemory(c
->chunk_item
, tp
.item
->data
, tp
.item
->size
);
3297 if (c
->chunk_item
->type
& BLOCK_FLAG_DATA
&& c
->chunk_item
->type
> Vcb
->data_flags
)
3298 Vcb
->data_flags
= c
->chunk_item
->type
;
3300 if (c
->chunk_item
->type
& BLOCK_FLAG_METADATA
&& c
->chunk_item
->type
> Vcb
->metadata_flags
)
3301 Vcb
->metadata_flags
= c
->chunk_item
->type
;
3303 if (c
->chunk_item
->type
& BLOCK_FLAG_SYSTEM
&& c
->chunk_item
->type
> Vcb
->system_flags
)
3304 Vcb
->system_flags
= c
->chunk_item
->type
;
3306 if (c
->chunk_item
->type
& BLOCK_FLAG_RAID10
) {
3307 if (c
->chunk_item
->sub_stripes
== 0 || c
->chunk_item
->sub_stripes
> c
->chunk_item
->num_stripes
) {
3308 ERR("chunk %llx: invalid stripes (num_stripes %u, sub_stripes %u)\n", c
->offset
, c
->chunk_item
->num_stripes
, c
->chunk_item
->sub_stripes
);
3309 ExFreePool(c
->chunk_item
);
3311 return STATUS_INTERNAL_ERROR
;
3315 if (c
->chunk_item
->num_stripes
> 0) {
3316 CHUNK_ITEM_STRIPE
* cis
= (CHUNK_ITEM_STRIPE
*)&c
->chunk_item
[1];
3319 c
->devices
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(device
*) * c
->chunk_item
->num_stripes
, ALLOC_TAG
);
3322 ERR("out of memory\n");
3323 ExFreePool(c
->chunk_item
);
3325 return STATUS_INSUFFICIENT_RESOURCES
;
3328 for (i
= 0; i
< c
->chunk_item
->num_stripes
; i
++) {
3329 c
->devices
[i
] = find_device_from_uuid(Vcb
, &cis
[i
].dev_uuid
);
3330 TRACE("device %llu = %p\n", i
, c
->devices
[i
]);
3332 if (!c
->devices
[i
]) {
3333 ERR("missing device\n");
3334 ExFreePool(c
->chunk_item
);
3336 return STATUS_INTERNAL_ERROR
;
3339 if (c
->devices
[i
]->readonly
)
3343 ERR("chunk %llx: number of stripes is 0\n", c
->offset
);
3344 ExFreePool(c
->chunk_item
);
3346 return STATUS_INTERNAL_ERROR
;
3349 ExInitializeResourceLite(&c
->lock
);
3350 ExInitializeResourceLite(&c
->changed_extents_lock
);
3352 InitializeListHead(&c
->space
);
3353 InitializeListHead(&c
->space_size
);
3354 InitializeListHead(&c
->deleting
);
3355 InitializeListHead(&c
->changed_extents
);
3357 InitializeListHead(&c
->range_locks
);
3358 ExInitializeResourceLite(&c
->range_locks_lock
);
3359 KeInitializeEvent(&c
->range_locks_event
, NotificationEvent
, FALSE
);
3361 InitializeListHead(&c
->partial_stripes
);
3362 ExInitializeResourceLite(&c
->partial_stripes_lock
);
3364 c
->last_alloc_set
= FALSE
;
3368 InsertTailList(&Vcb
->chunks
, &c
->list_entry
);
3370 c
->list_entry_balance
.Flink
= NULL
;
3374 b
= find_next_item(Vcb
, &tp
, &next_tp
, FALSE
, Irp
);
3380 Vcb
->log_to_phys_loaded
= TRUE
;
3382 if (Vcb
->data_flags
== 0)
3383 Vcb
->data_flags
= BLOCK_FLAG_DATA
| (Vcb
->superblock
.num_devices
> 1 ? BLOCK_FLAG_RAID0
: 0);
3385 if (Vcb
->metadata_flags
== 0)
3386 Vcb
->metadata_flags
= BLOCK_FLAG_METADATA
| (Vcb
->superblock
.num_devices
> 1 ? BLOCK_FLAG_RAID1
: BLOCK_FLAG_DUPLICATE
);
3388 if (Vcb
->system_flags
== 0)
3389 Vcb
->system_flags
= BLOCK_FLAG_SYSTEM
| (Vcb
->superblock
.num_devices
> 1 ? BLOCK_FLAG_RAID1
: BLOCK_FLAG_DUPLICATE
);
3391 if (Vcb
->superblock
.incompat_flags
& BTRFS_INCOMPAT_FLAGS_MIXED_GROUPS
) {
3392 Vcb
->metadata_flags
|= BLOCK_FLAG_DATA
;
3393 Vcb
->data_flags
= Vcb
->metadata_flags
;
3396 return STATUS_SUCCESS
;
3399 void protect_superblocks(_Inout_ chunk
* c
) {
3401 UINT64 off_start
, off_end
;
3403 // The Linux driver also protects all the space before the first superblock.
3404 // I realize this confuses physical and logical addresses, but this is what btrfs-progs does -
3405 // evidently Linux assumes the chunk at 0 is always SINGLE.
3406 if (c
->offset
< superblock_addrs
[0])
3407 space_list_subtract(c
, FALSE
, c
->offset
, superblock_addrs
[0] - c
->offset
, NULL
);
3409 while (superblock_addrs
[i
] != 0) {
3410 CHUNK_ITEM
* ci
= c
->chunk_item
;
3411 CHUNK_ITEM_STRIPE
* cis
= (CHUNK_ITEM_STRIPE
*)&ci
[1];
3413 if (ci
->type
& BLOCK_FLAG_RAID0
|| ci
->type
& BLOCK_FLAG_RAID10
) {
3414 for (j
= 0; j
< ci
->num_stripes
; j
++) {
3415 UINT16 sub_stripes
= max(ci
->sub_stripes
, 1);
3417 if (cis
[j
].offset
+ (ci
->size
* ci
->num_stripes
/ sub_stripes
) > superblock_addrs
[i
] && cis
[j
].offset
<= superblock_addrs
[i
] + sizeof(superblock
)) {
3420 UINT16 startoffstripe
;
3423 TRACE("cut out superblock in chunk %llx\n", c
->offset
);
3425 off_start
= superblock_addrs
[i
] - cis
[j
].offset
;
3426 off_start
-= off_start
% ci
->stripe_length
;
3427 off_start
*= ci
->num_stripes
/ sub_stripes
;
3428 off_start
+= (j
/ sub_stripes
) * ci
->stripe_length
;
3430 off_end
= off_start
+ ci
->stripe_length
;
3433 get_raid0_offset(off_start
, ci
->stripe_length
, ci
->num_stripes
/ sub_stripes
, &startoff
, &startoffstripe
);
3434 TRACE("j = %u, startoffstripe = %u\n", j
, startoffstripe
);
3435 TRACE("startoff = %llx, superblock = %llx\n", startoff
+ cis
[j
].offset
, superblock_addrs
[i
]);
3438 space_list_subtract(c
, FALSE
, c
->offset
+ off_start
, off_end
- off_start
, NULL
);
3441 } else if (ci
->type
& BLOCK_FLAG_RAID5
) {
3442 UINT64 stripe_size
= ci
->size
/ (ci
->num_stripes
- 1);
3444 for (j
= 0; j
< ci
->num_stripes
; j
++) {
3445 if (cis
[j
].offset
+ stripe_size
> superblock_addrs
[i
] && cis
[j
].offset
<= superblock_addrs
[i
] + sizeof(superblock
)) {
3446 TRACE("cut out superblock in chunk %llx\n", c
->offset
);
3448 off_start
= superblock_addrs
[i
] - cis
[j
].offset
;
3449 off_start
-= off_start
% ci
->stripe_length
;
3450 off_start
*= ci
->num_stripes
- 1;
3452 off_end
= sector_align(superblock_addrs
[i
] - cis
[j
].offset
+ sizeof(superblock
), ci
->stripe_length
);
3453 off_end
*= ci
->num_stripes
- 1;
3455 TRACE("cutting out %llx, size %llx\n", c
->offset
+ off_start
, off_end
- off_start
);
3457 space_list_subtract(c
, FALSE
, c
->offset
+ off_start
, off_end
- off_start
, NULL
);
3460 } else if (ci
->type
& BLOCK_FLAG_RAID6
) {
3461 UINT64 stripe_size
= ci
->size
/ (ci
->num_stripes
- 2);
3463 for (j
= 0; j
< ci
->num_stripes
; j
++) {
3464 if (cis
[j
].offset
+ stripe_size
> superblock_addrs
[i
] && cis
[j
].offset
<= superblock_addrs
[i
] + sizeof(superblock
)) {
3465 TRACE("cut out superblock in chunk %llx\n", c
->offset
);
3467 off_start
= superblock_addrs
[i
] - cis
[j
].offset
;
3468 off_start
-= off_start
% ci
->stripe_length
;
3469 off_start
*= ci
->num_stripes
- 2;
3471 off_end
= sector_align(superblock_addrs
[i
] - cis
[j
].offset
+ sizeof(superblock
), ci
->stripe_length
);
3472 off_end
*= ci
->num_stripes
- 2;
3474 TRACE("cutting out %llx, size %llx\n", c
->offset
+ off_start
, off_end
- off_start
);
3476 space_list_subtract(c
, FALSE
, c
->offset
+ off_start
, off_end
- off_start
, NULL
);
3479 } else { // SINGLE, DUPLICATE, RAID1
3480 for (j
= 0; j
< ci
->num_stripes
; j
++) {
3481 if (cis
[j
].offset
+ ci
->size
> superblock_addrs
[i
] && cis
[j
].offset
<= superblock_addrs
[i
] + sizeof(superblock
)) {
3482 TRACE("cut out superblock in chunk %llx\n", c
->offset
);
3484 // The Linux driver protects the whole stripe in which the superblock lives
3486 off_start
= ((superblock_addrs
[i
] - cis
[j
].offset
) / c
->chunk_item
->stripe_length
) * c
->chunk_item
->stripe_length
;
3487 off_end
= sector_align(superblock_addrs
[i
] - cis
[j
].offset
+ sizeof(superblock
), c
->chunk_item
->stripe_length
);
3489 space_list_subtract(c
, FALSE
, c
->offset
+ off_start
, off_end
- off_start
, NULL
);
3498 NTSTATUS
find_chunk_usage(_In_
_Requires_lock_held_(_Curr_
->tree_lock
) device_extension
* Vcb
, _In_opt_ PIRP Irp
) {
3499 LIST_ENTRY
* le
= Vcb
->chunks
.Flink
;
3503 BLOCK_GROUP_ITEM
* bgi
;
3506 searchkey
.obj_type
= TYPE_BLOCK_GROUP_ITEM
;
3508 while (le
!= &Vcb
->chunks
) {
3509 c
= CONTAINING_RECORD(le
, chunk
, list_entry
);
3511 searchkey
.obj_id
= c
->offset
;
3512 searchkey
.offset
= c
->chunk_item
->size
;
3514 Status
= find_item(Vcb
, Vcb
->extent_root
, &tp
, &searchkey
, FALSE
, Irp
);
3515 if (!NT_SUCCESS(Status
)) {
3516 ERR("error - find_item returned %08x\n", Status
);
3520 if (!keycmp(searchkey
, tp
.item
->key
)) {
3521 if (tp
.item
->size
>= sizeof(BLOCK_GROUP_ITEM
)) {
3522 bgi
= (BLOCK_GROUP_ITEM
*)tp
.item
->data
;
3524 c
->used
= c
->oldused
= bgi
->used
;
3526 TRACE("chunk %llx has %llx bytes used\n", c
->offset
, c
->used
);
3528 ERR("(%llx;%llx,%x,%llx) is %u bytes, expected %u\n",
3529 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
));
3536 Vcb
->chunk_usage_found
= TRUE
;
3538 return STATUS_SUCCESS
;
3541 static NTSTATUS
load_sys_chunks(_In_ device_extension
* Vcb
) {
3543 ULONG n
= Vcb
->superblock
.n
;
3546 if (n
> sizeof(KEY
)) {
3547 RtlCopyMemory(&key
, &Vcb
->superblock
.sys_chunk_array
[Vcb
->superblock
.n
- n
], sizeof(KEY
));
3550 return STATUS_SUCCESS
;
3552 TRACE("bootstrap: %llx,%x,%llx\n", key
.obj_id
, key
.obj_type
, key
.offset
);
3554 if (key
.obj_type
== TYPE_CHUNK_ITEM
) {
3559 if (n
< sizeof(CHUNK_ITEM
))
3560 return STATUS_SUCCESS
;
3562 ci
= (CHUNK_ITEM
*)&Vcb
->superblock
.sys_chunk_array
[Vcb
->superblock
.n
- n
];
3563 cisize
= sizeof(CHUNK_ITEM
