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1793 lines
47 KiB
1793 lines
47 KiB
/*++
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Copyright (c) 1989-2000 Microsoft Corporation
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Module Name:
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UdfStruc.h
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Abstract:
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This module defines the data structures that make up the major internal
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parts of the Udfs file system.
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In-Memory structures:
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The global data structures with the UdfDataRecord. It contains a pointer
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to a File System Device object and a queue of Vcb's. There is a Vcb for
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every currently or previously mounted volumes. We may be in the process
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of tearing down the Vcb's which have been dismounted. The Vcb's are
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allocated as an extension to a volume device object.
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+---------+
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| UdfData | +--------+
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| | --> |FilSysDo|
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| | | |
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| | <+ +--------+
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+---------+ |
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| +--------+ +--------+
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| |VolDo | |VolDo |
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| | | | |
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| +--------+ +--------+
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+> |Vcb | <-> |Vcb | <-> ...
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| | | |
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+--------+ +--------+
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Each Vcb contains a table of all the Fcbs for the volume indexed by
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their FileId. Each Vcb contains a pointer to the root directory of
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the volume. Each directory Fcb contains a queue of child Lcb's for
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its children. Each Lcb is queued onto both its parent and child Fcb.
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There can also be detached subtrees due to open operations by Id where
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the Fcb's are not connected to the root.
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The following diagram shows the root structure.
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+--------+ +--------+
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| Vcb |---->| Fcb |-------------------------------------------------------------------+
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| | | Table |----------------------------------------------------------------+ |
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| |--+ | |-------------------------------------------------------------+ | |
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+--------+ | +--------+ | | |
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| | | | | | |
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| | | +---------------------------------------------+ | | |
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| V +-----------------------+ | | | |
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| +--------+ | | | | |
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| |RootFcb | V V | | |
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+->| | +-----+ +--------+ +--------+ | | |
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| |<-->| Lcb |<-->|Child | +-----+ |Child | | | |
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+--------+ +-----+ | Fcb |<-->| Lcb |<-->| Fcb |<--> ... | | |
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| | +-----+ | | | | |
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+--------+ +--------+ | | |
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| | |
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(Freestanding sub-tree) | | |
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+--------+ | | |
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|OpenById|<-------------------------------------------------------------+ | |
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| Dir | +--------+ | |
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| |--->|OpenById|<--------------------------------------------------+ |
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+--------+ | Child | +--------+ |
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| Dir |--->|OpenById|<---------------------------------------+
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+--------+ | Child |
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| File |
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+--------+
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Attached to each Directory Fcb is an prefix table containing the
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Lcbs pointing to children of this directory for which there is an Fcb.
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+--------+ +--------+
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| Dir | | Prefix |
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| Fcb |----->| Table |--------------------+
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| | | |-------+ |
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+--------+ +--------+ | |
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^ | | |
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| | | |
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| V V V
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| +--------+ +--------+ +--------+
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| | Lcb | | Lcb | | Lcb |
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+---------->| |<-->| |<-->| |
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+--------+ +--------+ +--------+
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Each file object open on a UDF volume contains two context pointers. The
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first will point back to the Fcb for the file object. The second, if present,
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points to a Ccb (ContextControlBlock) which contains the per-handle information.
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This includes the state of any directory enumeration and the Lcb used to open
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this file object.
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+--------+ +--------+ +--------+
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| Fcb |<------| File | | Ccb |
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| | | Object|--->| |
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| | | | | |
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+--------+ +--------+ +--------+
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^ ^
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| | +--------+ +--------+
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| | | File | | Ccb |
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| +---------| Object|--->| |
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| | | | |
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| +--------+ +--------+
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| +--------+
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| |Stream |
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+--------------| File |
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| Object|
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+--------+
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Synchronization:
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1. A resource in the UdfData synchronizes access to the Vcb queue. This
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is used during mount/verify/dismount operations.
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2. A resource in the Vcb is used to synchronize access to Vcb for
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open/close operations. Typically acquired shared, it
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is acquired exclusively to lock out these operations.
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3. A second resource in the Vcb is used to synchronize all file operations.
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Typically acquired shared, it is acquired exclusively to lock
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out all file operations. Acquiring both Vcb resources will lock
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the entire volume.
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4. A resource in the nonpaged Fcb will synchronize open/close operations
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on an Fcb.
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5. A fast mutex in the Vcb will protect access to the Fcb table and
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the open counts in the Vcb. It is also used to modify the reference
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counts in all Fcbs/Lcbs. This mutex cannot be acquired
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exclusely and is an end resource.
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6. A fast mutex in the Fcb will synchronize access to all Fcb fields
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which aren't synchronized in some other way. A thread may acquire
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mutexes for multiple Fcb's as long as it works it way toward the
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root of the tree. This mutex can also be acquired recursively.
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7. Normal locking order is UdfData/Vcb/Fcb starting at any point in this
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chain. The Vcb is required prior to acquiring resources for multiple
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files. Shared ownership of the Vcb is sufficient in this case.
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8. Normal locking order when acquiring multiple Fcb's is from some
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starting Fcb and walking towards the root of tree. Create typically
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walks down the tree. In this case we will attempt to acquire the
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next node optimistically and if that fails we will reference
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the current node in the tree, release it and acquire the next node.
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At that point it will be safe to reacquire the parent node.
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9. Locking order for the Fcb (via the fast mutex) will be from leaf of
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tree back towards the root. No other resource may be acquired
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after locking the Vcb (other than in-page reads).
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10. Cleanup operations only lock the Vcb and Fcb long enough to change the
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critical counts and share access fields. No reason to synchronize
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otherwise. None of the structures can go away from beneath us
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in this case.
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// @@BEGIN_DDKSPLIT
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Author:
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Dan Lovinger [DanLo] 31-May-1996
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Revision History:
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Tom Jolly [TomJolly] 1-March-2000 UDF 2.01 support
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// @@END_DDKSPLIT
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--*/
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#ifndef _UDFSTRUC_
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#define _UDFSTRUC_
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typedef PVOID PBCB;
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//
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// The following structure is used to encapsulate the converted timestamps for
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// straightforward referencing.
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//
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typedef struct _TIMESTAMP_BUNDLE {
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LARGE_INTEGER CreationTime;
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LARGE_INTEGER AccessTime;
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LARGE_INTEGER ModificationTime;
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} TIMESTAMP_BUNDLE, *PTIMESTAMP_BUNDLE;
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//
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// The UDF_DATA record is the top record in the UDF file system in-memory
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// data structure. This structure must be allocated from non-paged pool.
