#define _WOF_H_
#include "wimlib/types.h"
+#include "wimlib/compiler.h"
#define WOF_CURRENT_VERSION 1
#define WOF_PROVIDER_WIM 1
u32 provider;
};
-/* WOF reparse points can't be directly manipulated on Windows; setting the
- * reparse data doesn't seem to work, and the WOF driver hides the reparse
- * points so their data can't be read from Windows 8.1 and later. Use the
- * ioctls (FSCTL_SET_EXTERNAL_BACKING, FSCTL_GET_EXTERNAL_BACKING,
- * FSCTL_DELETE_EXTERNAL_BACKING) instead. */
-#if 0
+/* On Windows, WOF reparse points can only be directly created when the WOF
+ * driver is NOT running on the volume. Otherwise, the WOF ioctl
+ * (FSCTL_SET_EXTERNAL_BACKING, FSCTL_GET_EXTERNAL_BACKING,
+ * FSCTL_DELETE_EXTERNAL_BACKING) must be used instead. */
+
/*
* Format of the reparse data of WoF (Windows Overlay File System Filter)
* reparse points. These include WIMBoot "pointer files".
*
+ * This is not documented by Microsoft!!!
+ *
* Notes:
+ * - 'struct wim_provider_rpdata' must be preceded by
+ * 'struct wof_external_info'.
* - Reparse tag is 0x80000017
* - Don't make these if the file has no unnamed data stream, has an empty
* unnamed data stream, or already is a reparse point.
* - There is nowhere to put named data streams. They have to copied
* literally to the reparse point file.
*/
-struct wof_rpdata_disk {
- struct wof_external_info info;
- union {
- struct {
- /* (Guess) Version of this structure --- set to 2. */
- u64 version;
-
- /* Integer ID that identifies the WIM. */
- u64 data_source_id;
-
- /* SHA1 message digest of the file's unnamed data
- * stream. */
- u8 stream_sha1[20];
-
- /* SHA1 message digest of the WIM's lookup table. */
- u8 wim_lookup_table_sha1[20];
-
- /* Uncompressed size of the file's unnamed data stream,
- * in bytes. */
- u64 stream_uncompressed_size;
-
- /* Compressed size of the file's unnamed data stream, in
- * bytes. If stream is stored uncompressed, set this
- * the same as the uncompressed size. */
- u64 stream_compressed_size;
-
- /* Byte offset of the file's unnamed data stream in the
- * WIM. */
- u64 stream_offset_in_wim;
- } wim;
- } provider_data;
-};
-#endif
+struct wim_provider_rpdata {
+ /* Set to 2. Uncertain meaning. */
+ le32 version;
+
+ /* 0 when WIM provider active, otherwise
+ * WIM_PROVIDER_EXTERNAL_FLAG_NOT_ACTIVE or
+ * WIM_PROVIDER_EXTERNAL_FLAG_SUSPENDED. */
+ le32 flags;
+
+ /* Integer ID that identifies the WIM. */
+ le64 data_source_id;
+
+ /* SHA1 message digest of the file's unnamed data stream. */
+ u8 resource_hash[20];
+
+ /* SHA1 message digest of the WIM's lookup table. */
+ u8 wim_lookup_table_hash[20];
+
+ /* Uncompressed size of the file's unnamed data stream, in bytes. */
+ le64 stream_uncompressed_size;
+
+ /* Compressed size of the file's unnamed data stream, in bytes. If
+ * stream is stored uncompressed, set this the same as the uncompressed
+ * size. */
+ le64 stream_compressed_size;
+
+ /* Byte offset of the file's unnamed data stream in the WIM. */
+ le64 stream_offset_in_wim;
+} _packed_attribute;
+
+/* WIM-specific information about a WIM data source */
+struct WimOverlay_dat_entry_1 {
+
+ /* Identifier for the WIM data source, (normally allocated by
+ * FSCTL_ADD_OVERLAY). Every 'WimOverlay_dat_entry_1' should have a
+ * different value for this. */
+ le64 data_source_id;
+
+ /* Byte offset, from the beginning of the file, of the corresponding
+ * 'struct WimOverlay_dat_entry_2' for this WIM data source. */
+ le32 entry_2_offset;
+
+ /* Size, in bytes, of the corresponding 'struct WimOverlay_dat_entry_2
+ * for this WIM data source, including wim_file_name and its null
+ * terminator. */
+ le32 entry_2_length;
+
+ /* Type of the WIM file: WIM_BOOT_OS_WIM or WIM_BOOT_NOT_OS_WIM. */
+ le32 wim_type;
+
+ /* Index of the image in the WIM to use??? (This doesn't really make
+ * sense, since WIM files combine streams for all images into a single
+ * table. Set to 1 if unsure...) */
+ le32 wim_index;
+
+ /* GUID of the WIM file (copied from the WIM header, offset +0x18). */
+ u8 guid[16];
+} _packed_attribute;
+
+/*
+ * Format of file: "\System Volume Information\WimOverlay.dat"
+ *
+ * Not documented by Microsoft.