) + (ci
->num_stripes
* sizeof(CHUNK_ITEM_STRIPE
));
3566 return STATUS_SUCCESS
;
3568 sc
= ExAllocatePoolWithTag(PagedPool
, sizeof(sys_chunk
), ALLOC_TAG
);
3571 ERR("out of memory\n");
3572 return STATUS_INSUFFICIENT_RESOURCES
;
3577 sc
->data
= ExAllocatePoolWithTag(PagedPool
, sc
->size
, ALLOC_TAG
);
3580 ERR("out of memory\n");
3582 return STATUS_INSUFFICIENT_RESOURCES
;
3585 RtlCopyMemory(sc
->data
, ci
, sc
->size
);
3586 InsertTailList(&Vcb
->sys_chunks
, &sc
->list_entry
);
3590 ERR("unexpected item %llx,%x,%llx in bootstrap\n", key
.obj_id
, key
.obj_type
, key
.offset
);
3591 return STATUS_INTERNAL_ERROR
;
3595 return STATUS_SUCCESS
;
3599 static root
* find_default_subvol(_In_
_Requires_lock_held_(_Curr_
->tree_lock
) device_extension
* Vcb
, _In_opt_ PIRP Irp
) {
3602 static char fn
[] = "default";
3603 static UINT32 crc32
= 0x8dbfc2d2;
3605 if (Vcb
->options
.subvol_id
!= 0) {
3606 le
= Vcb
->roots
.Flink
;
3607 while (le
!= &Vcb
->roots
) {
3608 root
* r
= CONTAINING_RECORD(le
, root
, list_entry
);
3610 if (r
->id
== Vcb
->options
.subvol_id
)
3617 if (Vcb
->superblock
.incompat_flags
& BTRFS_INCOMPAT_FLAGS_DEFAULT_SUBVOL
) {
3623 searchkey
.obj_id
= Vcb
->superblock
.root_dir_objectid
;
3624 searchkey
.obj_type
= TYPE_DIR_ITEM
;
3625 searchkey
.offset
= crc32
;
3627 Status
= find_item(Vcb
, Vcb
->root_root
, &tp
, &searchkey
, FALSE
, Irp
);
3628 if (!NT_SUCCESS(Status
)) {
3629 ERR("error - find_item returned %08x\n", Status
);
3633 if (keycmp(tp
.item
->key
, searchkey
)) {
3634 ERR("could not find (%llx,%x,%llx) in root tree\n", searchkey
.obj_id
, searchkey
.obj_type
, searchkey
.offset
);
3638 if (tp
.item
->size
< sizeof(DIR_ITEM
)) {
3639 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
));
3643 di
= (DIR_ITEM
*)tp
.item
->data
;
3645 if (tp
.item
->size
< sizeof(DIR_ITEM
) - 1 + di
->n
) {
3646 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
);
3650 if (di
->n
!= strlen(fn
) || RtlCompareMemory(di
->name
, fn
, di
->n
) != di
->n
) {
3651 ERR("root DIR_ITEM had same CRC32, but was not \"default\"\n");
3655 if (di
->key
.obj_type
!= TYPE_ROOT_ITEM
) {
3656 ERR("default root has key (%llx,%x,%llx), expected subvolume\n", di
->key
.obj_id
, di
->key
.obj_type
, di
->key
.offset
);
3660 le
= Vcb
->roots
.Flink
;
3661 while (le
!= &Vcb
->roots
) {
3662 root
* r
= CONTAINING_RECORD(le
, root
, list_entry
);
3664 if (r
->id
== di
->key
.obj_id
)
3670 ERR("could not find root %llx, using default instead\n", di
->key
.obj_id
);
3674 le
= Vcb
->roots
.Flink
;
3675 while (le
!= &Vcb
->roots
) {
3676 root
* r
= CONTAINING_RECORD(le
, root
, list_entry
);
3678 if (r
->id
== BTRFS_ROOT_FSTREE
)
3687 void init_file_cache(_In_ PFILE_OBJECT FileObject
, _In_ CC_FILE_SIZES
* ccfs
) {
3688 TRACE("(%p, %p)\n", FileObject
, ccfs
);
3690 CcInitializeCacheMap(FileObject
, ccfs
, FALSE
, cache_callbacks
, FileObject
);
3693 fCcSetAdditionalCacheAttributesEx(FileObject
, CC_ENABLE_DISK_IO_ACCOUNTING
);
3695 CcSetReadAheadGranularity(FileObject
, READ_AHEAD_GRANULARITY
);
3698 static NTSTATUS
create_calc_threads(_In_ PDEVICE_OBJECT DeviceObject
) {
3699 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
3702 Vcb
->calcthreads
.num_threads
= KeQueryActiveProcessorCount(NULL
);
3704 Vcb
->calcthreads
.threads
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(drv_calc_thread
) * Vcb
->calcthreads
.num_threads
, ALLOC_TAG
);
3705 if (!Vcb
->calcthreads
.threads
) {
3706 ERR("out of memory\n");
3707 return STATUS_INSUFFICIENT_RESOURCES
;
3710 InitializeListHead(&Vcb
->calcthreads
.job_list
);
3711 ExInitializeResourceLite(&Vcb
->calcthreads
.lock
);
3712 KeInitializeEvent(&Vcb
->calcthreads
.event
, NotificationEvent
, FALSE
);
3714 RtlZeroMemory(Vcb
->calcthreads
.threads
, sizeof(drv_calc_thread
) * Vcb
->calcthreads
.num_threads
);
3716 for (i
= 0; i
< Vcb
->calcthreads
.num_threads
; i
++) {
3719 Vcb
->calcthreads
.threads
[i
].DeviceObject
= DeviceObject
;
3720 KeInitializeEvent(&Vcb
->calcthreads
.threads
[i
].finished
, NotificationEvent
, FALSE
);
3722 Status
= PsCreateSystemThread(&Vcb
->calcthreads
.threads
[i
].handle
, 0, NULL
, NULL
, NULL
, calc_thread
, &Vcb
->calcthreads
.threads
[i
]);
3723 if (!NT_SUCCESS(Status
)) {
3726 ERR("PsCreateSystemThread returned %08x\n", Status
);
3728 for (j
= 0; j
< i
; j
++) {
3729 Vcb
->calcthreads
.threads
[i
].quit
= TRUE
;
3732 KeSetEvent(&Vcb
->calcthreads
.event
, 0, FALSE
);
3738 return STATUS_SUCCESS
;
3741 static BOOL
is_btrfs_volume(_In_ PDEVICE_OBJECT DeviceObject
) {
3743 MOUNTDEV_NAME mdn
, *mdn2
;
3746 Status
= dev_ioctl(DeviceObject
, IOCTL_MOUNTDEV_QUERY_DEVICE_NAME
, NULL
, 0, &mdn
, sizeof(MOUNTDEV_NAME
), TRUE
, NULL
);
3747 if (!NT_SUCCESS(Status
) && Status
!= STATUS_BUFFER_OVERFLOW
) {
3748 ERR("IOCTL_MOUNTDEV_QUERY_DEVICE_NAME returned %08x\n", Status
);
3752 mdnsize
= (ULONG
)offsetof(MOUNTDEV_NAME
, Name
[0]) + mdn
.NameLength
;
3754 mdn2
= ExAllocatePoolWithTag(PagedPool
, mdnsize
, ALLOC_TAG
);
3756 ERR("out of memory\n");
3760 Status
= dev_ioctl(DeviceObject
, IOCTL_MOUNTDEV_QUERY_DEVICE_NAME
, NULL
, 0, mdn2
, mdnsize
, TRUE
, NULL
);
3761 if (!NT_SUCCESS(Status
)) {
3762 ERR("IOCTL_MOUNTDEV_QUERY_DEVICE_NAME returned %08x\n", Status
);
3767 if (mdn2
->NameLength
> wcslen(BTRFS_VOLUME_PREFIX
) * sizeof(WCHAR
) &&
3768 RtlCompareMemory(mdn2
->Name
, BTRFS_VOLUME_PREFIX
, wcslen(BTRFS_VOLUME_PREFIX
) * sizeof(WCHAR
)) == wcslen(BTRFS_VOLUME_PREFIX
) * sizeof(WCHAR
)) {
3778 static NTSTATUS
get_device_pnp_name_guid(_In_ PDEVICE_OBJECT DeviceObject
, _Out_ PUNICODE_STRING pnp_name
, _In_
const GUID
* guid
) {
3780 WCHAR
*list
= NULL
, *s
;
3782 Status
= IoGetDeviceInterfaces((PVOID
)guid
, NULL
, 0, &list
);
3783 if (!NT_SUCCESS(Status
)) {
3784 ERR("IoGetDeviceInterfaces returned %08x\n", Status
);
3790 PFILE_OBJECT FileObject
;
3791 PDEVICE_OBJECT devobj
;
3792 UNICODE_STRING name
;
3794 name
.Length
= name
.MaximumLength
= (USHORT
)wcslen(s
) * sizeof(WCHAR
);
3797 if (NT_SUCCESS(IoGetDeviceObjectPointer(&name
, FILE_READ_ATTRIBUTES
, &FileObject
, &devobj
))) {
3798 if (DeviceObject
== devobj
|| DeviceObject
== FileObject
->DeviceObject
) {
3799 ObDereferenceObject(FileObject
);
3801 pnp_name
->Buffer
= ExAllocatePoolWithTag(PagedPool
, name
.Length
, ALLOC_TAG
);
3802 if (!pnp_name
->Buffer
) {
3803 ERR("out of memory\n");
3804 Status
= STATUS_INSUFFICIENT_RESOURCES
;
3808 RtlCopyMemory(pnp_name
->Buffer
, name
.Buffer
, name
.Length
);
3809 pnp_name
->Length
= pnp_name
->MaximumLength
= name
.Length
;
3811 Status
= STATUS_SUCCESS
;
3815 ObDereferenceObject(FileObject
);
3818 s
= &s
[wcslen(s
) + 1];
3821 pnp_name
->Length
= pnp_name
->MaximumLength
= 0;
3822 pnp_name
->Buffer
= 0;
3824 Status
= STATUS_NOT_FOUND
;
3833 NTSTATUS
get_device_pnp_name(_In_ PDEVICE_OBJECT DeviceObject
, _Out_ PUNICODE_STRING pnp_name
, _Out_
const GUID
** guid
) {
3836 Status
= get_device_pnp_name_guid(DeviceObject
, pnp_name
, &GUID_DEVINTERFACE_VOLUME
);
3837 if (NT_SUCCESS(Status
)) {
3838 *guid
= &GUID_DEVINTERFACE_VOLUME
;
3842 Status
= get_device_pnp_name_guid(DeviceObject
, pnp_name
, &GUID_DEVINTERFACE_HIDDEN_VOLUME
);
3843 if (NT_SUCCESS(Status
)) {
3844 *guid
= &GUID_DEVINTERFACE_HIDDEN_VOLUME
;
3848 Status
= get_device_pnp_name_guid(DeviceObject
, pnp_name
, &GUID_DEVINTERFACE_DISK
);
3849 if (NT_SUCCESS(Status
)) {
3850 *guid
= &GUID_DEVINTERFACE_DISK
;
3854 return STATUS_NOT_FOUND
;
3857 _Success_(return>=0)
3858 static NTSTATUS
check_mount_device(_In_ PDEVICE_OBJECT DeviceObject
, _Out_ BOOL
* no_pnp
) {
3863 UNICODE_STRING pnp_name
;
3866 to_read
= DeviceObject
->SectorSize
== 0 ? sizeof(superblock
) : (ULONG
)sector_align(sizeof(superblock
), DeviceObject
->SectorSize
);
3868 sb
= ExAllocatePoolWithTag(NonPagedPool
, to_read
, ALLOC_TAG
);
3870 ERR("out of memory\n");
3871 return STATUS_INSUFFICIENT_RESOURCES
;
3874 Status
= sync_read_phys(DeviceObject
, superblock_addrs
[0], to_read
, (PUCHAR
)sb
, TRUE
);
3875 if (!NT_SUCCESS(Status
)) {
3876 ERR("sync_read_phys returned %08x\n", Status
);
3880 if (sb
->magic
!= BTRFS_MAGIC
) {
3881 Status
= STATUS_SUCCESS
;
3885 crc32
= ~calc_crc32c(0xffffffff, (UINT8
*)&sb
->uuid
, (ULONG
)sizeof(superblock
) - sizeof(sb
->checksum
));
3887 if (crc32
!= *((UINT32
*)sb
->checksum
)) {
3888 WARN("crc32 was %08x, expected %08x\n", crc32
, *((UINT32
*)sb
->checksum
));
3889 Status
= STATUS_SUCCESS
;
3893 DeviceObject
->Flags
&= ~DO_VERIFY_VOLUME
;
3895 pnp_name
.Buffer
= NULL
;
3897 Status
= get_device_pnp_name(DeviceObject
, &pnp_name
, &guid
);
3898 if (!NT_SUCCESS(Status
)) {
3899 WARN("get_device_pnp_name returned %08x\n", Status
);
3900 pnp_name
.Length
= 0;
3903 if (pnp_name
.Length
== 0)
3907 volume_arrival(drvobj
, &pnp_name
);
3910 if (pnp_name
.Buffer
)
3911 ExFreePool(pnp_name
.Buffer
);
3913 Status
= STATUS_SUCCESS
;
3921 static BOOL
still_has_superblock(_In_ PDEVICE_OBJECT device
) {
3925 PDEVICE_OBJECT device2