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//
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#define NUMBER_OF_FS_OBJECTS 2
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typedef struct _UDF_DATA {
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//
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// The type and size of this record (must be UDFS_NTC_DATA_HEADER)
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//
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NODE_TYPE_CODE NodeTypeCode;
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NODE_BYTE_SIZE NodeByteSize;
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//
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// A pointer to the Driver object we were initialized with
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//
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PDRIVER_OBJECT DriverObject;
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//
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// Vcb queue.
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//
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LIST_ENTRY VcbQueue;
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//
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// The following fields are used to allocate IRP context structures
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// using a lookaside list, and other fixed sized structures from a
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// small cache. We use the CdData mutex to protext these structures.
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//
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ULONG IrpContextDepth;
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ULONG IrpContextMaxDepth;
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SINGLE_LIST_ENTRY IrpContextList;
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//
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// Filesystem device objects for UDFS.
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//
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PDEVICE_OBJECT FileSystemDeviceObjects[NUMBER_OF_FS_OBJECTS];
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//
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// Following are used to manage the async and delayed close queue.
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//
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// FspCloseActive - Indicates whether there is a thread processing the
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// two close queues.
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// ReduceDelayedClose - Indicates that we have hit the upper threshold
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// for the delayed close queue and need to reduce it to lower threshold.
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//
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// AsyncCloseQueue - Queue of IrpContext waiting for async close operation.
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// AsyncCloseCount - Number of entries on the async close queue.
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//
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// DelayedCloseQueue - Queue of IrpContextLite waiting for delayed close
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// operation.
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// MaxDelayedCloseCount - Trigger delay close work at this threshold.
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// MinDelayedCloseCount - Turn off delay close work at this threshold.
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// DelayedCloseCount - Number of entries on the delayted close queue.
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//
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// CloseItem - Workqueue item used to start FspClose thread.
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//
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LIST_ENTRY AsyncCloseQueue;
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ULONG AsyncCloseCount;
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BOOLEAN FspCloseActive;
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BOOLEAN ReduceDelayedClose;
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USHORT PadUshort;
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//
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// The following fields describe the deferred close file objects.
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//
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LIST_ENTRY DelayedCloseQueue;
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ULONG DelayedCloseCount;
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ULONG MaxDelayedCloseCount;
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ULONG MinDelayedCloseCount;
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//
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// Fast mutex used to lock the fields of this structure.
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//
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PVOID UdfDataLockThread;
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FAST_MUTEX UdfDataMutex;
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//
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// A resource variable to control access to the global UDFS data record
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//
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ERESOURCE DataResource;
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//
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// Cache manager call back structure, which must be passed on each call
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// to CcInitializeCacheMap.
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//
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CACHE_MANAGER_CALLBACKS CacheManagerCallbacks;
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CACHE_MANAGER_CALLBACKS CacheManagerVolumeCallbacks;
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//
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// This is the ExWorkerItem that does both kinds of deferred closes.
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//
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WORK_QUEUE_ITEM CloseItem;
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} UDF_DATA, *PUDF_DATA;
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//
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// A PARTITION will record the VSN/LSN -> PSN retrieval information for a
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// partition reference. Since we do not support multi-volume 13346/UDF,
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// we will omit noting the volume sequence number that would tell us which
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// piece of media contained the partition.
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//
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// There are currently three types of partitions used during operation: physical,
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// sparable and virtual. However, since sparing merely adds another last layer
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// of quick indirection, we consider them as a minor extension of a physical
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// partition.
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//
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typedef enum _PARTITION_TYPE {
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Uninitialized,
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Physical,
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Virtual
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} PARTITION_TYPE, *PPARTITION_TYPE;
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//
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// A Physical partition corresponds to a single extent of the volume.
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//
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typedef struct _PARTITION_PHYSICAL {
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//
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// Starting Psn and length in sectors
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//
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ULONG Start;
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ULONG Length;
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//
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// The partition number is specified by the LVD, and refers to
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// a specific partition descriptor on the media. We use this
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// in the second pass of partition discovery.
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//
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ULONG PartitionNumber;
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PNSR_PART PartitionDescriptor;
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//
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// Spared partition map, saved temporarily between
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// logical volume descriptor analysis and partition
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// descriptor discover/pcb completion.
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//
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PPARTMAP_SPARABLE SparingMap;
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} PARTITION_PHYSICAL, *PPARTITION_PHYSICAL;
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//
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// A Virtual partition is a remapping from VSN to LSN on a given Physical
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// partition. The remapping is done through the VAT FCB.
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//
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typedef struct _PARTITION_VIRTUAL{
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//
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// The maximum Vbn in the virtual partition.
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//
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ULONG Length;
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//
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// A virtual partition refers to its "host" physical partition by partition
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// number, which we translate to a partition reference during the second pass
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// of partition discovery.
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//
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// Example: if the virtual partition is reference 1, hosted on partition 156
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// (which is reference 0 for this logical volume), then NSRLBA 100/1 would
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// refer to the block on partition ref 0 as mapped in the VAT at entry 100.
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//
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USHORT RelatedReference;
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} PARTITION_VIRTUAL, *PPARTITION_VIRTUAL;
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//
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// There is exactly one PARTITION per partition. It is responsible for mapping
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// from some form of logical sector to a physical sector.
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//
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typedef struct _PARTITION {
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//
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// This is the type of partition.
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//
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PARTITION_TYPE Type;
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union {
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PARTITION_PHYSICAL Physical;
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PARTITION_VIRTUAL Virtual;
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};
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} PARTITION, *PPARTITION;
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//
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// The Pcb (Partition control block) record corresponds to the partitions
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// which collectively form the mounted volume. Exactly one of these is
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// linked off of the Vcb.
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//
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typedef struct _PCB {
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//
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// The type and size of this record (must be UDFS_NTC_PCB)
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//
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NODE_TYPE_CODE NodeTypeCode;
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NODE_BYTE_SIZE NodeByteSize;
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//
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// This is the number of partitions in the map
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//
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USHORT Partitions;
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//
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// A bitmask of flags.
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//
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USHORT Flags;
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//
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// Sparing Mcb, if this volume has sparing.
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//
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PLARGE_MCB SparingMcb;
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//
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// This is the mapping table. A PCB will be dynamically sized
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// according to the number of partitions forming the volume.
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//
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PARTITION Partition[0];
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} PCB, *PPCB;
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//
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// Indicate what kinds of partitions are contained for quick checks.