+ *
+ * The file consists of a 'struct WimOverlay_dat_header' followed by one or more
+ * 'struct WimOverlay_dat_entry_1', followed by the same number of 'struct
+ * WimOverlay_dat_entry_2'. Note that 'struct WimOverlay_dat_entry_1' is of
+ * fixed length, whereas 'struct WimOverlay_dat_entry_2' is of variable length.
+ */
+struct WimOverlay_dat_header {
+ /* Set to WIMOVERLAY_DAT_MAGIC */
+ le32 magic;
+#define WIMOVERLAY_DAT_MAGIC 0x66436F57
+
+ /* Set to 1 (WIM_PROVIDER_CURRENT_VERSION) */
+ le32 wim_provider_version;
+
+ /* Set to 0x00000028 */
+ le32 unknown_0x08;
+
+ /* Set to number of WIMs registered;
+ * also the number of 'struct WimOverlay_dat_entry_1' that follow. */
+ le32 num_entries_1;
+
+ /* Set to number of WIMs registered;
+ * also the number of 'struct WimOverlay_dat_entry_2' that follow. */
+ le32 num_entries_2;
+
+ /* Set to 0 */
+ le32 unknown_0x14;
+
+ struct WimOverlay_dat_entry_1 entry_1s[];
+} _packed_attribute;
+
+/* Location information about a WIM data source */
+struct WimOverlay_dat_entry_2 {
+ /* Set to 0 */
+ le32 unknown_0x00;
+
+ /* Set to 0 */
+ le32 unknown_0x04;
+
+ /* Size, in bytes, of this 'struct WimOverlay_dat_entry_2', including
+ * wim_file_name and its null terminator. */
+ le32 entry_2_length;
+
+ /* Set to 0 */
+ le32 unknown_0x0C;
+
+ /* Set to 5 */
+ le32 unknown_0x10;
+
+ struct {
+ /* Set to 1 */
+ le32 unknown_0x14;
+
+ /* Size of this inner structure, in bytes. */
+ le32 inner_struct_size;
+
+ /* Set to 5 */
+ le32 unknown_0x1C;
+
+ /* Set to 6 */
+ le32 unknown_0x20;
+
+ /* Set to 0 */
+ le32 unknown_0x24;
+
+ /* Set to 0x48 */
+ le32 unknown_0x28;
+
+ /* Set to 0 */
+ le32 unknown_0x2C;
+
+ /*************************
+ * Partition information
+ ************************/
+
+ /* Partition identifier */
+ union {
+ /* (For MBR-formatted disks) */
+ struct {
+ /* Offset, in bytes, of the MBR partition, from
+ * the beginning of the disk. */
+ le64 part_start_offset;
+
+ /* Set to 0 */
+ le64 padding;
+ } mbr;
+
+ /* (For GPT-formatted disks) */
+ struct {
+ /* Unique GUID of the GPT partition */
+ u8 part_unique_guid[16];
+ } gpt;
+ } partition;
+
+ /* Set to 0 */
+ le32 unknown_0x40;
+
+ /***********************
+ * Disk information
+ **********************/
+
+ /* 1 for MBR, 0 for GPT */
+ le32 partition_table_type;
+ #define WIMOVERLAY_PARTITION_TYPE_MBR 1
+ #define WIMOVERLAY_PARTITION_TYPE_GPT 0
+
+ /* Disk identifier */
+ union {
+ /* (For MBR-formatted disks) */
+ struct {
+ /* 4-byte ID of the MBR disk */
+ le32 disk_id;
+
+ /* Set to 0 */
+ le32 padding[3];
+ } mbr;
+
+ /* (For GPT-formatted disks) */
+ struct {
+ /* GUID of the GPT disk */
+ u8 disk_guid[16];
+ } gpt;
+ } disk;
+
+ /* Set to 0. (This is the right size for some sort of optional
+ * GUID...) */
+ le32 unknown_0x58[4];
+
+ /**************************
+ * Location in filesystem
+ *************************/
+
+ /* Null-terminated path to WIM file. Begins with \ but does
+ * *not* include drive letter! */
+ utf16lechar wim_file_name[];
+ } _packed_attribute;
+} _packed_attribute;
+
+static inline void
+wof_check_structs(void)
+{
+ BUILD_BUG_ON(sizeof(struct WimOverlay_dat_header) != 24);
+ BUILD_BUG_ON(sizeof(struct WimOverlay_dat_entry_1) != 40);
+ BUILD_BUG_ON(sizeof(struct WimOverlay_dat_entry_2) != 104);
+}
/*****************************************************************************
*
u8 resource_hash[20];
};
+/*****************************************************************************
+ *
+ * --- FSCTL_GET_EXTERNAL_BACKING ---
+ *
+ * Get external backing information for the specified file.