;
3930 to_read
= device
->SectorSize
== 0 ? sizeof(superblock
) : (ULONG
)sector_align(sizeof(superblock
), device
->SectorSize
);
3932 sb
= ExAllocatePoolWithTag(NonPagedPool
, to_read
, ALLOC_TAG
);
3934 ERR("out of memory\n");
3938 Status
= sync_read_phys(device
, superblock_addrs
[0], to_read
, (PUCHAR
)sb
, TRUE
);
3939 if (!NT_SUCCESS(Status
)) {
3940 ERR("Failed to read superblock: %08x\n", Status
);
3945 if (sb
->magic
!= BTRFS_MAGIC
) {
3946 TRACE("not a BTRFS volume\n");
3950 UINT32 crc32
= ~calc_crc32c(0xffffffff, (UINT8
*)&sb
->uuid
, (ULONG
)sizeof(superblock
) - sizeof(sb
->checksum
));
3952 if (crc32
!= *((UINT32
*)sb
->checksum
)) {
3953 WARN("crc32 was %08x, expected %08x\n", crc32
, *((UINT32
*)sb
->checksum
));
3962 device2
->Flags
&= ~DO_VERIFY_VOLUME
;
3963 device2
= IoGetLowerDeviceObject(device2
);
3970 static NTSTATUS
mount_vol(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
3971 PIO_STACK_LOCATION IrpSp
;
3972 PDEVICE_OBJECT NewDeviceObject
= NULL
;
3973 PDEVICE_OBJECT DeviceToMount
, readobj
;
3975 device_extension
* Vcb
= NULL
;
3976 LIST_ENTRY
*le
, batchlist
;
3979 fcb
* root_fcb
= NULL
;
3980 ccb
* root_ccb
= NULL
;
3981 BOOL init_lookaside
= FALSE
;
3983 volume_device_extension
* vde
= NULL
;
3984 pdo_device_extension
* pdode
= NULL
;
3986 BOOL no_pnp
= FALSE
;
3989 TRACE("(%p, %p)\n", DeviceObject
, Irp
);
3991 if (DeviceObject
!= master_devobj
) {
3992 Status
= STATUS_INVALID_DEVICE_REQUEST
;
3996 IrpSp
= IoGetCurrentIrpStackLocation(Irp
);
3997 DeviceToMount
= IrpSp
->Parameters
.MountVolume
.DeviceObject
;
3999 if (!is_btrfs_volume(DeviceToMount
)) {
4000 Status
= check_mount_device(DeviceToMount
, &no_pnp
);
4001 if (!NT_SUCCESS(Status
))
4002 WARN("check_mount_device returned %08x\n", Status
);
4005 Status
= STATUS_UNRECOGNIZED_VOLUME
;
4011 pdo
= DeviceToMount
;
4013 while (IoGetLowerDeviceObject(pdo
)) {
4014 pdo
= IoGetLowerDeviceObject(pdo
);
4017 ExAcquireResourceSharedLite(&pdo_list_lock
, TRUE
);
4019 le
= pdo_list
.Flink
;
4020 while (le
!= &pdo_list
) {
4021 pdo_device_extension
* pdode
= CONTAINING_RECORD(le
, pdo_device_extension
, list_entry
);
4023 if (pdode
->pdo
== pdo
) {
4031 ExReleaseResourceLite(&pdo_list_lock
);
4033 if (!vde
|| vde
->type
!= VCB_TYPE_VOLUME
) {
4035 Status
= STATUS_UNRECOGNIZED_VOLUME
;
4043 ExAcquireResourceExclusiveLite(&pdode
->child_lock
, TRUE
);
4045 le
= pdode
->children
.Flink
;
4046 while (le
!= &pdode
->children
) {
4047 LIST_ENTRY
* le2
= le
->Flink
;
4049 vc
= CONTAINING_RECORD(pdode
->children
.Flink
, volume_child
, list_entry
);
4051 if (!still_has_superblock(vc
->devobj
)) {
4052 remove_volume_child(vde
, vc
, FALSE
);
4054 if (pdode
->num_children
== 0) {
4055 ERR("error - number of devices is zero\n");
4056 Status
= STATUS_INTERNAL_ERROR
;
4060 Status
= STATUS_DEVICE_NOT_READY
;
4067 if (pdode
->num_children
== 0 || pdode
->children_loaded
== 0) {
4068 ERR("error - number of devices is zero\n");
4069 Status
= STATUS_INTERNAL_ERROR
;
4073 ExConvertExclusiveToSharedLite(&pdode
->child_lock
);
4075 vc
= CONTAINING_RECORD(pdode
->children
.Flink
, volume_child
, list_entry
);
4077 readobj
= vc
->devobj
;
4078 readobjsize
= vc
->size
;
4080 vde
->device
->Characteristics
&= ~FILE_DEVICE_SECURE_OPEN
;
4082 GET_LENGTH_INFORMATION gli
;
4085 readobj
= DeviceToMount
;
4087 Status
= dev_ioctl(readobj
, IOCTL_DISK_GET_LENGTH_INFO
, NULL
, 0,
4088 &gli
, sizeof(gli
), TRUE
, NULL
);
4090 if (!NT_SUCCESS(Status
)) {
4091 ERR("error reading length information: %08x\n", Status
);
4095 readobjsize
= gli
.Length
.QuadPart
;
4098 Status
= IoCreateDevice(drvobj
, sizeof(device_extension
), NULL
, FILE_DEVICE_DISK_FILE_SYSTEM
, 0, FALSE
, &NewDeviceObject
);
4099 if (!NT_SUCCESS(Status
)) {
4100 ERR("IoCreateDevice returned %08x\n", Status
);
4101 Status
= STATUS_UNRECOGNIZED_VOLUME
;
4105 NewDeviceObject
->Flags
|= DO_DIRECT_IO
;
4107 // Some programs seem to expect that the sector size will be 512, for
4108 // FILE_NO_INTERMEDIATE_BUFFERING and the like.
4109 NewDeviceObject
->SectorSize
= min(DeviceToMount
->SectorSize
, 512);
4111 Vcb
= (PVOID
)NewDeviceObject
->DeviceExtension
;
4112 RtlZeroMemory(Vcb
, sizeof(device_extension
));
4113 Vcb
->type
= VCB_TYPE_FS
;
4116 ExInitializeResourceLite(&Vcb
->tree_lock
);
4117 Vcb
->need_write
= FALSE
;
4119 ExInitializeResourceLite(&Vcb
->fcb_lock
);
4120 ExInitializeResourceLite(&Vcb
->chunk_lock
);
4121 ExInitializeResourceLite(&Vcb
->dirty_fcbs_lock
);
4122 ExInitializeResourceLite(&Vcb
->dirty_filerefs_lock
);
4123 ExInitializeResourceLite(&Vcb
->dirty_subvols_lock
);
4124 ExInitializeResourceLite(&Vcb
->scrub
.stats_lock
);
4126 ExInitializeResourceLite(&Vcb
->load_lock
);
4127 ExAcquireResourceExclusiveLite(&Vcb
->load_lock
, TRUE
);
4129 ExAcquireResourceExclusiveLite(&Vcb
->tree_lock
, TRUE
);
4131 DeviceToMount
->Flags
|= DO_DIRECT_IO
;
4133 Status
= read_superblock(Vcb
, readobj
, readobjsize
);
4134 if (!NT_SUCCESS(Status
)) {
4135 if (!IoIsErrorUserInduced(Status
))
4136 Status
= STATUS_UNRECOGNIZED_VOLUME
;
4137 else if (Irp
->Tail
.Overlay
.Thread
)
4138 IoSetHardErrorOrVerifyDevice(Irp
, readobj
);
4143 if (!vde
&& Vcb
->superblock
.num_devices
> 1) {
4144 ERR("cannot mount multi-device FS with non-PNP device\n");
4145 Status
= STATUS_UNRECOGNIZED_VOLUME
;
4149 Status
= registry_load_volume_options(Vcb
);
4150 if (!NT_SUCCESS(Status
)) {
4151 ERR("registry_load_volume_options returned %08x\n", Status
);
4155 if (pdode
&& pdode
->children_loaded
< pdode
->num_children
&& (!Vcb
->options
.allow_degraded
|| !finished_probing
|| degraded_wait
)) {
4156 ERR("could not mount as %u device(s) missing\n", pdode
->num_children
- pdode
->children_loaded
);
4157 Status
= STATUS_DEVICE_NOT_READY
;
4161 if (Vcb
->options
.ignore
) {
4162 TRACE("ignoring volume\n");
4163 Status
= STATUS_UNRECOGNIZED_VOLUME
;
4167 if (Vcb
->superblock
.incompat_flags
& ~INCOMPAT_SUPPORTED
) {
4168 WARN("cannot mount because of unsupported incompat flags (%llx)\n", Vcb
->superblock
.incompat_flags
& ~INCOMPAT_SUPPORTED
);
4169 Status
= STATUS_UNRECOGNIZED_VOLUME
;
4173 Vcb
->readonly
= FALSE
;
4174 if (Vcb
->superblock
.compat_ro_flags
& ~COMPAT_RO_SUPPORTED
) {
4175 WARN("mounting read-only because of unsupported flags (%llx)\n", Vcb
->superblock
.compat_ro_flags
& ~COMPAT_RO_SUPPORTED
);
4176 Vcb
->readonly
= TRUE
;
4179 if (Vcb
->options
.readonly
)
4180 Vcb
->readonly
= TRUE
;
4182 Vcb
->superblock
.generation
++;
4183 Vcb
->superblock
.incompat_flags
|= BTRFS_INCOMPAT_FLAGS_MIXED_BACKREF
;
4185 InitializeListHead(&Vcb
->devices
);
4186 dev
= ExAllocatePoolWithTag(NonPagedPool
, sizeof(device
), ALLOC_TAG
);
4188 ERR("out of memory\n");
4189 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4193 dev
->devobj
= readobj
;
4194 RtlCopyMemory(&dev
->devitem
, &Vcb
->superblock
.dev_item
, sizeof(DEV_ITEM
));
4196 if (dev
->devitem
.num_bytes
> readobjsize
) {
4197 WARN("device %llx: DEV_ITEM says %llx bytes, but Windows only reports %llx\n", dev
->devitem
.dev_id
,
4198 dev
->devitem
.num_bytes
, readobjsize
);
4200 dev
->devitem
.num_bytes
= readobjsize
;
4203 dev
->seeding
= Vcb
->superblock
.flags
& BTRFS_SUPERBLOCK_FLAGS_SEEDING
? TRUE
: FALSE
;
4205 init_device(Vcb
, dev
, TRUE
);
4207 InsertTailList(&Vcb
->devices
, &dev
->list_entry
);
4208 Vcb
->devices_loaded
= 1;
4210 if (DeviceToMount
->Flags
& DO_SYSTEM_BOOT_PARTITION
)
4211 Vcb
->disallow_dismount
= TRUE
;
4213 TRACE("DeviceToMount = %p\n", DeviceToMount
);
4214 TRACE("IrpSp->Parameters.MountVolume.Vpb = %p\n", IrpSp
->Parameters
.MountVolume
.Vpb
);
4216 NewDeviceObject
->StackSize
= DeviceToMount
->StackSize
+ 1;
4217 NewDeviceObject
->Flags
&= ~DO_DEVICE_INITIALIZING
;
4219 InitializeListHead(&Vcb
->roots
);
4220 InitializeListHead(&Vcb
->drop_roots
);
4222 Vcb
->log_to_phys_loaded
= FALSE
;
4224 add_root(Vcb
, BTRFS_ROOT_CHUNK
, Vcb
->superblock
.chunk_tree_addr
, Vcb
->superblock
.chunk_root_generation
, NULL
);
4226 if (!Vcb
->chunk_root
) {
4227 ERR("Could not load chunk root.\n");
4228 Status
= STATUS_INTERNAL_ERROR
;
4232 InitializeListHead(&Vcb
->sys_chunks
);
4233 Status
= load_sys_chunks(Vcb
);
4234 if (!NT_SUCCESS(Status
)) {
4235 ERR("load_sys_chunks returned %08x\n", Status
);
4239 InitializeListHead(&Vcb
->chunks
);
4240 InitializeListHead(&Vcb
->trees
);
4241 InitializeListHead(&Vcb
->trees_hash
);
4242 InitializeListHead(&Vcb
->all_fcbs
);
4243 InitializeListHead(&Vcb
->dirty_fcbs
);
4244 InitializeListHead(&Vcb
->dirty_filerefs
);
4245 InitializeListHead(&Vcb
->dirty_subvols
);
4246 InitializeListHead(&Vcb
->send_ops
);
4248 InitializeListHead(&Vcb
->DirNotifyList
);
4249 InitializeListHead(&Vcb
->scrub
.errors
);
4251 FsRtlNotifyInitializeSync(&Vcb
->NotifySync
);
4253 ExInitializePagedLookasideList(&Vcb
->tree_data_lookaside
, NULL
, NULL
, 0, sizeof(tree_data
), ALLOC_TAG
, 0);
4254 ExInitializePagedLookasideList(&Vcb
->traverse_ptr_lookaside
, NULL