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//
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#define PCB_FLAG_PHYSICAL_PARTITION 0x0001
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#define PCB_FLAG_VIRTUAL_PARTITION 0x0002
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#define PCB_FLAG_SPARABLE_PARTITION 0x0004
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//
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// The Vmcb structure is a double mapped structure for mapping
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// between VBNs and LBNs using the MCB structures. The whole structure
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// is also protected by a private mutex. This record must be allocated
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// from non-paged pool.
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//
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//
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// We use an #if to snip out historical code in the Vmcb package that
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// dealt with write issues, leaving it for the future.
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//
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#define VMCB_WRITE_SUPPORT 0
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typedef struct _VMCB {
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//
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// The type and size of this record (must be UDFS_NTC_VMCB)
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//
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NODE_TYPE_CODE NodeTypeCode;
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NODE_BYTE_SIZE NodeByteSize;
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ERESOURCE Resource;
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MCB VbnIndexed; // maps VBNs to LBNs
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MCB LbnIndexed; // maps LBNs to VBNs
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ULONG MaximumLbn;
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ULONG SectorSize;
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} VMCB, *PVMCB;
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#define UDF_INVALID_VSN -1
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//
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// The Vcb (Volume control block) record corresponds to every
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// volume mounted by the file system. They are ordered in a queue off
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// of UdfData.VcbQueue.
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//
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// The Vcb will be in several conditions during its lifespan.
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//
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// NotMounted - Disk is not currently mounted (i.e. removed
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// from system) but cleanup and close operations are
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// supported.
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//
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// MountInProgress - State of the Vcb from the time it is
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// created until it is successfully mounted or the mount
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// fails.
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//
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// Mounted - Volume is currently in the mounted state.
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//
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// Invalid - User has invalidated the volume. Only legal operations
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// are cleanup and close.
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//
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// DismountInProgress - We have begun the process of tearing down the
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// Vcb. It can be deleted when all the references to it
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// have gone away.
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//
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typedef enum _VCB_CONDITION {
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VcbNotMounted = 0,
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VcbMountInProgress,
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VcbMounted,
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VcbInvalid,
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VcbDismountInProgress
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} VCB_CONDITION;
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typedef struct _VCB {
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//
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// The type and size of this record (must be UDFS_NTC_VCB)
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//
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NODE_TYPE_CODE NodeTypeCode;
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NODE_BYTE_SIZE NodeByteSize;
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//
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// Vpb for this volume.
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//
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PVPB Vpb;
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//
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// Pcb for this volume.
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//
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PPCB Pcb;
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//
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// Device object for the driver below us.
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//
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PDEVICE_OBJECT TargetDeviceObject;
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//
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// Link into queue of Vcb's in the UdfData structure. We will create a union with
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// a LONGLONG to force the Vcb to be quad-aligned.
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//
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union {
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LIST_ENTRY VcbLinks;
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LONGLONG Alignment;
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};
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//
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// State flags and condition for the Vcb.
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//
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ULONG VcbState;
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VCB_CONDITION VcbCondition;
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//
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// File object used to lock the volume.
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//
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PFILE_OBJECT VolumeLockFileObject;
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//
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// Media change count from device driver for bulletproof detection
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// of media movement
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//
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ULONG MediaChangeCount;
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//
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// Logical block size for this volume.
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//
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ULONG SectorSize;
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//
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// Associated shift size
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//
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ULONG SectorShift;
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//
|
|
// LSN of the bounds that CD-UDF defines.
|
|
//
|
|
// S - start of the session that contains the AVD @ +256
|
|
// N - end of the disc, another chance to find AVD @ -256,
|
|
// and discovery of the VAT ICB.
|
|
//
|
|
// N may be unset until late in the mount sequence for a volume, since
|
|
// the device may not respond to CD-style TOC requests, and only then
|
|
// be a guess based on the partitons we find. S will be zero except in
|
|
// the case of CD-UDF. In a mounted system, S will correspond to where
|
|
// we started finding the volume descriptors that let us proceed.
|
|
//
|
|
|
|
ULONG BoundS;
|
|
ULONG BoundN;
|
|
|
|
//
|
|
// Various counts for this Vcb.
|
|
//
|
|
// VcbCleanup - Open handles left on this system.
|
|
// VcbReference - Number of reasons this Vcb is still present.
|
|
// VcbUserReference - Number of user file objects still present.
|
|
//
|
|
|
|
ULONG VcbCleanup;
|
|
ULONG VcbReference;
|
|
ULONG VcbUserReference;
|
|
|
|
//
|
|
// These are the number of times a mounted Vcb will be referenced on behalf
|
|
// of the system. See commentary in udfdata.h.
|
|
//
|
|
|
|
ULONG VcbResidualReference;
|
|
ULONG VcbResidualUserReference;
|
|
|
|
//
|
|
// Fcb for the Volume Dasd file, root directory and the Vmcb-mapped Metadata stream.
|
|
// The VAT Fcb is only created on CD UDF media, for the Virtual Allocation Table.
|
|
//
|
|
|
|
struct _FCB *VolumeDasdFcb;
|
|
struct _FCB *RootIndexFcb;
|
|
struct _FCB *MetadataFcb;
|
|
struct _FCB *VatFcb;
|
|
|
|
//
|
|
// Offset from the beginning of the VAT stream to the first entry (UDF 2.0x has a header
|
|
// at the beginning of the VAT), and number of entries in the VAT.
|
|
//
|
|
|
|
ULONG OffsetToFirstVATEntry;
|
|
ULONG VATEntryCount;
|
|
|
|
//
|
|
// Vmcb for the metadata stream
|
|
//
|
|
|
|
VMCB Vmcb;
|
|
|
|
//
|
|
// Vmcb resource. This is used to synchronize mapping/purge operations on
|
|
// the vmcb stream. Must be acquired shared around any map/unpin or ccread
|
|
// on the vmcb, and exclusive for ccpurge. All mappings made in the current
|
|
// thread must be dropped before attempting to acquire exclusive.
|
|
//
|
|
|
|
ERESOURCE VmcbMappingResource;
|
|
|
|
//
|
|
// Vcb resource. This is used to synchronize open/cleanup/close operations.
|
|
//
|
|
|
|
ERESOURCE VcbResource;
|
|
|
|
//
|
|
// File resource. This is used to synchronize all file operations except
|
|
// open/cleanup/close.