+ *
+ * DeviceType: 9 (FILE_DEVICE_FILE_SYSTEM)
+ * Access: 0 (FILE_ANY_ACCESS)
+ * Function: 196
+ * Method: 0 (METHOD_BUFFERED)
+ *
+ * Input buffer: None
+ * Output buffer: 'struct wof_external_info' followed by provider-specific data
+ * ('struct wim_provider_external_info' in the case of WIM).
+ */
+#define FSCTL_GET_EXTERNAL_BACKING 0x90310
+
+/*****************************************************************************
+ *
+ * --- FSCTL_DELETE_EXTERNAL_BACKING ---
+ *
+ * Copy a file from its backing source to its volume, then disassociate it from
+ * its backing provider.
+ *
+ * DeviceType: 9 (FILE_DEVICE_FILE_SYSTEM)
+ * Access: 0 (FILE_ANY_ACCESS)
+ * Function: 197
+ * Method: 0 (METHOD_BUFFERED)
+ *
+ * Input buffer: None
+ * Output buffer: None
+ */
+#define FSCTL_DELETE_EXTERNAL_BACKING 0x90314
+
+/*****************************************************************************
+ *
+ * --- FSCTL_ENUM_EXTERNAL_BACKING ---
+ *
+ * Enumerate externally backed files on a volume.
+ *
+ * DeviceType: 9 (FILE_DEVICE_FILE_SYSTEM)
+ * Access: 0 (FILE_ANY_ACCESS)
+ * Function: 198
+ * Method: 0 (METHOD_BUFFERED)
+ *
+ * Input buffer: None
+ * Output buffer: A 16-byte buffer that receives the 128-bit file ID for the
+ * next externally backed file.
+ *
+ * The handle used may be either the volume handle or the handle for any file or
+ * directory on the volume.
+ *
+ * When all externally backed files on the volume have been enumerated, the
+ * function fails with ERROR_NO_MORE_FILES.
+ */
+#define FSCTL_ENUM_EXTERNAL_BACKING 0x90318
+
+/*****************************************************************************
+ *
+ * --- FSCTL_ENUM_OVERLAY ---
+ *
+ * Enumerates the volume's overlay sources from the specified provider.
+ *
+ * DeviceType: 9 (FILE_DEVICE_FILE_SYSTEM)
+ * Access: 0 (FILE_ANY_ACCESS)
+ * Function: 199
+ * Method: 3 (METHOD_NEITHER)
+ *
+ * Input buffer: 'struct wof_external_info' to specify the provider for which
+ * to enumerate the overlay sources.
+ *
+ * Output buffer: Provider-specific data. For the WIM provider, an array of
+ * 'struct wim_provider_overlay_entry'.