, NULL
, 0, sizeof(traverse_ptr
), ALLOC_TAG
, 0);
4255 ExInitializePagedLookasideList(&Vcb
->batch_item_lookaside
, NULL
, NULL
, 0, sizeof(batch_item
), ALLOC_TAG
, 0);
4256 ExInitializePagedLookasideList(&Vcb
->fileref_lookaside
, NULL
, NULL
, 0, sizeof(file_ref
), ALLOC_TAG
, 0);
4257 ExInitializePagedLookasideList(&Vcb
->fcb_lookaside
, NULL
, NULL
, 0, sizeof(fcb
), ALLOC_TAG
, 0);
4258 ExInitializePagedLookasideList(&Vcb
->name_bit_lookaside
, NULL
, NULL
, 0, sizeof(name_bit
), ALLOC_TAG
, 0);
4259 ExInitializeNPagedLookasideList(&Vcb
->range_lock_lookaside
, NULL
, NULL
, 0, sizeof(range_lock
), ALLOC_TAG
, 0);
4260 ExInitializeNPagedLookasideList(&Vcb
->fileref_np_lookaside
, NULL
, NULL
, 0, sizeof(file_ref_nonpaged
), ALLOC_TAG
, 0);
4261 ExInitializeNPagedLookasideList(&Vcb
->fcb_np_lookaside
, NULL
, NULL
, 0, sizeof(fcb_nonpaged
), ALLOC_TAG
, 0);
4262 init_lookaside
= TRUE
;
4264 Vcb
->Vpb
= IrpSp
->Parameters
.MountVolume
.Vpb
;
4266 Status
= load_chunk_root(Vcb
, Irp
);
4267 if (!NT_SUCCESS(Status
)) {
4268 ERR("load_chunk_root returned %08x\n", Status
);
4272 if (Vcb
->superblock
.num_devices
> 1) {
4273 if (Vcb
->devices_loaded
< Vcb
->superblock
.num_devices
&& (!Vcb
->options
.allow_degraded
|| !finished_probing
)) {
4274 ERR("could not mount as %u device(s) missing\n", Vcb
->superblock
.num_devices
- Vcb
->devices_loaded
);
4276 IoRaiseInformationalHardError(IO_ERR_INTERNAL_ERROR
, NULL
, NULL
);
4278 Status
= STATUS_INTERNAL_ERROR
;
4282 if (dev
->readonly
&& !Vcb
->readonly
) {
4283 Vcb
->readonly
= TRUE
;
4285 le
= Vcb
->devices
.Flink
;
4286 while (le
!= &Vcb
->devices
) {
4287 device
* dev2
= CONTAINING_RECORD(le
, device
, list_entry
);
4289 if (dev2
->readonly
&& !dev2
->seeding
)
4292 if (!dev2
->readonly
) {
4293 Vcb
->readonly
= FALSE
;
4301 WARN("setting volume to readonly\n");
4304 if (dev
->readonly
) {
4305 WARN("setting volume to readonly as device is readonly\n");
4306 Vcb
->readonly
= TRUE
;
4310 add_root(Vcb
, BTRFS_ROOT_ROOT
, Vcb
->superblock
.root_tree_addr
, Vcb
->superblock
.generation
- 1, NULL
);
4312 if (!Vcb
->root_root
) {
4313 ERR("Could not load root of roots.\n");
4314 Status
= STATUS_INTERNAL_ERROR
;
4318 Status
= look_for_roots(Vcb
, Irp
);
4319 if (!NT_SUCCESS(Status
)) {
4320 ERR("look_for_roots returned %08x\n", Status
);
4324 if (!Vcb
->readonly
) {
4325 Status
= find_chunk_usage(Vcb
, Irp
);
4326 if (!NT_SUCCESS(Status
)) {
4327 ERR("find_chunk_usage returned %08x\n", Status
);
4332 InitializeListHead(&batchlist
);
4334 // We've already increased the generation by one
4335 if (!Vcb
->readonly
&& (
4336 Vcb
->options
.clear_cache
||
4337 (!(Vcb
->superblock
.compat_ro_flags
& BTRFS_COMPAT_RO_FLAGS_FREE_SPACE_CACHE
) && Vcb
->superblock
.generation
- 1 != Vcb
->superblock
.cache_generation
) ||
4338 (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
)))) {
4339 if (Vcb
->options
.clear_cache
)
4340 WARN("ClearCache option was set, clearing cache...\n");
4341 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
))
4342 WARN("clearing free-space tree created by buggy Linux driver\n");
4344 WARN("generation was %llx, free-space cache generation was %llx; clearing cache...\n", Vcb
->superblock
.generation
- 1, Vcb
->superblock
.cache_generation
);
4346 Status
= clear_free_space_cache(Vcb
, &batchlist
, Irp
);
4347 if (!NT_SUCCESS(Status
)) {
4348 ERR("clear_free_space_cache returned %08x\n", Status
);
4349 clear_batch_list(Vcb
, &batchlist
);
4354 Status
= commit_batch_list(Vcb
, &batchlist
, Irp
);
4355 if (!NT_SUCCESS(Status
)) {
4356 ERR("commit_batch_list returned %08x\n", Status
);
4360 Vcb
->volume_fcb
= create_fcb(Vcb
, NonPagedPool
);
4361 if (!Vcb
->volume_fcb
) {
4362 ERR("out of memory\n");
4363 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4367 Vcb
->volume_fcb
->Vcb
= Vcb
;
4368 Vcb
->volume_fcb
->sd
= NULL
;
4370 Vcb
->dummy_fcb
= create_fcb(Vcb
, NonPagedPool
);
4371 if (!Vcb
->dummy_fcb
) {
4372 ERR("out of memory\n");
4373 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4377 Vcb
->dummy_fcb
->Vcb
= Vcb
;
4378 Vcb
->dummy_fcb
->type
= BTRFS_TYPE_DIRECTORY
;
4379 Vcb
->dummy_fcb
->inode
= 2;
4380 Vcb
->dummy_fcb
->subvol
= Vcb
->root_root
;
4381 Vcb
->dummy_fcb
->atts
= FILE_ATTRIBUTE_DIRECTORY
;
4382 Vcb
->dummy_fcb
->inode_item
.st_nlink
= 1;
4383 Vcb
->dummy_fcb
->inode_item
.st_mode
= __S_IFDIR
;
4385 Vcb
->dummy_fcb
->hash_ptrs
= ExAllocatePoolWithTag(PagedPool
, sizeof(LIST_ENTRY
*) * 256, ALLOC_TAG
);
4386 if (!Vcb
->dummy_fcb
->hash_ptrs
) {
4387 ERR("out of memory\n");
4388 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4392 RtlZeroMemory(Vcb
->dummy_fcb
->hash_ptrs
, sizeof(LIST_ENTRY
*) * 256);
4394 Vcb
->dummy_fcb
->hash_ptrs_uc
= ExAllocatePoolWithTag(PagedPool
, sizeof(LIST_ENTRY
*) * 256, ALLOC_TAG
);
4395 if (!Vcb
->dummy_fcb
->hash_ptrs_uc
) {
4396 ERR("out of memory\n");
4397 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4401 RtlZeroMemory(Vcb
->dummy_fcb
->hash_ptrs_uc
, sizeof(LIST_ENTRY
*) * 256);
4403 root_fcb
= create_fcb(Vcb
, NonPagedPool
);
4405 ERR("out of memory\n");
4406 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4410 root_fcb
->Vcb
= Vcb
;
4411 root_fcb
->inode
= SUBVOL_ROOT_INODE
;
4412 root_fcb
->type
= BTRFS_TYPE_DIRECTORY
;
4414 #ifdef DEBUG_FCB_REFCOUNTS
4415 WARN("volume FCB = %p\n", Vcb
->volume_fcb
);
4416 WARN("root FCB = %p\n", root_fcb
);
4419 root_fcb
->subvol
= find_default_subvol(Vcb
, Irp
);
4421 if (!root_fcb
->subvol
) {
4422 ERR("could not find top subvol\n");
4423 Status
= STATUS_INTERNAL_ERROR
;
4427 Status
= load_dir_children(Vcb
, root_fcb
, TRUE
, Irp
);
4428 if (!NT_SUCCESS(Status
)) {
4429 ERR("load_dir_children returned %08x\n", Status
);
4433 searchkey
.obj_id
= root_fcb
->inode
;
4434 searchkey
.obj_type
= TYPE_INODE_ITEM
;
4435 searchkey
.offset
= 0xffffffffffffffff;
4437 Status
= find_item(Vcb
, root_fcb
->subvol
, &tp
, &searchkey
, FALSE
, Irp
);
4438 if (!NT_SUCCESS(Status
)) {
4439 ERR("error - find_item returned %08x\n", Status
);
4443 if (tp
.item
->key
.obj_id
!= searchkey
.obj_id
|| tp
.item
->key
.obj_type
!= searchkey
.obj_type
) {
4444 ERR("couldn't find INODE_ITEM for root directory\n");
4445 Status
= STATUS_INTERNAL_ERROR
;
4449 if (tp
.item
->size
> 0)
4450 RtlCopyMemory(&root_fcb
->inode_item
, tp
.item
->data
, min(sizeof(INODE_ITEM
), tp
.item
->size
));
4452 fcb_get_sd(root_fcb
, NULL
, TRUE
, Irp
);
4454 root_fcb
->atts
= get_file_attributes(Vcb
, root_fcb
->subvol
, root_fcb
->inode
, root_fcb
->type
, FALSE
, FALSE
, Irp
);
4456 Vcb
->root_fileref
= create_fileref(Vcb
);
4457 if (!Vcb
->root_fileref
) {
4458 ERR("out of memory\n");
4459 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4463 Vcb
->root_fileref
->fcb
= root_fcb
;
4464 InsertTailList(&root_fcb
->subvol
->fcbs
, &root_fcb
->list_entry
);
4465 InsertTailList(&Vcb
->all_fcbs
, &root_fcb
->list_entry_all
);
4467 root_fcb
->fileref
= Vcb
->root_fileref
;
4469 root_ccb
= ExAllocatePoolWithTag(PagedPool
, sizeof(ccb
), ALLOC_TAG
);
4471 ERR("out of memory\n");
4472 Status
= STATUS_INSUFFICIENT_RESOURCES
;
4476 /* HACK: stream file object seems to get deleted at some point
4477 * leading to use after free when installing ReactOS on
4479 * Workaround: leak a handle to the fileobject
4480 * XXX: Could be improved by storing it somewhere and releasing it
4481 * on dismount. Or even by referencing again the file object.
4484 Vcb
->root_file
= IoCreateStreamFileObject(NULL
, DeviceToMount
);
4488 Vcb
->root_file
= IoCreateStreamFileObjectEx(NULL
, DeviceToMount
, &Dummy
);
4491 Vcb
->root_file
->FsContext
= root_fcb
;
4492 Vcb
->root_file
->SectionObjectPointer
= &root_fcb
->nonpaged
->segment_object
;
4493 Vcb
->root_file
->Vpb
= DeviceObject
->Vpb
;
4495 RtlZeroMemory(root_ccb
, sizeof(ccb
));
4496 root_ccb
->NodeType
= BTRFS_NODE_TYPE_CCB
;
4497 root_ccb
->NodeSize
= sizeof(ccb
);
4499 Vcb
->root_file
->FsContext2
= root_ccb
;
4502 CcInitializeCacheMap(Vcb
->root_file
, (PCC_FILE_SIZES
)(&root_fcb
->Header
.AllocationSize
), FALSE
, cache_callbacks
, Vcb
->root_file
);
4503 } _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER
) {
4504 Status
= _SEH2_GetExceptionCode();
4508 le
= Vcb
->devices
.Flink
;
4509 while (le
!= &Vcb
->devices
) {
4510 device
* dev2
= CONTAINING_RECORD(le
, device
, list_entry
);
4512 Status
= find_disk_holes(Vcb
, dev2
, Irp
);
4513 if (!NT_SUCCESS(Status
)) {
4514 ERR("find_disk_holes returned %08x\n", Status
);
4521 NewDeviceObject
->Vpb
= IrpSp
->Parameters
.MountVolume
.Vpb
;
4522 IrpSp
->Parameters
.MountVolume
.Vpb
->DeviceObject
= NewDeviceObject
;
4523 IrpSp
->Parameters
.MountVolume
.Vpb
->Flags
|= VPB_MOUNTED
;
4524 NewDeviceObject
->Vpb
->VolumeLabelLength
= 4; // FIXME
4525 NewDeviceObject
->Vpb
->VolumeLabel
[0] = '?';
4526 NewDeviceObject
->Vpb
->VolumeLabel
[1] = 0;
4527 NewDeviceObject
->Vpb
->ReferenceCount
++; // FIXME - should we deref this at any point?