|
|
//
|
|
|
|
ERESOURCE FileResource;
|
|
|
|
//
|
|
// Vcb fast mutex. This is used to synchronize the fields in the Vcb
|
|
// when modified when the Vcb is not held exclusively. Included here
|
|
// are the count fields and Fcb table.
|
|
//
|
|
// We also use this to synchronize changes to the Fcb reference field.
|
|
//
|
|
|
|
FAST_MUTEX VcbMutex;
|
|
PVOID VcbLockThread;
|
|
|
|
//
|
|
// The following is used to synchronize the dir notify package.
|
|
//
|
|
|
|
PNOTIFY_SYNC NotifySync;
|
|
|
|
//
|
|
// The following is the head of a list of notify Irps.
|
|
//
|
|
|
|
LIST_ENTRY DirNotifyList;
|
|
|
|
//
|
|
// Fcb table. Synchronized with the Vcb fast mutex.
|
|
//
|
|
|
|
RTL_GENERIC_TABLE FcbTable;
|
|
|
|
//
|
|
// Preallocated VPB for swapout, so we are not forced to consider
|
|
// must succeed pool.
|
|
//
|
|
|
|
PVPB SwapVpb;
|
|
|
|
//
|
|
// Information telling us what version of UDF we expect this disc to
|
|
// conform to. NsrVersion will be one of VsdIdentNSR02 or VsdIdentNSR03
|
|
// UdfXXXRead will be one of UDF_VERSION_XXX.
|
|
//
|
|
|
|
USHORT NsrVersion;
|
|
USHORT UdfRevision;
|
|
|
|
} VCB, *PVCB;
|
|
|
|
#define VCB_STATE_LOCKED (0x00000001)
|
|
#define VCB_STATE_REMOVABLE_MEDIA (0x00000002)
|
|
#define VCB_STATE_NOTIFY_REMOUNT (0x00000004)
|
|
#define VCB_STATE_METHOD_2_FIXUP (0x00000008)
|
|
#define VCB_STATE_VMCB_INIT (0x00000010)
|
|
#define VCB_STATE_VPB_NOT_ON_DEVICE (0x00000020)
|
|
|
|
//
|
|
// The Volume Device Object is an I/O system device object with a
|
|
// workqueue and an VCB record appended to the end. There are multiple
|
|
// of these records, one for every mounted volume, and are created during
|
|
// a volume mount operation. The work queue is for handling an overload
|
|
// of work requests to the volume.
|
|
//
|
|
|
|
typedef struct _VOLUME_DEVICE_OBJECT {
|
|
|
|
DEVICE_OBJECT DeviceObject;
|
|
|
|
//
|
|
// The following field tells how many requests for this volume have
|
|
// either been enqueued to ExWorker threads or are currently being
|
|
// serviced by ExWorker threads. If the number goes above
|
|
// a certain threshold, put the request on the overflow queue to be
|
|
// executed later.
|
|
//
|
|
|
|
ULONG PostedRequestCount;
|
|
|
|
//
|
|
// The following field indicates the number of IRP's waiting
|
|
// to be serviced in the overflow queue.
|
|
//
|
|
|
|
ULONG OverflowQueueCount;
|
|
|
|
//
|
|
// The following field contains the queue header of the overflow queue.
|
|
// The Overflow queue is a list of IRP's linked via the IRP's ListEntry
|
|
// field.
|
|
//
|
|
|
|
LIST_ENTRY OverflowQueue;
|
|
|
|
//
|
|
// The following spinlock protects access to all the above fields.
|
|
//
|
|
|
|
KSPIN_LOCK OverflowQueueSpinLock;
|
|
|
|
//
|
|
// This is the file system specific volume control block.
|
|
//
|
|
|
|
VCB Vcb;
|
|
|
|
} VOLUME_DEVICE_OBJECT, *PVOLUME_DEVICE_OBJECT;
|
|
|
|
|
|
//
|
|
// Udfs file id is a large integer. This corresponds to the FileInternalInformation
|
|
// query type and is used for internal FCB indexing.
|
|
//
|
|
|
|
typedef LARGE_INTEGER FILE_ID, *PFILE_ID;
|
|
|
|
|
|
//
|
|
// Lcb (Link Control Block), which corresponds to a link from a directory (or in
|
|
// the future, other container objects) to a file (UDF File Identifier). There is
|
|
// one of these for each name tuple in a prefix table.
|
|
//
|
|
|
|
typedef struct _LCB {
|
|
|
|
//
|
|
// Type and size of this record (must be UDFS_NTC_LCB)
|
|
//
|
|
|
|
NODE_TYPE_CODE NodeTypeCode;
|
|
NODE_BYTE_SIZE NodeByteSize;
|
|
|
|
//
|
|
// Pointer to the Parent Fcb for this entry and queue for Parent to
|
|
// find all referencing Lcbs. Corresponds to Fcb->ChildLcbQueue.
|
|
//
|
|
|
|
LIST_ENTRY ParentFcbLinks;
|
|
struct _FCB *ParentFcb;
|
|
|
|
//
|
|
// Pointer to Child (referenced) Fcb for this entry and queue for Child
|
|
// to find all referencing Lcbs. Corresponds to Fcb->ParentLcbQueue.
|
|
//
|
|
|
|
LIST_ENTRY ChildFcbLinks;
|
|
struct _FCB *ChildFcb;
|
|
|
|
//
|
|
// Number of extra realtime references made to this Lcb.
|
|
//
|
|
|
|
ULONG Reference;
|
|
|
|
//
|
|
// Flags indicating the state of this Lcb.
|
|
//
|
|
|
|
ULONG Flags;
|
|
|
|
//
|
|
// File attributes to be merged with the child Fcb. UDF seperates interesting
|
|
// information into the FID and FE so, properly, the name link (corresponding to
|
|
// a FID) must record some extra information.
|
|
//
|
|
|
|
ULONG FileAttributes;
|
|
|
|
//
|
|
// Splay links in the prefix tree.
|
|
//
|
|
|
|
RTL_SPLAY_LINKS Links;
|
|
|
|
//
|
|
// The name of this link.
|
|
//
|
|
|
|
UNICODE_STRING FileName;
|
|
|
|
} LCB, *PLCB;
|
|
|
|
#define LCB_FLAG_IGNORE_CASE 0x00000001
|
|
#define LCB_FLAG_SHORT_NAME 0x00000002
|
|
#define LCB_FLAG_POOL_ALLOCATED 0x00000004
|
|
|
|
//
|
|
// We build a lookaside of Lcb capable of holding a reasonably sized name.