+ *
+ * This ioctl must be performed on the volume handle, such as \\.\C:
+ */
+#define FSCTL_ENUM_OVERLAY 0x9031F
+
+struct wim_provider_overlay_entry {
+ /* Byte offset of the next entry from the beginning of this structure,
+ * or 0 if there are no more entries. */
+ uint32_t next_entry_offset;
+
+ uint32_t padding;
+
+ /* Identifier for the WIM file. */
+ uint64_t data_source_id;
+
+ /* GUID of the WIM file. */
+ uint8_t guid[16];
+
+ /* Byte offset of the WIM's file name from the beginning of this
+ * structure. */
+ uint32_t wim_file_name_offset;
+
+ /* Type of WIM file: WIM_BOOT_OS_WIM or WIM_BOOT_NOT_OS_WIM. */
+ uint32_t wim_type;
+
+ /* Index of the backing image in the WIM??? (This doesn't really make
+ * sense, since WIM files combine streams for all images into a single
+ * table.) */
+ uint32_t wim_index;
+
+ /* 0 when WIM provider active, otherwise
+ * WIM_PROVIDER_EXTERNAL_FLAG_NOT_ACTIVE or
+ * WIM_PROVIDER_EXTERNAL_FLAG_SUSPENDED. */
+ uint32_t flags;
+
+ /* Full path to the WIM in the NT device namespace, e.g.
+ * "\Device\HardDiskVolume2\test.wim". Seems to be null-terminated,
+ * although you probably shouldn't assume so. */
+ wchar_t wim_file_name[];
+};
+
+
/*****************************************************************************
*
* --- FSCTL_ADD_OVERLAY ---
* Output buffer: Buffer large enough to receive any information resulting from
* the add operation. For the WIM provider, this must be an 8 byte buffer that
* receives the 64-bit WIM file ID.
+ *
+ * This ioctl must be performed on the volume handle, such as \\.\C:
*/
#define FSCTL_ADD_OVERLAY 0x98330
/* Number of bytes in wim_file_name. */
u32 wim_file_name_length;
- /* Full path to the WIM, e.g. "\??\d:\test-wimboot.wim".
+ /* Full path to the WIM, e.g. "\??\C:\test-wimboot.wim".
* Does NOT need to be null terminated (MS docs claim otherwise). */
wchar_t wim_file_name[];
};
+/*****************************************************************************
+ *
+ * --- FSCTL_REMOVE_OVERLAY ---
+ *
+ * Removes an external backing source from a volume.
+ *
+ * DeviceType: 9 (FILE_DEVICE_FILE_SYSTEM)
+ * Access: 2 (FILE_WRITE_ACCESS)
+ * Function: 205
+ * Method: 0 (METHOD_BUFFERED)
+ *
+ * Input buffer: 'struct wof_external_info' followed by provider-specific data
+ * ('struct wim_provider_remove_overlay_input' in the case of WIM).
+ *
+ * Output buffer: None
+ *
+ * This ioctl must be performed on the volume handle, such as \\.\C:
+ */
+#define FSCTL_REMOVE_OVERLAY 0x98334
+
+struct wim_provider_remove_overlay_input {
+ /* Integer ID that identifies the WIM. */
+ u64 data_source_id;
+};
+
+
+/*****************************************************************************
+ *
+ * --- FSCTL_UPDATE_OVERLAY ---
+ *
+ * Updates an overlay source for a volume.
+ *
+ * DeviceType: 9 (FILE_DEVICE_FILE_SYSTEM)
+ * Access: 2 (FILE_WRITE_ACCESS)
+ * Function: 206
+ * Method: 0 (METHOD_BUFFERED)
+ *
+ * Input buffer: 'struct wof_external_info' followed by provider-specific data
+ * ('struct wim_provider_update_overlay_input' in the case of WIM).
+ *
+ * Output buffer: None
+ *
+ * This ioctl must be performed on the volume handle, such as \\.\C:
+ */
+#define FSCTL_UPDATE_OVERLAY 0x98338
+
+struct wim_provider_update_overlay_input {
+ /* Integer ID that identifies the WIM data source. */
+ u64 data_source_id;
+
+ /* Byte offset of wim_file_name in this buffer, not including the
+ * preceding 'struct wof_external_info' (should be 16). */
+ u32 wim_file_name_offset;
+
+ /* Number of bytes in wim_file_name. */
+ u32 wim_file_name_length;
+
+ /* Full path to the WIM, e.g. "\??\C:\test-wimboot.wim".
+ * Does NOT need to be null terminated (MS docs claim otherwise).
+ * This WIM must be renamed from the original WIM, or at least be an
+ * identical copy of it! (Maybe the WIM's GUID field is checked.) */
+ wchar_t wim_file_name[];
+};
+
#endif /* _WOF_H_ */
git://wimlib.net / wimlib / blobdiff