4529 KeInitializeEvent(&Vcb
->flush_thread_finished
, NotificationEvent
, FALSE
);
4531 Status
= PsCreateSystemThread(&Vcb
->flush_thread_handle
, 0, NULL
, NULL
, NULL
, flush_thread
, NewDeviceObject
);
4532 if (!NT_SUCCESS(Status
)) {
4533 ERR("PsCreateSystemThread returned %08x\n", Status
);
4537 Status
= create_calc_threads(NewDeviceObject
);
4538 if (!NT_SUCCESS(Status
)) {
4539 ERR("create_calc_threads returned %08x\n", Status
);
4543 Status
= registry_mark_volume_mounted(&Vcb
->superblock
.uuid
);
4544 if (!NT_SUCCESS(Status
))
4545 WARN("registry_mark_volume_mounted returned %08x\n", Status
);
4547 Status
= look_for_balance_item(Vcb
);
4548 if (!NT_SUCCESS(Status
) && Status
!= STATUS_NOT_FOUND
)
4549 WARN("look_for_balance_item returned %08x\n", Status
);
4551 Status
= STATUS_SUCCESS
;
4554 vde
->mounted_device
= NewDeviceObject
;
4556 ExInitializeResourceLite(&Vcb
->send_load_lock
);
4560 ExReleaseResourceLite(&pdode
->child_lock
);
4564 ExReleaseResourceLite(&Vcb
->tree_lock
);
4565 ExReleaseResourceLite(&Vcb
->load_lock
);
4568 if (!NT_SUCCESS(Status
)) {
4570 if (init_lookaside
) {
4571 ExDeletePagedLookasideList(&Vcb
->tree_data_lookaside
);
4572 ExDeletePagedLookasideList(&Vcb
->traverse_ptr_lookaside
);
4573 ExDeletePagedLookasideList(&Vcb
->batch_item_lookaside
);
4574 ExDeletePagedLookasideList(&Vcb
->fileref_lookaside
);
4575 ExDeletePagedLookasideList(&Vcb
->fcb_lookaside
);
4576 ExDeletePagedLookasideList(&Vcb
->name_bit_lookaside
);
4577 ExDeleteNPagedLookasideList(&Vcb
->range_lock_lookaside
);
4578 ExDeleteNPagedLookasideList(&Vcb
->fileref_np_lookaside
);
4579 ExDeleteNPagedLookasideList(&Vcb
->fcb_np_lookaside
);
4583 ObDereferenceObject(Vcb
->root_file
);
4584 else if (Vcb
->root_fileref
) {
4585 acquire_fcb_lock_exclusive(Vcb
);
4586 free_fileref(Vcb
, Vcb
->root_fileref
);
4587 release_fcb_lock(Vcb
);
4588 } else if (root_fcb
) {
4589 acquire_fcb_lock_exclusive(Vcb
);
4590 free_fcb(Vcb
, root_fcb
);
4591 release_fcb_lock(Vcb
);
4594 if (Vcb
->volume_fcb
) {
4595 acquire_fcb_lock_exclusive(Vcb
);
4596 free_fcb(Vcb
, Vcb
->volume_fcb
);
4597 release_fcb_lock(Vcb
);
4600 ExDeleteResourceLite(&Vcb
->tree_lock
);
4601 ExDeleteResourceLite(&Vcb
->load_lock
);
4602 ExDeleteResourceLite(&Vcb
->fcb_lock
);
4603 ExDeleteResourceLite(&Vcb
->chunk_lock
);
4604 ExDeleteResourceLite(&Vcb
->dirty_fcbs_lock
);
4605 ExDeleteResourceLite(&Vcb
->dirty_filerefs_lock
);
4606 ExDeleteResourceLite(&Vcb
->dirty_subvols_lock
);
4607 ExDeleteResourceLite(&Vcb
->scrub
.stats_lock
);
4609 if (Vcb
->devices
.Flink
) {
4610 while (!IsListEmpty(&Vcb
->devices
)) {
4611 device
* dev2
= CONTAINING_RECORD(RemoveHeadList(&Vcb
->devices
), device
, list_entry
);
4618 if (NewDeviceObject
)
4619 IoDeleteDevice(NewDeviceObject
);
4621 ExAcquireResourceExclusiveLite(&global_loading_lock
, TRUE
);
4622 InsertTailList(&VcbList
, &Vcb
->list_entry
);
4623 ExReleaseResourceLite(&global_loading_lock
);
4625 FsRtlNotifyVolumeEvent(Vcb
->root_file
, FSRTL_VOLUME_MOUNT
);
4628 TRACE("mount_vol done (status: %lx)\n", Status
);
4633 static NTSTATUS
verify_device(_In_ device_extension
* Vcb
, _Inout_ device
* dev
) {
4640 return STATUS_WRONG_VOLUME
;
4642 if (dev
->removable
) {
4643 IO_STATUS_BLOCK iosb
;
4645 Status
= dev_ioctl(dev
->devobj
, IOCTL_STORAGE_CHECK_VERIFY
, NULL
, 0, &cc
, sizeof(ULONG
), TRUE
, &iosb
);
4647 if (IoIsErrorUserInduced(Status
)) {
4648 ERR("IOCTL_STORAGE_CHECK_VERIFY returned %08x (user-induced)\n", Status
);
4651 pdo_device_extension
* pdode
= Vcb
->vde
->pdode
;
4653 BOOL changed
= FALSE
;
4655 ExAcquireResourceExclusiveLite(&pdode
->child_lock
, TRUE
);
4657 le2
= pdode
->children
.Flink
;
4658 while (le2
!= &pdode
->children
) {
4659 volume_child
* vc
= CONTAINING_RECORD(le2
, volume_child
, list_entry
);
4661 if (vc
->devobj
== dev
->devobj
) {
4662 TRACE("removing device\n");
4664 remove_volume_child(Vcb
->vde
, vc
, TRUE
);
4674 ExReleaseResourceLite(&pdode
->child_lock
);
4676 } else if (!NT_SUCCESS(Status
)) {
4677 ERR("IOCTL_STORAGE_CHECK_VERIFY returned %08x\n", Status
);
4679 } else if (iosb
.Information
< sizeof(ULONG
)) {
4680 ERR("iosb.Information was too short\n");
4681 return STATUS_INTERNAL_ERROR
;
4684 dev
->change_count
= cc
;
4687 to_read
= dev
->devobj
->SectorSize
== 0 ? sizeof(superblock
) : (ULONG
)sector_align(sizeof(superblock
), dev
->devobj
->SectorSize
);
4689 sb
= ExAllocatePoolWithTag(NonPagedPool
, to_read
, ALLOC_TAG
);
4691 ERR("out of memory\n");
4692 return STATUS_INSUFFICIENT_RESOURCES
;
4695 Status
= sync_read_phys(dev
->devobj
, superblock_addrs
[0], to_read
, (PUCHAR
)sb
, TRUE
);
4696 if (!NT_SUCCESS(Status
)) {
4697 ERR("Failed to read superblock: %08x\n", Status
);
4702 if (sb
->magic
!= BTRFS_MAGIC
) {
4703 ERR("not a BTRFS volume\n");
4705 return STATUS_WRONG_VOLUME
;
4708 crc32
= ~calc_crc32c(0xffffffff, (UINT8
*)&sb
->uuid
, (ULONG
)sizeof(superblock
) - sizeof(sb
->checksum
));
4709 TRACE("crc32 was %08x, expected %08x\n", crc32
, *((UINT32
*)sb
->checksum
));
4711 if (crc32
!= *((UINT32
*)sb
->checksum
)) {
4712 ERR("checksum error\n");
4714 return STATUS_WRONG_VOLUME
;
4717 if (RtlCompareMemory(&sb
->uuid
, &Vcb
->superblock
.uuid
, sizeof(BTRFS_UUID
)) != sizeof(BTRFS_UUID
)) {
4718 ERR("different UUIDs\n");
4720 return STATUS_WRONG_VOLUME
;
4725 dev
->devobj
->Flags
&= ~DO_VERIFY_VOLUME
;
4727 return STATUS_SUCCESS
;
4730 static NTSTATUS
verify_volume(_In_ PDEVICE_OBJECT devobj
) {
4731 device_extension
* Vcb
= devobj
->DeviceExtension
;
4734 UINT64 failed_devices
= 0;
4735 BOOL locked
= FALSE
, remove
= FALSE
;
4737 if (!(Vcb
->Vpb
->Flags
& VPB_MOUNTED
))
4738 return STATUS_WRONG_VOLUME
;
4740 if (!ExIsResourceAcquiredExclusive(&Vcb
->tree_lock
)) {
4741 ExAcquireResourceExclusiveLite(&Vcb
->tree_lock
, TRUE
);
4745 if (Vcb
->removing
) {
4746 if (locked
) ExReleaseResourceLite(&Vcb
->tree_lock
);
4747 return STATUS_WRONG_VOLUME
;
4750 InterlockedIncrement(&Vcb
->open_files
); // so pnp_surprise_removal doesn't uninit the device while we're still using it
4752 le
= Vcb
->devices
.Flink
;
4753 while (le
!= &Vcb
->devices
) {
4754 device
* dev
= CONTAINING_RECORD(le
, device
, list_entry
);
4756 Status
= verify_device(Vcb
, dev
);
4757 if (!NT_SUCCESS(Status
)) {
4760 if (dev
->devobj
&& Vcb
->options
.allow_degraded
)
4767 InterlockedDecrement(&Vcb
->open_files
);
4769 if (Vcb
->removing
&& Vcb
->open_files
== 0)
4773 ExReleaseResourceLite(&Vcb
->tree_lock
);
4780 if (failed_devices
== 0 || (Vcb
->options
.allow_degraded
&& failed_devices
< Vcb
->superblock
.num_devices
)) {
4781 Vcb
->Vpb
->RealDevice
->Flags
&= ~DO_VERIFY_VOLUME
;
4783 return STATUS_SUCCESS
;
4789 _Dispatch_type_(IRP_MJ_FILE_SYSTEM_CONTROL
)
4790 _Function_class_(DRIVER_DISPATCH
)
4792 static NTSTATUS NTAPI
drv_file_system_control(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
4794 static NTSTATUS
drv_file_system_control(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
4796 PIO_STACK_LOCATION IrpSp
;
4798 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
4801 FsRtlEnterFileSystem();
4803 TRACE("file system control\n");
4805 top_level
= is_top_level(Irp
);
4807 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
4808 Status
= vol_file_system_control(DeviceObject
, Irp
);
4810 } else if (!Vcb
|| (Vcb
->type
!= VCB_TYPE_FS
&& Vcb
->type
!= VCB_TYPE_CONTROL
)) {
4811 Status
= STATUS_INVALID_PARAMETER
;
4815 Status
= STATUS_NOT_IMPLEMENTED
;