|
|
//
|
|
|
|
#define SIZEOF_LOOKASIDE_LCB ( sizeof( LCB ) + ( sizeof( WCHAR ) * 16 ))
|
|
|
|
|
|
//
|
|
// The following two structures are the separate union structures for
|
|
// data and index Fcb's.
|
|
//
|
|
|
|
typedef enum _FCB_CONDITION {
|
|
FcbGood = 1,
|
|
FcbBad,
|
|
FcbNeedsToBeVerified
|
|
} FCB_CONDITION;
|
|
|
|
typedef struct _FCB_NONPAGED {
|
|
|
|
//
|
|
// Type and size of this record must be UDFS_NTC_FCB_NONPAGED
|
|
//
|
|
|
|
NODE_TYPE_CODE NodeTypeCode;
|
|
NODE_BYTE_SIZE NodeByteSize;
|
|
|
|
//
|
|
// The following field contains a record of special pointers used by
|
|
// MM and Cache to manipluate section objects. Note that the values
|
|
// are set outside of the file system. However the file system on an
|
|
// open/create will set the file object's SectionObject field to
|
|
// point to this field
|
|
//
|
|
|
|
SECTION_OBJECT_POINTERS SegmentObject;
|
|
|
|
//
|
|
// This is the resource structure for this Fcb.
|
|
//
|
|
|
|
ERESOURCE FcbResource;
|
|
|
|
//
|
|
// This is the FastMutex for this Fcb.
|
|
//
|
|
|
|
FAST_MUTEX FcbMutex;
|
|
|
|
//
|
|
// This is the mutex that is inserted into the FCB_ADVANCED_HEADER
|
|
// FastMutex field
|
|
//
|
|
|
|
FAST_MUTEX AdvancedFcbHeaderMutex;
|
|
|
|
} FCB_NONPAGED;
|
|
typedef FCB_NONPAGED *PFCB_NONPAGED;
|
|
|
|
typedef struct _FCB_DATA {
|
|
|
|
//
|
|
// The following field is used by the oplock module
|
|
// to maintain current oplock information.
|
|
//
|
|
|
|
OPLOCK Oplock;
|
|
|
|
//
|
|
// The following field is used by the filelock module
|
|
// to maintain current byte range locking information.
|
|
// A file lock is allocated as needed.
|
|
//
|
|
|
|
PFILE_LOCK FileLock;
|
|
|
|
} FCB_DATA, *PFCB_DATA;
|
|
|
|
typedef struct _FCB_INDEX {
|
|
|
|
//
|
|
// Internal stream file for the directory.
|
|
//
|
|
|
|
PFILE_OBJECT FileObject;
|
|
|
|
//
|
|
// Root of splay trees for exact and ignore case prefix trees.
|
|
//
|
|
|
|
PRTL_SPLAY_LINKS ExactCaseRoot;
|
|
PRTL_SPLAY_LINKS IgnoreCaseRoot;
|
|
|
|
} FCB_INDEX, *PFCB_INDEX;
|
|
|
|
//
|
|
// The Fcb/Dcb record corresponds to every open file and directory, and to
|
|
// every directory on an opened path.
|
|
//
|
|
|
|
typedef struct _FCB_CORE {
|
|
|
|
//
|
|
// The following field is used for fast I/O. It contains the node
|
|
// type code and size, indicates if fast I/O is possible, contains
|
|
// allocation, file, and valid data size, a resource, and call back
|
|
// pointers for FastIoRead and FastMdlRead.
|
|
//
|
|
//
|
|
// Node type codes for the Fcb must be one of the following.
|
|
//
|
|
// UDFS_NTC_FCB_INDEX
|
|
// UDFS_NTC_FCB_DATA
|
|
//
|
|
|
|
//
|
|
// Common Fsrtl Header. The named header is for the fieldoff.c output. We
|
|
// use the unnamed header internally.
|
|
//
|
|
|
|
union {
|
|
|
|
FSRTL_ADVANCED_FCB_HEADER Header;
|
|
FSRTL_ADVANCED_FCB_HEADER;
|
|
};
|
|
|
|
//
|
|
// Vcb for this Fcb.
|
|
//
|
|
|
|
PVCB Vcb;
|
|
|
|
//
|
|
// Queues of Lcbs that are on this Fcb: Parent - edges that lead in
|
|
// Child - edges that lead out
|
|
//
|
|
// We anticipate supporting the streaming extension to UDF 2.0, so we
|
|
// leave the ChildLcbQueue here which in the case of a stream-rich file
|
|
// will contain a solitary Lcb leading to the stream directory.
|
|
//
|
|
|
|
LIST_ENTRY ParentLcbQueue;
|
|
LIST_ENTRY ChildLcbQueue;
|
|
|
|
//
|
|
// Length of Root ICB Extent for this object. Coupled with the information
|
|
// in the FileId, this will allow discovery of the active File Entry for this
|
|
// Fcb at any time.
|
|
//
|
|
|
|
ULONG RootExtentLength;
|
|
|
|
//
|
|
// FileId for this file.
|
|
//
|
|
|
|
FILE_ID FileId;
|
|
|
|
//
|
|
// Counts on this Fcb. Cleanup count represents the number of open handles
|
|
// on this Fcb. Reference count represents the number of reasons this Fcb
|
|
// is still present. It includes file objects, children Fcb and anyone
|
|
// who wants to prevent this Fcb from going away. Cleanup count is synchronized
|
|
// with the FcbResource. The reference count is synchronized with the
|
|
// VcbMutex.
|
|
//
|
|
|
|
ULONG FcbCleanup;
|
|
ULONG FcbReference;
|
|
ULONG FcbUserReference;
|
|
|
|
//
|
|
// State flags for this Fcb.
|
|
//
|
|
|
|
ULONG FcbState;
|
|
|
|
//
|
|
// NT style attributes for the Fcb.
|
|
//
|
|
|
|
ULONG FileAttributes;
|
|
|
|
//
|
|
// This is the thread and count for the thread which has locked this
|
|
// Fcb.
|
|
//
|
|
|
|
PVOID FcbLockThread;
|
|
ULONG FcbLockCount;
|
|
|
|
//
|
|
// Information for Lsn->Psn mapping. If the file data is embedded, we have a
|
|
// lookup into the metadata stream for the single logical block and an offset
|
|
// of the data within that block. If the file data is is external, we have a
|
|
// regular Mapping Control Block.