4817 IrpSp
= IoGetCurrentIrpStackLocation( Irp
);
4819 Irp
->IoStatus
.Information
= 0;
4821 switch (IrpSp
->MinorFunction
) {
4822 case IRP_MN_MOUNT_VOLUME
:
4823 TRACE("IRP_MN_MOUNT_VOLUME\n");
4825 Status
= mount_vol(DeviceObject
, Irp
);
4828 case IRP_MN_KERNEL_CALL
:
4829 TRACE("IRP_MN_KERNEL_CALL\n");
4831 Status
= fsctl_request(DeviceObject
, &Irp
, IrpSp
->Parameters
.FileSystemControl
.FsControlCode
);
4834 case IRP_MN_USER_FS_REQUEST
:
4835 TRACE("IRP_MN_USER_FS_REQUEST\n");
4837 Status
= fsctl_request(DeviceObject
, &Irp
, IrpSp
->Parameters
.FileSystemControl
.FsControlCode
);
4840 case IRP_MN_VERIFY_VOLUME
:
4841 TRACE("IRP_MN_VERIFY_VOLUME\n");
4843 Status
= verify_volume(DeviceObject
);
4845 if (!NT_SUCCESS(Status
) && Vcb
->Vpb
->Flags
& VPB_MOUNTED
) {
4846 ExAcquireResourceExclusiveLite(&Vcb
->tree_lock
, TRUE
);
4847 Vcb
->removing
= TRUE
;
4848 ExReleaseResourceLite(&Vcb
->tree_lock
);
4858 TRACE("returning %08x\n", Status
);
4861 Irp
->IoStatus
.Status
= Status
;
4863 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
4867 IoSetTopLevelIrp(NULL
);
4869 FsRtlExitFileSystem();
4874 _Dispatch_type_(IRP_MJ_LOCK_CONTROL
)
4875 _Function_class_(DRIVER_DISPATCH
)
4877 static NTSTATUS NTAPI
drv_lock_control(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
4879 static NTSTATUS
drv_lock_control(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
4882 PIO_STACK_LOCATION IrpSp
= IoGetCurrentIrpStackLocation(Irp
);
4883 fcb
* fcb
= IrpSp
->FileObject
->FsContext
;
4884 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
4887 FsRtlEnterFileSystem();
4889 top_level
= is_top_level(Irp
);
4891 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
4892 Status
= vol_lock_control(DeviceObject
, Irp
);
4894 Irp
->IoStatus
.Status
= Status
;
4895 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
4900 TRACE("lock control\n");
4902 Status
= FsRtlProcessFileLock(&fcb
->lock
, Irp
, NULL
);
4904 fcb
->Header
.IsFastIoPossible
= fast_io_possible(fcb
);
4907 TRACE("returning %08x\n", Status
);
4910 IoSetTopLevelIrp(NULL
);
4912 FsRtlExitFileSystem();
4917 _Dispatch_type_(IRP_MJ_SHUTDOWN
)
4918 _Function_class_(DRIVER_DISPATCH
)
4920 static NTSTATUS NTAPI
drv_shutdown(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
4922 static NTSTATUS
drv_shutdown(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
4926 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
4928 LIST_ENTRY
*Vcble
, *le
;
4931 FsRtlEnterFileSystem();
4933 TRACE("shutdown\n");
4935 top_level
= is_top_level(Irp
);
4937 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
4938 Status
= vol_shutdown(DeviceObject
, Irp
);
4942 Status
= STATUS_SUCCESS
;
4944 shutting_down
= TRUE
;
4945 KeSetEvent(&mountmgr_thread_event
, 0, FALSE
);
4948 while (!IsListEmpty(&VcbList
)) {
4949 Vcb
= CONTAINING_RECORD(VcbList
.Flink
, device_extension
, list_entry
);
4951 TRACE("shutting down Vcb %p\n", Vcb
);
4956 Vcble
= VcbList
.Flink
;
4957 while (Vcble
!= &VcbList
) {
4958 Vcb
= CONTAINING_RECORD(Vcble
, device_extension
, list_entry
);
4960 TRACE("shutting down Vcb %p\n", Vcb
);
4962 if (Vcb
->balance
.thread
) {
4963 Vcb
->balance
.paused
= FALSE
;
4964 Vcb
->balance
.stopping
= TRUE
;
4965 KeSetEvent(&Vcb
->balance
.event
, 0, FALSE
);
4966 KeWaitForSingleObject(&Vcb
->balance
.finished
, Executive
, KernelMode
, FALSE
, NULL
);
4969 if (Vcb
->scrub
.thread
) {
4970 Vcb
->scrub
.paused
= FALSE
;
4971 Vcb
->scrub
.stopping
= TRUE
;
4972 KeSetEvent(&Vcb
->scrub
.event
, 0, FALSE
);
4973 KeWaitForSingleObject(&Vcb
->scrub
.finished
, Executive
, KernelMode
, FALSE
, NULL
);
4976 if (Vcb
->running_sends
!= 0) {
4977 BOOL send_cancelled
= FALSE
;
4979 ExAcquireResourceExclusiveLite(&Vcb
->send_load_lock
, TRUE
);
4981 le
= Vcb
->send_ops
.Flink
;
4982 while (le
!= &Vcb
->send_ops
) {
4983 send_info
* send
= CONTAINING_RECORD(le
, send_info
, list_entry
);
4985 if (!send
->cancelling
) {
4986 send
->cancelling
= TRUE
;
4987 send_cancelled
= TRUE
;
4989 KeSetEvent(&send
->cleared_event
, 0, FALSE
);
4995 ExReleaseResourceLite(&Vcb
->send_load_lock
);
4997 if (send_cancelled
) {
4998 while (Vcb
->running_sends
!= 0) {
4999 ExAcquireResourceExclusiveLite(&Vcb
->send_load_lock
, TRUE
);
5000 ExReleaseResourceLite(&Vcb
->send_load_lock
);
5005 ExAcquireResourceExclusiveLite(&Vcb
->tree_lock
, TRUE
);
5007 if (Vcb
->need_write
&& !Vcb
->readonly
) {
5008 Status
= do_write(Vcb
, Irp
);
5010 if (!NT_SUCCESS(Status
))
5011 ERR("do_write returned %08x\n", Status
);
5014 Vcb
->removing
= TRUE
;
5016 ExReleaseResourceLite(&Vcb
->tree_lock
);
5017 Vcble
= Vcble
->Flink
;
5023 ObDereferenceObject(comfo
);
5030 Irp
->IoStatus
.Status
= Status
;
5031 Irp
->IoStatus
.Information
= 0;
5033 IoCompleteRequest( Irp
, IO_NO_INCREMENT
);
5036 IoSetTopLevelIrp(NULL
);
5038 FsRtlExitFileSystem();
5043 _Dispatch_type_(IRP_MJ_POWER
)
5044 _Function_class_(DRIVER_DISPATCH
)
5046 static NTSTATUS NTAPI
drv_power(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
5048 static NTSTATUS
drv_power(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
5051 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
5054 FsRtlEnterFileSystem();
5056 top_level
= is_top_level(Irp
);
5058 Irp
->IoStatus
.Information
= 0;
5060 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
5061 Status
= vol_power(DeviceObject
, Irp
);
5063 Irp
->IoStatus
.Status
= Status
;
5064 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
5067 } else if (Vcb
&& Vcb
->type
== VCB_TYPE_FS
) {
5068 IoSkipCurrentIrpStackLocation(Irp
);
5070 Status
= IoCallDriver(Vcb
->Vpb
->RealDevice
, Irp
);
5075 Status
= STATUS_INVALID_DEVICE_REQUEST
;
5076 Irp
->IoStatus
.Status
= Status
;
5077 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
5081 IoSetTopLevelIrp(NULL
);
5083 FsRtlExitFileSystem();
5088 _Dispatch_type_(IRP_MJ_SYSTEM_CONTROL
)
5089 _Function_class_(DRIVER_DISPATCH
)
5091 static NTSTATUS NTAPI
drv_system_control(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
5093 static NTSTATUS
drv_system_control(_In_ PDEVICE_OBJECT DeviceObject
, _In_ PIRP Irp
) {
5096 device_extension
* Vcb
= DeviceObject
->DeviceExtension
;
5099 FsRtlEnterFileSystem();
5101 top_level
= is_top_level(Irp
);
5103 Irp
->IoStatus
.Information
= 0;
5105 if (Vcb
&& Vcb
->type
== VCB_TYPE_VOLUME
) {
5106 volume_device_extension
* vde
= DeviceObject
->DeviceExtension
;
5108 IoSkipCurrentIrpStackLocation(Irp
);
5110 Status
= IoCallDriver(vde
->pdo
, Irp
);
5113 } else if (Vcb
&& Vcb
->type
== VCB_TYPE_FS
) {
5114 IoSkipCurrentIrpStackLocation(Irp
);
5116 Status
= IoCallDriver(Vcb
->Vpb
->RealDevice
, Irp
);
5121 Status
= Irp
->IoStatus
.Status
;
5122 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
5126 IoSetTopLevelIrp(NULL
);
5128 FsRtlExitFileSystem();
5133 BOOL
is_file_name_valid(_In_ PUNICODE_STRING us
, _In_ BOOL posix
) {
5136 if (us
->Length
< sizeof(WCHAR
))
5139 if (us
->Length
> 255 * sizeof(WCHAR
))
5142 for (i
= 0; i
< us
->Length
/ sizeof(WCHAR
); i
++) {
5143 if (us
->Buffer
[i
] == '/' || us
->Buffer
[i
] == 0 ||
5144 (!posix
&& (us
->Buffer
[i
] == '<' || us
->Buffer
[i
] == '>' || us
->Buffer
[i
] == ':' || us
->Buffer
[i
] == '"' ||
5145 us
->Buffer
[i
] == '|' || us
->Buffer
[i
] == '?' || us
->Buffer
[i
] == '*' || (us
->Buffer
[i
] >= 1 && us
->Buffer
[i
] <= 31))))
5149 if (us
->Buffer
[0] == '.' && (us
->Length
== sizeof(WCHAR
) || (us
->Length
== 2 * sizeof(WCHAR
) && us
->Buffer
[1] == '.')))
5155 void chunk_lock_range(_In_ device_extension
* Vcb
, _In_ chunk
* c
, _In_ UINT64 start
, _In_ UINT64 length
) {
5160 rl
= ExAllocateFromNPagedLookasideList(&Vcb
->range_lock_lookaside
);
5162 ERR("out of memory\n");
5167 rl
->length
= length
;
5168 rl
->thread
= PsGetCurrentThread();
5173 ExAcquireResourceExclusiveLite(&c
->range_locks_lock
, TRUE
);
5175 le
= c
->range_locks
.Flink
;
5176 while (le
!= &c
->range_locks
) {
5177 range_lock
* rl2
= CONTAINING_RECORD(le
, range_lock
, list_entry
);
5179 if (rl2
->start
< start
+ length
&& rl2
->start
+ rl2
->length
> start
&& rl2
->thread
!= PsGetCurrentThread()) {
5188 InsertTailList(&c
->range_locks
, &rl
->list_entry
);
5190 ExReleaseResourceLite(&c
->range_locks_lock
);
5194 KeClearEvent(&c
->range_locks_event
);
5196 ExReleaseResourceLite(&c
->range_locks_lock
);
5198 KeWaitForSingleObject(&c
->range_locks_event
, UserRequest
, KernelMode
, FALSE
, NULL
);
5202 void chunk_unlock_range(_In_ device_extension
* Vcb
, _In_ chunk
* c
, _In_ UINT64 start
, _In_ UINT64 length
) {
5205 ExAcquireResourceExclusiveLite(&c
->range_locks_lock
, TRUE
);
5207 le
= c
->range_locks
.Flink
;
5208 while (le
!= &c
->range_locks
) {
5209 range_lock
* rl
= CONTAINING_RECORD(le
, range_lock
, list_entry
);
5211 if (rl
->start
== start
&& rl
->length
== length
) {
5212 RemoveEntryList(&rl
->list_entry
);
5213 ExFreeToNPagedLookasideList(&Vcb
->range_lock_lookaside
, rl
);
5220 KeSetEvent(&c
->range_locks_event
, 0, FALSE
);
5222 ExReleaseResourceLite(&c
->range_locks_lock
);
5225 void log_device_error(_In_ device_extension
* Vcb
, _Inout_ device
* dev
, _In_
int error
) {
5226 dev
->stats
[error
]++;
5227 dev
->stats_changed
= TRUE
;
5228 Vcb
->stats_changed
= TRUE
;
5232 _Function_class_(KSTART_ROUTINE
)
5233 static void serial_thread(void* context
) {
5234 LARGE_INTEGER due_time
;
5239 KeInitializeTimer(&timer
);
5241 due_time
.QuadPart
= (UINT64
)-10000000;
5243 KeSetTimer(&timer
, due_time
, NULL
);
5246 KeWaitForSingleObject(&timer
, Executive
, KernelMode
, FALSE
, NULL
);
5253 KeSetTimer(&timer
, due_time
, NULL
);
5256 KeCancelTimer(&timer
);
5258 PsTerminateSystemThread(STATUS_SUCCESS
);
5260 serial_thread_handle
= NULL
;
5263 static void init_serial(BOOL first_time
) {
5266 Status
= IoGetDeviceObjectPointer(&log_device
, FILE_WRITE_DATA
, &comfo
, &comdo
);
5267 if (!NT_SUCCESS(Status
)) {
5268 ERR("IoGetDeviceObjectPointer returned %08x\n", Status
);
5273 Status
= PsCreateSystemThread(&serial_thread_handle
, 0, NULL
, NULL
, NULL
, serial_thread
, NULL
);
5274 if (!NT_SUCCESS(Status
)) {
5275 ERR("PsCreateSystemThread returned %08x\n", Status
);
5284 static void check_cpu() {
5285 unsigned int cpuInfo
[4];
5287 __get_cpuid(1, &cpuInfo
[0], &cpuInfo
[1], &cpuInfo
[2], &cpuInfo
[3]);
5288 have_sse42
= cpuInfo
[2] & bit_SSE4_2
;
5289 have_sse2
= cpuInfo
[3] & bit_SSE2
;
5291 __cpuid(cpuInfo
, 1);
5292 have_sse42
= cpuInfo
[2] & (1 << 20);
5293 have_sse2
= cpuInfo
[3] & (1 << 26);
5297 TRACE("SSE4.2 is supported\n");
5299 TRACE("SSE4.2 not supported\n");
5302 TRACE("SSE2 is supported\n");
5304 TRACE("SSE2 is not supported\n");
5309 static void init_logging() {
5310 ExAcquireResourceExclusiveLite(&log_lock
, TRUE
);
5312 if (log_device
.Length
> 0)
5314 else if (log_file
.Length
> 0) {
5316 OBJECT_ATTRIBUTES oa
;
5317 IO_STATUS_BLOCK iosb
;
5322 InitializeObjectAttributes(&oa
, &log_file
, OBJ_CASE_INSENSITIVE
| OBJ_KERNEL_HANDLE
, NULL
, NULL
);
5324 Status
= ZwCreateFile(&log_handle
, FILE_WRITE_DATA
, &oa
, &iosb
, NULL
, FILE_ATTRIBUTE_NORMAL
, FILE_SHARE_READ
,
5325 FILE_OPEN_IF
, FILE_NON_DIRECTORY_FILE
| FILE_WRITE_THROUGH
| FILE_SYNCHRONOUS_IO_ALERT
, NULL
, 0);
5327 if (!NT_SUCCESS(Status
)) {
5328 ERR("ZwCreateFile returned %08x\n", Status
);
5332 if (iosb
.Information
== FILE_OPENED
) { // already exists
5333 FILE_STANDARD_INFORMATION fsi
;
5334 FILE_POSITION_INFORMATION fpi
;
5336 static char delim
[] = "\n---\n";
5338 // move to end of file
5340 Status
= ZwQueryInformationFile(log_handle
, &iosb
, &fsi
, sizeof(FILE_STANDARD_INFORMATION
), FileStandardInformation
);
5342 if (!NT_SUCCESS(Status
)) {
5343 ERR("ZwQueryInformationFile returned %08x\n", Status
);
5347 fpi
.CurrentByteOffset
= fsi
.EndOfFile
;
5349 Status
= ZwSetInformationFile(log_handle
, &iosb
, &fpi
, sizeof(FILE_POSITION_INFORMATION
), FilePositionInformation
);
5351 if (!NT_SUCCESS(Status
)) {
5352 ERR("ZwSetInformationFile returned %08x\n", Status
);
5356 Status
= ZwWriteFile(log_handle
, NULL
, NULL
, NULL
, &iosb
, delim
, (ULONG
)strlen(delim
), NULL
, NULL
);
5358 if (!NT_SUCCESS(Status
)) {
5359 ERR("ZwWriteFile returned %08x\n", Status
);
5364 dateline
= ExAllocatePoolWithTag(PagedPool
, 256, ALLOC_TAG
);
5367 ERR("out of memory\n");
5371 KeQuerySystemTime(&time
);
5373 RtlTimeToTimeFields(&time
, &tf
);
5375 sprintf(dateline
, "Starting logging at %04i-%02i-%02i %02i:%02i:%02i\n", tf
.Year
, tf
.Month
, tf
.Day
, tf
.Hour
, tf
.Minute
, tf
.Second
);
5377 Status
= ZwWriteFile(log_handle
, NULL
, NULL
, NULL
, &iosb
, dateline
, (ULONG
)strlen(dateline
), NULL
, NULL
);
5379 ExFreePool(dateline
);
5381 if (!NT_SUCCESS(Status
)) {
5382 ERR("ZwWriteFile returned %08x\n", Status
);
5388 ExReleaseResourceLite(&log_lock
);
5392 _Function_class_(KSTART_ROUTINE
)
5394 static void NTAPI
degraded_wait_thread(_In_
void* context
) {
5396 static void degraded_wait_thread(_In_
void* context
) {
5399 LARGE_INTEGER delay
;
5403 KeInitializeTimer(&timer
);
5405 delay
.QuadPart
= -30000000; // wait three seconds
5406 KeSetTimer(&timer
, delay
, NULL
);
5407 KeWaitForSingleObject(&timer
, Executive
, KernelMode
, FALSE
, NULL
);
5409 TRACE("timer expired\n");
5411 degraded_wait
= FALSE
;
5413 ZwClose(degraded_wait_handle
);
5414 degraded_wait_handle
= NULL
;
5416 PsTerminateSystemThread(STATUS_SUCCESS
);
5420 NTSTATUS NTAPI
AddDevice(PDRIVER_OBJECT DriverObject
, PDEVICE_OBJECT PhysicalDeviceObject
) {
5422 NTSTATUS
AddDevice(PDRIVER_OBJECT DriverObject
, PDEVICE_OBJECT PhysicalDeviceObject
) {
5426 UNICODE_STRING volname
;
5428 pdo_device_extension
* pdode
= NULL
;
5429 PDEVICE_OBJECT voldev
;
5430 volume_device_extension
* vde
;
5432 TRACE("(%p, %p)\n", DriverObject
, PhysicalDeviceObject
);
5434 ExAcquireResourceSharedLite(&pdo_list_lock
, TRUE
);
5436 le
= pdo_list
.Flink
;
5437 while (le
!= &pdo_list
) {
5438 pdo_device_extension
* pdode2
= CONTAINING_RECORD(le
, pdo_device_extension
, list_entry
);
5440 if (pdode2
->pdo
== PhysicalDeviceObject
) {
5449 WARN("unrecognized PDO %p\n", PhysicalDeviceObject
);
5450 Status
= STATUS_NOT_SUPPORTED
;
5454 ExAcquireResourceSharedLite(&pdode
->child_lock
, TRUE
);
5456 volname
.Length
= volname
.MaximumLength
= (USHORT
)((wcslen(BTRFS_VOLUME_PREFIX
) + 36 + 1) * sizeof(WCHAR
));
5457 volname
.Buffer
= ExAllocatePoolWithTag(PagedPool
, volname
.MaximumLength
, ALLOC_TAG
); // FIXME - when do we free this?
5459 if (!volname
.Buffer
) {
5460 ERR("out of memory\n");
5461 Status
= STATUS_INSUFFICIENT_RESOURCES
;
5465 RtlCopyMemory(volname
.Buffer
, BTRFS_VOLUME_PREFIX
, wcslen(BTRFS_VOLUME_PREFIX
) * sizeof(WCHAR
));
5467 j
= (ULONG
)wcslen(BTRFS_VOLUME_PREFIX
);
5468 for (i
= 0; i
< 16; i
++) {
5469 volname
.Buffer
[j
] = hex_digit(pdode
->uuid
.uuid
[i
] >> 4); j
++;
5470 volname
.Buffer
[j
] = hex_digit(pdode
->uuid
.uuid
[i
] & 0xf); j
++;
5472 if (i
== 3 || i
== 5 || i
== 7 || i
== 9) {
5473 volname
.Buffer
[j
] = '-';
5478 volname
.Buffer
[j
] = '}';
5480 Status
= IoCreateDevice(drvobj
, sizeof(volume_device_extension
), &volname
, FILE_DEVICE_DISK
,
5481 RtlIsNtDdiVersionAvailable(NTDDI_WIN8
) ? FILE_DEVICE_ALLOW_APPCONTAINER_TRAVERSAL
: 0, FALSE
, &voldev
);
5482 if (!NT_SUCCESS(Status
)) {
5483 ERR("IoCreateDevice returned %08x\n", Status
);
5487 voldev
->SectorSize
= PhysicalDeviceObject
->SectorSize
;
5488 voldev
->Flags
|= DO_DIRECT_IO
;
5490 vde
= voldev
->DeviceExtension
;
5491 vde
->type
= VCB_TYPE_VOLUME
;
5492 vde
->name
= volname
;
5493 vde
->device
= voldev
;
5494 vde
->mounted_device
= NULL
;
5495 vde
->pdo
= PhysicalDeviceObject
;
5497 vde
->removing
= FALSE
;
5498 vde
->open_count
= 0;
5500 Status
= IoRegisterDeviceInterface(PhysicalDeviceObject
, &GUID_DEVINTERFACE_VOLUME
, NULL
, &vde
->bus_name
);
5501 if (!NT_SUCCESS(Status
))
5502 WARN("IoRegisterDeviceInterface returned %08x\n", Status
);
5504 vde
->attached_device
= IoAttachDeviceToDeviceStack(voldev
, PhysicalDeviceObject
);
5508 if (pdode
->removable
)
5509 voldev
->Characteristics
|= FILE_REMOVABLE_MEDIA
;
5511 voldev
->Flags
&= ~DO_DEVICE_INITIALIZING
;
5513 Status
= IoSetDeviceInterfaceState(&vde
->bus_name
, TRUE
);
5514 if (!NT_SUCCESS(Status
))
5515 WARN("IoSetDeviceInterfaceState returned %08x\n", Status
);
5517 Status
= STATUS_SUCCESS
;
5520 ExReleaseResourceLite(&pdode
->child_lock
);
5523 ExReleaseResourceLite(&pdo_list_lock
);
5528 _Function_class_(DRIVER_INITIALIZE
)
5530 NTSTATUS NTAPI
DriverEntry(_In_ PDRIVER_OBJECT DriverObject
, _In_ PUNICODE_STRING RegistryPath
) {
5532 NTSTATUS
DriverEntry(_In_ PDRIVER_OBJECT DriverObject
, _In_ PUNICODE_STRING RegistryPath
) {
5535 PDEVICE_OBJECT DeviceObject
;
5536 UNICODE_STRING device_nameW
;
5537 UNICODE_STRING dosdevice_nameW
;
5538 control_device_extension
* cde
;
5540 OBJECT_ATTRIBUTES oa
;
5543 InitializeListHead(&uid_map_list
);
5544 InitializeListHead(&gid_map_list
);
5547 ExInitializeResourceLite(&log_lock
);
5549 ExInitializeResourceLite(&mapping_lock
);
5551 log_device
.Buffer
= NULL
;
5552 log_device
.Length
= log_device
.MaximumLength
= 0;
5553 log_file
.Buffer
= NULL
;
5554 log_file
.Length
= log_file
.MaximumLength
= 0;
5556 registry_path
.Length
= registry_path
.MaximumLength
= RegistryPath
->Length
;
5557 registry_path
.Buffer
= ExAllocatePoolWithTag(PagedPool
, registry_path
.Length
, ALLOC_TAG
);
5559 if (!registry_path
.Buffer
) {