|
|
//
|
|
// Metadata structures are mapped through the volume-level Metadata Fcb which
|
|
// uses the volume's VMCB.
|
|
//
|
|
|
|
union {
|
|
|
|
LARGE_MCB Mcb;
|
|
|
|
struct EMBEDDED_MAPPING {
|
|
|
|
ULONG EmbeddedVsn;
|
|
ULONG EmbeddedOffset;
|
|
};
|
|
};
|
|
|
|
//
|
|
// This is the nonpaged data for the Fcb
|
|
//
|
|
|
|
PFCB_NONPAGED FcbNonpaged;
|
|
|
|
//
|
|
// Share access structure.
|
|
//
|
|
|
|
SHARE_ACCESS ShareAccess;
|
|
|
|
//
|
|
// We cache a few fields from the FE so that various operations do not have to
|
|
// hit the disk (query, etc.).
|
|
//
|
|
|
|
//
|
|
// Time stamps for this file.
|
|
//
|
|
|
|
TIMESTAMP_BUNDLE Timestamps;
|
|
|
|
//
|
|
// Link count on this file.
|
|
//
|
|
|
|
USHORT LinkCount;
|
|
|
|
//
|
|
// Icb.Icbtag.Filetype
|
|
//
|
|
|
|
UCHAR UdfIcbFileType;
|
|
} FCB_CORE, *PFCB_CORE;
|
|
|
|
|
|
//
|
|
// Split the Fcb into Core / Type specific structures, for the benefit of debugger
|
|
// extensions. which try and read the largest possible size of a union...
|
|
//
|
|
|
|
typedef struct _FCB {
|
|
|
|
FCB_CORE;
|
|
|
|
union {
|
|
|
|
ULONG FcbType;
|
|
FCB_INDEX;
|
|
FCB_DATA;
|
|
};
|
|
|
|
} FCB, *PFCB;
|
|
|
|
|
|
#define FCB_STATE_INITIALIZED (0x00000001)
|
|
#define FCB_STATE_IN_FCB_TABLE (0x00000002)
|
|
#define FCB_STATE_VMCB_MAPPING (0x00000004)
|
|
#define FCB_STATE_EMBEDDED_DATA (0x00000008)
|
|
#define FCB_STATE_MCB_INITIALIZED (0x00000010)
|
|
#define FCB_STATE_ALLOW_ONEGIG_WORKAROUND (0x00000020)
|
|
|
|
#define SIZEOF_FCB_DATA \
|
|
(FIELD_OFFSET( FCB, FcbType ) + sizeof( FCB_DATA ))
|
|
|
|
#define SIZEOF_FCB_INDEX \
|
|
(FIELD_OFFSET( FCB, FcbType ) + sizeof( FCB_INDEX ))
|
|
|
|
|
|
//
|
|
// The Ccb record is allocated for every user file object
|
|
//
|
|
|
|
typedef struct _CCB {
|
|
|
|
//
|
|
// Type and size of this record (must be UDFS_NTC_CCB)
|
|
//
|
|
|
|
NODE_TYPE_CODE NodeTypeCode;
|
|
NODE_BYTE_SIZE NodeByteSize;
|
|
|
|
//
|
|
// Flags. Indicates flags to apply for the current open.
|
|
//
|
|
|
|
ULONG Flags;
|
|
|
|
//
|
|
// Fcb for the file being opened.
|
|
//
|
|
|
|
PFCB Fcb;
|
|
|
|
//
|
|
// Lcb for the file being opened.
|
|
//
|
|
|
|
PLCB Lcb;
|
|
|
|
//
|
|
// We store state information in the Ccb for a directory
|
|
// enumeration on this handle.
|
|
//
|
|
|
|
//
|
|
// Offset in the virtual directory stream to base the next enumeration.
|
|
//
|
|
// A small number (in fact, possibly one) of file indices are reserved for
|
|
// synthesized directory entries (like '.'). Past that point, CurrentFileIndex -
|
|
// UDF_MAX_SYNTHESIZED_FILEINDEX is a byte offset in the stream.
|
|
//
|
|
|
|
LONGLONG CurrentFileIndex;
|
|
UNICODE_STRING SearchExpression;
|
|
|
|
//
|
|
// Highest ULONG-representable FileIndex so far found in the directory stream.
|
|
// This corresponds to the highest FileIndex returnable in a query structure.
|
|
//
|
|
|
|
ULONG HighestReturnableFileIndex;
|
|
|
|
} CCB, *PCCB;
|
|
|
|
#define CCB_FLAG_OPEN_BY_ID (0x00000001)
|
|
#define CCB_FLAG_OPEN_RELATIVE_BY_ID (0x00000002)
|
|
#define CCB_FLAG_IGNORE_CASE (0x00000004)
|
|
#define CCB_FLAG_DISMOUNT_ON_CLOSE (0x00000008)
|
|
#define CCB_FLAG_ALLOW_EXTENDED_DASD_IO (0x00000010)
|
|
|
|
//
|
|
// Following flags refer to index enumeration.
|
|
//
|
|
|
|
#define CCB_FLAG_ENUM_NAME_EXP_HAS_WILD (0x00010000)
|
|
#define CCB_FLAG_ENUM_MATCH_ALL (0x00020000)
|
|
#define CCB_FLAG_ENUM_RETURN_NEXT (0x00040000)
|
|
#define CCB_FLAG_ENUM_INITIALIZED (0x00080000)
|
|
#define CCB_FLAG_ENUM_NOMATCH_CONSTANT_ENTRY (0x00100000)
|
|
|
|
//
|
|
// The Irp Context record is allocated for every orginating Irp. It is
|
|
// created by the Fsd dispatch routines, and deallocated by the UdfComplete
|
|
// request routine
|
|
//
|
|
|
|
typedef struct _IRP_CONTEXT {
|
|
|
|
//
|
|
// Type and size of this record (must be UDFS_NTC_IRP_CONTEXT)
|
|
//
|
|
|
|
NODE_TYPE_CODE NodeTypeCode;
|
|
NODE_BYTE_SIZE NodeByteSize;
|
|
|
|
//
|
|
// Originating Irp for the request.
|
|
//
|
|
|
|
PIRP Irp;
|
|
|
|
//
|
|
// Vcb for this operation. When this is NULL it means we were called
|
|
// with our filesystem device object instead of a volume device object.
|
|
// (Mount will fill this in once the Vcb is created)
|
|
//
|
|
|
|
PVCB Vcb;
|
|
|
|
//
|
|
// Exception encountered during the request. Any error raised explicitly by
|
|
// the file system will be stored here. Any other error raised by the system
|
|
// is stored here after normalizing it.
|
|
//
|
|
|
|
NTSTATUS ExceptionStatus;
|
|
|
|
//
|
|
// Flags for this request.
|
|
//
|
|
|
|
ULONG Flags;
|
|
|
|
//
|
|
// Real device object. This represents the physical device closest to the media.
|
|
//
|
|
|
|
PDEVICE_OBJECT RealDevice;
|
|
|
|
//
|
|
// Io context for a read request.
|
|
// Address of Fcb for teardown oplock in create case.
|
|
//
|
|
|
|
union {
|
|
|
|
struct _UDF_IO_CONTEXT *IoContext;
|
|
PFCB *TeardownFcb;
|
|
};
|
|
|
|
//
|
|
// Top level irp context for this thread.
|
|
//
|
|
|
|
struct _IRP_CONTEXT *TopLevel;
|
|
|
|
//
|
|
// Major and minor function codes.
|
|
//
|
|
|
|
UCHAR MajorFunction;
|
|
UCHAR MinorFunction;
|
|
|
|
//
|
|
// Pointer to the top-level context if this IrpContext is responsible
|
|
// for cleaning it up.
|
|
//
|
|
|
|
struct _THREAD_CONTEXT *ThreadContext;
|
|
|
|
//
|
|
// This structure is used for posting to the Ex worker threads.
|
|
//
|
|
|
|
WORK_QUEUE_ITEM WorkQueueItem;
|
|
|
|
} IRP_CONTEXT, *PIRP_CONTEXT;
|
|
|
|
#define IRP_CONTEXT_FLAG_ON_STACK (0x00000001)
|
|
#define IRP_CONTEXT_FLAG_MORE_PROCESSING (0x00000002)
|
|
#define IRP_CONTEXT_FLAG_WAIT (0x00000004)
|
|
#define IRP_CONTEXT_FLAG_FORCE_POST (0x00000008)
|
|
#define IRP_CONTEXT_FLAG_TOP_LEVEL (0x00000010)
|
|
#define IRP_CONTEXT_FLAG_TOP_LEVEL_UDFS (0x00000020)
|
|
#define IRP_CONTEXT_FLAG_IN_FSP (0x00000040)
|
|
#define IRP_CONTEXT_FLAG_IN_TEARDOWN (0x00000080)
|
|
#define IRP_CONTEXT_FLAG_ALLOC_IO (0x00000100)
|
|
#define IRP_CONTEXT_FLAG_DISABLE_POPUPS (0x00000200)
|
|
#define IRP_CONTEXT_FLAG_FORCE_VERIFY (0x00000400)
|
|
|
|
//
|
|
// Flags used for create.
|
|
//
|
|
|
|
#define IRP_CONTEXT_FLAG_FULL_NAME (0x10000000)
|
|
#define IRP_CONTEXT_FLAG_TRAIL_BACKSLASH (0x20000000)
|
|
|
|
//
|
|
// The following flags need to be cleared when a request is posted.
|
|
//
|
|
|
|
#define IRP_CONTEXT_FLAGS_CLEAR_ON_POST ( \
|
|
IRP_CONTEXT_FLAG_MORE_PROCESSING | \
|
|
IRP_CONTEXT_FLAG_WAIT | \
|
|
IRP_CONTEXT_FLAG_FORCE_POST | \
|
|
IRP_CONTEXT_FLAG_TOP_LEVEL | \
|
|
IRP_CONTEXT_FLAG_TOP_LEVEL_UDFS | \
|
|
IRP_CONTEXT_FLAG_IN_FSP | \
|
|
IRP_CONTEXT_FLAG_IN_TEARDOWN | \
|
|
IRP_CONTEXT_FLAG_DISABLE_POPUPS \
|
|
)
|
|
|
|
//
|
|
// The following flags need to be cleared when a request is retried.
|
|
//
|
|
|
|
#define IRP_CONTEXT_FLAGS_CLEAR_ON_RETRY ( \
|
|
IRP_CONTEXT_FLAG_MORE_PROCESSING | \
|
|
IRP_CONTEXT_FLAG_IN_TEARDOWN | \
|
|
IRP_CONTEXT_FLAG_DISABLE_POPUPS \
|
|
)
|
|
|
|
//
|
|
// The following flags are set each time through the Fsp loop.
|
|
//
|
|
|
|
#define IRP_CONTEXT_FSP_FLAGS ( \
|
|
IRP_CONTEXT_FLAG_WAIT | \
|
|
IRP_CONTEXT_FLAG_TOP_LEVEL | \
|
|
IRP_CONTEXT_FLAG_TOP_LEVEL_UDFS | \
|
|
IRP_CONTEXT_FLAG_IN_FSP \
|
|
)
|
|
|
|
|
|
//
|
|
// Following structure is used to queue a request to the delayed close queue.
|
|
// This structure should be the minimum block allocation size.
|
|
//
|
|
|
|
typedef struct _IRP_CONTEXT_LITE {
|
|
|
|
//
|
|
// Type and size of this record (must be UDFS_NTC_IRP_CONTEXT_LITE)
|
|
//
|
|
|
|
NODE_TYPE_CODE NodeTypeCode;
|
|
NODE_BYTE_SIZE NodeByteSize;
|
|
|
|
//
|
|
// Fcb for the file object being closed.
|
|
//
|
|
|
|
PFCB Fcb;
|
|
|
|
//
|
|
// List entry to attach to delayed close queue.
|
|
//
|
|
|
|
LIST_ENTRY DelayedCloseLinks;
|
|
|
|
//
|
|
// User reference count for the file object being closed.
|
|
//
|
|
|
|
ULONG UserReference;
|
|
|
|
//
|
|
// Real device object. This represents the physical device closest to the media.
|
|
//
|
|
|
|
PDEVICE_OBJECT RealDevice;
|
|
|
|
} IRP_CONTEXT_LITE, *PIRP_CONTEXT_LITE;
|
|
|
|
|
|
//
|
|
// Context structure for asynchronous I/O calls. Most of these fields
|
|
// are actually only required for the ReadMultiple routines, but
|
|
// the caller must allocate one as a local variable anyway before knowing
|
|
// whether there are multiple requests are not. Therefore, a single
|
|
// structure is used for simplicity.