5560 ERR("out of memory\n");
5561 return STATUS_INSUFFICIENT_RESOURCES
;
5564 RtlCopyMemory(registry_path
.Buffer
, RegistryPath
->Buffer
, registry_path
.Length
);
5566 read_registry(®istry_path
, FALSE
);
5569 if (debug_log_level
> 0)
5575 TRACE("DriverEntry\n");
5581 if (RtlIsNtDdiVersionAvailable(NTDDI_WIN8
)) {
5582 UNICODE_STRING name
;
5583 tPsIsDiskCountersEnabled fPsIsDiskCountersEnabled
;
5585 RtlInitUnicodeString(&name
, L
"PsIsDiskCountersEnabled");
5586 fPsIsDiskCountersEnabled
= (tPsIsDiskCountersEnabled
)MmGetSystemRoutineAddress(&name
);
5588 if (fPsIsDiskCountersEnabled
) {
5589 diskacc
= fPsIsDiskCountersEnabled();
5591 RtlInitUnicodeString(&name
, L
"PsUpdateDiskCounters");
5592 fPsUpdateDiskCounters
= (tPsUpdateDiskCounters
)MmGetSystemRoutineAddress(&name
);
5594 if (!fPsUpdateDiskCounters
)
5597 RtlInitUnicodeString(&name
, L
"FsRtlUpdateDiskCounters");
5598 fFsRtlUpdateDiskCounters
= (tFsRtlUpdateDiskCounters
)MmGetSystemRoutineAddress(&name
);
5601 RtlInitUnicodeString(&name
, L
"CcCopyReadEx");
5602 fCcCopyReadEx
= (tCcCopyReadEx
)MmGetSystemRoutineAddress(&name
);
5604 RtlInitUnicodeString(&name
, L
"CcCopyWriteEx");
5605 fCcCopyWriteEx
= (tCcCopyWriteEx
)MmGetSystemRoutineAddress(&name
);
5607 RtlInitUnicodeString(&name
, L
"CcSetAdditionalCacheAttributesEx");
5608 fCcSetAdditionalCacheAttributesEx
= (tCcSetAdditionalCacheAttributesEx
)MmGetSystemRoutineAddress(&name
);
5610 fPsUpdateDiskCounters
= NULL
;
5611 fCcCopyReadEx
= NULL
;
5612 fCcCopyWriteEx
= NULL
;
5613 fCcSetAdditionalCacheAttributesEx
= NULL
;
5614 fFsRtlUpdateDiskCounters
= NULL
;
5617 drvobj
= DriverObject
;
5619 DriverObject
->DriverUnload
= DriverUnload
;
5621 DriverObject
->DriverExtension
->AddDevice
= AddDevice
;
5624 DriverObject
->MajorFunction
[IRP_MJ_CREATE
] = drv_create
;
5625 DriverObject
->MajorFunction
[IRP_MJ_CLOSE
] = drv_close
;
5626 DriverObject
->MajorFunction
[IRP_MJ_READ
] = drv_read
;
5627 DriverObject
->MajorFunction
[IRP_MJ_WRITE
] = drv_write
;
5628 DriverObject
->MajorFunction
[IRP_MJ_QUERY_INFORMATION
] = drv_query_information
;
5629 DriverObject
->MajorFunction
[IRP_MJ_SET_INFORMATION
] = drv_set_information
;
5630 DriverObject
->MajorFunction
[IRP_MJ_QUERY_EA
] = drv_query_ea
;
5631 DriverObject
->MajorFunction
[IRP_MJ_SET_EA
] = drv_set_ea
;
5632 DriverObject
->MajorFunction
[IRP_MJ_FLUSH_BUFFERS
] = drv_flush_buffers
;
5633 DriverObject
->MajorFunction
[IRP_MJ_QUERY_VOLUME_INFORMATION
] = drv_query_volume_information
;
5634 DriverObject
->MajorFunction
[IRP_MJ_SET_VOLUME_INFORMATION
] = drv_set_volume_information
;
5635 DriverObject
->MajorFunction
[IRP_MJ_DIRECTORY_CONTROL
] = drv_directory_control
;
5636 DriverObject
->MajorFunction
[IRP_MJ_FILE_SYSTEM_CONTROL
] = drv_file_system_control
;
5637 DriverObject
->MajorFunction
[IRP_MJ_DEVICE_CONTROL
] = drv_device_control
;
5638 DriverObject
->MajorFunction
[IRP_MJ_SHUTDOWN
] = drv_shutdown
;
5639 DriverObject
->MajorFunction
[IRP_MJ_LOCK_CONTROL
] = drv_lock_control
;
5640 DriverObject
->MajorFunction
[IRP_MJ_CLEANUP
] = drv_cleanup
;
5641 DriverObject
->MajorFunction
[IRP_MJ_QUERY_SECURITY
] = drv_query_security
;
5642 DriverObject
->MajorFunction
[IRP_MJ_SET_SECURITY
] = drv_set_security
;
5643 DriverObject
->MajorFunction
[IRP_MJ_POWER
] = drv_power
;
5644 DriverObject
->MajorFunction
[IRP_MJ_SYSTEM_CONTROL
] = drv_system_control
;
5645 DriverObject
->MajorFunction
[IRP_MJ_PNP
] = drv_pnp
;
5647 DriverObject
->MajorFunction
[IRP_MJ_CREATE
] = (PDRIVER_DISPATCH
)drv_create
;
5648 DriverObject
->MajorFunction
[IRP_MJ_CLOSE
] = (PDRIVER_DISPATCH
)drv_close
;
5649 DriverObject
->MajorFunction
[IRP_MJ_READ
] = (PDRIVER_DISPATCH
)drv_read
;
5650 DriverObject
->MajorFunction
[IRP_MJ_WRITE
] = (PDRIVER_DISPATCH
)drv_write
;
5651 DriverObject
->MajorFunction
[IRP_MJ_QUERY_INFORMATION
] = (PDRIVER_DISPATCH
)drv_query_information
;
5652 DriverObject
->MajorFunction
[IRP_MJ_SET_INFORMATION
] = (PDRIVER_DISPATCH
)drv_set_information
;
5653 DriverObject
->MajorFunction
[IRP_MJ_QUERY_EA
] = (PDRIVER_DISPATCH
)drv_query_ea
;
5654 DriverObject
->MajorFunction
[IRP_MJ_SET_EA
] = (PDRIVER_DISPATCH
)drv_set_ea
;
5655 DriverObject
->MajorFunction
[IRP_MJ_FLUSH_BUFFERS
] = (PDRIVER_DISPATCH
)drv_flush_buffers
;
5656 DriverObject
->MajorFunction
[IRP_MJ_QUERY_VOLUME_INFORMATION
] = (PDRIVER_DISPATCH
)drv_query_volume_information
;
5657 DriverObject
->MajorFunction
[IRP_MJ_SET_VOLUME_INFORMATION
] = (PDRIVER_DISPATCH
)drv_set_volume_information
;
5658 DriverObject
->MajorFunction
[IRP_MJ_DIRECTORY_CONTROL
] = (PDRIVER_DISPATCH
)drv_directory_control
;
5659 DriverObject
->MajorFunction
[IRP_MJ_FILE_SYSTEM_CONTROL
] = (PDRIVER_DISPATCH
)drv_file_system_control
;
5660 DriverObject
->MajorFunction
[IRP_MJ_DEVICE_CONTROL
] = (PDRIVER_DISPATCH
)drv_device_control
;
5661 DriverObject
->MajorFunction
[IRP_MJ_SHUTDOWN
] = (PDRIVER_DISPATCH
)drv_shutdown
;
5662 DriverObject
->MajorFunction
[IRP_MJ_LOCK_CONTROL
] = (PDRIVER_DISPATCH
)drv_lock_control
;
5663 DriverObject
->MajorFunction
[IRP_MJ_CLEANUP
] = (PDRIVER_DISPATCH
)drv_cleanup
;
5664 DriverObject
->MajorFunction
[IRP_MJ_QUERY_SECURITY
] = (PDRIVER_DISPATCH
)drv_query_security
;
5665 DriverObject
->MajorFunction
[IRP_MJ_SET_SECURITY
] = (PDRIVER_DISPATCH
)drv_set_security
;
5666 DriverObject
->MajorFunction
[IRP_MJ_POWER
] = (PDRIVER_DISPATCH
)drv_power
;
5667 DriverObject
->MajorFunction
[IRP_MJ_SYSTEM_CONTROL
] = (PDRIVER_DISPATCH
)drv_system_control
;
5668 DriverObject
->MajorFunction
[IRP_MJ_PNP
] = (PDRIVER_DISPATCH
)drv_pnp
;
5671 init_fast_io_dispatch(&DriverObject
->FastIoDispatch
);
5673 device_nameW
.Buffer
= device_name
;
5674 device_nameW
.Length
= device_nameW
.MaximumLength
= (USHORT
)wcslen(device_name
) * sizeof(WCHAR
);
5675 dosdevice_nameW
.Buffer
= dosdevice_name
;
5676 dosdevice_nameW
.Length
= dosdevice_nameW
.MaximumLength
= (USHORT
)wcslen(dosdevice_name
) * sizeof(WCHAR
);
5678 Status
= IoCreateDevice(DriverObject
, sizeof(control_device_extension
), &device_nameW
, FILE_DEVICE_DISK_FILE_SYSTEM
,
5679 FILE_DEVICE_SECURE_OPEN
, FALSE
, &DeviceObject
);
5680 if (!NT_SUCCESS(Status
)) {
5681 ERR("IoCreateDevice returned %08x\n", Status
);
5685 master_devobj
= DeviceObject
;
5686 cde
= (control_device_extension
*)master_devobj
->DeviceExtension
;
5688 RtlZeroMemory(cde
, sizeof(control_device_extension
));
5690 cde
->type
= VCB_TYPE_CONTROL
;
5692 DeviceObject
->Flags
&= ~DO_DEVICE_INITIALIZING
;
5694 Status
= IoCreateSymbolicLink(&dosdevice_nameW
, &device_nameW
);
5695 if (!NT_SUCCESS(Status
)) {
5696 ERR("IoCreateSymbolicLink returned %08x\n", Status
);
5700 Status
= init_cache();
5701 if (!NT_SUCCESS(Status
)) {
5702 ERR("init_cache returned %08x\n", Status
);
5706 InitializeListHead(&VcbList
);
5707 ExInitializeResourceLite(&global_loading_lock
);
5708 ExInitializeResourceLite(&pdo_list_lock
);
5710 InitializeListHead(&pdo_list
);
5712 InitializeObjectAttributes(&oa
, RegistryPath
, OBJ_CASE_INSENSITIVE
| OBJ_KERNEL_HANDLE
, NULL
, NULL
);
5713 Status
= ZwCreateKey(®h
, KEY_QUERY_VALUE
| KEY_ENUMERATE_SUB_KEYS
| KEY_NOTIFY
, &oa
, 0, NULL
, REG_OPTION_NON_VOLATILE
, &dispos
);
5714 /* ReactOS specific hack: allow BtrFS driver to start in 1st stage with no hive */
5716 if (!NT_SUCCESS(Status
)) {
5717 ERR("ZwCreateKey returned %08x\n", Status
);
5721 watch_registry(regh
);
5723 if (NT_SUCCESS(Status
)) {
5724 watch_registry(regh
);
5728 Status
= IoReportDetectedDevice(drvobj
, InterfaceTypeUndefined
, 0xFFFFFFFF, 0xFFFFFFFF,
5729 NULL
, NULL
, 0, &cde
->buspdo
);
5730 if (!NT_SUCCESS(Status
)) {
5731 ERR("IoReportDetectedDevice returned %08x\n", Status
);
5735 Status
= IoRegisterDeviceInterface(cde
->buspdo
, &BtrfsBusInterface
, NULL
, &cde
->bus_name
);
5736 if (!NT_SUCCESS(Status
))
5737 WARN("IoRegisterDeviceInterface returned %08x\n", Status
);
5739 cde
->attached_device
= IoAttachDeviceToDeviceStack(DeviceObject
, cde
->buspdo
);
5741 Status
= IoSetDeviceInterfaceState(&cde
->bus_name
, TRUE
);
5742 if (!NT_SUCCESS(Status
))
5743 WARN("IoSetDeviceInterfaceState returned %08x\n", Status
);
5745 DeviceObject
->Flags
&= ~DO_DEVICE_INITIALIZING
;
5747 IoInvalidateDeviceRelations(cde
->buspdo
, BusRelations
);
5749 Status
= PsCreateSystemThread(°raded_wait_handle
, 0, NULL
, NULL
, NULL
, degraded_wait_thread
, NULL
);
5750 if (!NT_SUCCESS(Status
))
5751 WARN("PsCreateSystemThread returned %08x\n", Status
);
5753 Status
= IoRegisterPlugPlayNotification(EventCategoryDeviceInterfaceChange
, PNPNOTIFY_DEVICE_INTERFACE_INCLUDE_EXISTING_INTERFACES
,
5754 (PVOID
)&GUID_DEVINTERFACE_VOLUME
, DriverObject
, volume_notification
, DriverObject
, ¬ification_entry2
);
5755 if (!NT_SUCCESS(Status
))
5756 ERR("IoRegisterPlugPlayNotification returned %08x\n", Status
);
5758 Status
= IoRegisterPlugPlayNotification(EventCategoryDeviceInterfaceChange
, PNPNOTIFY_DEVICE_INTERFACE_INCLUDE_EXISTING_INTERFACES
,
5759 (PVOID
)&GUID_DEVINTERFACE_HIDDEN_VOLUME
, DriverObject
, volume_notification
, DriverObject
, ¬ification_entry3
);
5760 if (!NT_SUCCESS(Status
))
5761 ERR("IoRegisterPlugPlayNotification returned %08x\n", Status
);
5763 Status
= IoRegisterPlugPlayNotification(EventCategoryDeviceInterfaceChange
, PNPNOTIFY_DEVICE_INTERFACE_INCLUDE_EXISTING_INTERFACES
,
5764 (PVOID
)&GUID_DEVINTERFACE_DISK
, DriverObject
, pnp_notification
, DriverObject
, ¬ification_entry
);
5765 if (!NT_SUCCESS(Status
))
5766 ERR("IoRegisterPlugPlayNotification returned %08x\n", Status
);
5768 finished_probing
= TRUE
;
5770 KeInitializeEvent(&mountmgr_thread_event
, NotificationEvent
, FALSE
);
5773 Status
= PsCreateSystemThread(&mountmgr_thread_handle
, 0, NULL
, NULL
, NULL
, mountmgr_thread
, NULL
);
5774 if (!NT_SUCCESS(Status
))
5775 WARN("PsCreateSystemThread returned %08x\n", Status
);
5778 IoRegisterFileSystem(DeviceObject
);
5780 return STATUS_SUCCESS
;