|
|
//
|
|
|
|
typedef struct _UDF_IO_CONTEXT {
|
|
|
|
//
|
|
// These two fields are used for multiple run Io
|
|
//
|
|
|
|
LONG IrpCount;
|
|
PIRP MasterIrp;
|
|
NTSTATUS Status;
|
|
BOOLEAN AllocatedContext;
|
|
|
|
union {
|
|
|
|
//
|
|
// This element handles the asynchronous non-cached Io
|
|
//
|
|
|
|
struct {
|
|
|
|
PERESOURCE Resource;
|
|
ERESOURCE_THREAD ResourceThreadId;
|
|
ULONG RequestedByteCount;
|
|
};
|
|
|
|
//
|
|
// and this element handles the synchronous non-cached Io.
|
|
//
|
|
|
|
KEVENT SyncEvent;
|
|
};
|
|
|
|
} UDF_IO_CONTEXT, *PUDF_IO_CONTEXT;
|
|
|
|
|
|
//
|
|
// Following structure is used to track the top level request. Each Udfs
|
|
// Fsd and Fsp entry point will examine the top level irp location in the
|
|
// thread local storage to determine if this request is top level and/or
|
|
// top level Udfs. The top level Udfs request will remember the previous
|
|
// value and update that location with a stack location. This location
|
|
// can be accessed by recursive Udfs entry points.
|
|
//
|
|
|
|
typedef struct _THREAD_CONTEXT {
|
|
|
|
//
|
|
// UDFS signature. Used to confirm structure on stack is valid.
|
|
//
|
|
|
|
ULONG Udfs;
|
|
|
|
//
|
|
// Previous value in top-level thread location. We restore this
|
|
// when done.
|
|
//
|
|
|
|
PIRP SavedTopLevelIrp;
|
|
|
|
//
|
|
// Top level Udfs IrpContext. Initial Udfs entry point on stack
|
|
// will store the IrpContext for the request in this stack location.
|
|
//
|
|
|
|
PIRP_CONTEXT TopLevelIrpContext;
|
|
|
|
} THREAD_CONTEXT, *PTHREAD_CONTEXT;
|
|
|
|
|
|
//
|
|
// Following structure is used to build up static data for parse tables
|
|
//
|
|
|
|
typedef struct _PARSE_KEYVALUE {
|
|
PCHAR Key;
|
|
ULONG Value;
|
|
} PARSE_KEYVALUE, *PPARSE_KEYVALUE;
|
|
|
|
|
|
//
|
|
// Some macros for supporting the use of a Generic Table
|
|
// containing all the FCB and indexed by their FileId.
|
|
//
|
|
// The ISO 13346 lb_addr of the ICB hierarchy of the object
|
|
//
|
|
// { ULONG BlockNo; USHORT PartitionId }
|
|
//
|
|
// is encoded in the LowPart (BlockNo) and low 16 bits of the
|
|
// HighPart (PartitionId). The top 16 bits are reserved and are
|
|
// currently used to indicate the type of the object being referenced
|
|
// (file or directory).
|
|
//
|
|
// NOTE: this FileId prevents us from being able crack the name of
|
|
// object since an ICB hierarchy's contained direct File Entrys do
|
|
// not (and cannot) contain backpointers to the containing directory.
|
|
// In order to be able to crack paths, we need to be able to do a
|
|
// directory/dirent offset, which cannot fit in 64bits of FileId.
|
|
// A FileId must be 64bits since we export this in the FileInternalInforation
|
|
// query.
|
|
//
|
|
// Also, even through we are restricted to a single partition in this
|
|
// implementation, getting those "spare" 16bits isn't good enough to let us
|
|
// point directly into a directory's File Identifier. Files and by extension
|
|
// directories can exceed 2^32 bytes/entries. Once we have pointed at the
|
|
// parent dir, we are out of bits.
|
|
//
|
|
// The Id field is a LARGE_INTEGER where the High and Low parts can be
|
|
// accessed separately.
|
|
//
|
|
// The following macros are used to access the Fid fields.
|
|
//
|
|
// CdQueryFidDirentOffset - Accesses the Dirent offset field
|
|
// CdQueryFidPathTableNumber - Accesses the PathTable offset field
|
|
// CdSetFidDirentOffset - Sets the Dirent offset field
|
|
// CdSetFidPathTableNumber - Sets the PathTable ordinal field
|
|
// CdFidIsDirectory - Queries if directory bit is set
|
|
// CdFidSetDirectory - Sets directory bit
|
|
//
|
|
|
|
#define FID_DIR_MASK 0x80000000 // high order bit means directory.
|
|
|
|
#define UdfSetFidFromLbAddr(I, LBA) { (I).LowPart = (LBA).Lbn; \
|
|
(I).HighPart = (ULONG) (LBA).Partition; }
|
|
|
|
#define UdfGetFidLbn(I) ((I).LowPart)
|
|
#define UdfGetFidPartition(I) ((USHORT) (((I).HighPart & ~FID_DIR_MASK) & MAXUSHORT))
|
|
#define UdfGetFidReservedZero(I) ((I).HighPart & ~(FID_DIR_MASK|MAXUSHORT))
|
|
|
|
#define UdfSetFidFile(I) ClearFlag( (I).HighPart, FID_DIR_MASK )
|
|
#define UdfSetFidDirectory(I) SetFlag( (I).HighPart, FID_DIR_MASK )
|
|
|
|
#define UdfIsFidFile(I) BooleanFlagOff( (I).HighPart, FID_DIR_MASK )
|
|
#define UdfIsFidDirectory(I) BooleanFlagOn( (I).HighPart, FID_DIR_MASK )
|
|
|
|
#define UdfSetFidFromFidAndFe(I, FID, FE ) { \
|
|
UdfSetFidFromLbAddr((I), (FID)->Icb.Start); \
|
|
if ((FE) && ((FE)->Icbtag.FileType == ICBTAG_FILE_T_DIRECTORY)) { \
|
|
UdfSetFidDirectory((I)); \
|
|
} \
|
|
}
|
|
|
|
|
|
//
|
|
// Context structures for browsing through structures
|
|
//
|
|
|
|
//
|
|
// A mapped view is a useful bundle to hold information about a physical
|
|
// view of the disk.
|
|
//
|
|
|
|
typedef struct _MAPPED_PVIEW {
|
|
|
|
//
|
|
// A mapped extent and CC control block
|
|
//
|
|
|
|
PVOID View;
|
|
PBCB Bcb;
|
|
|
|
//
|
|
// Extent location
|
|
//
|
|
|
|
USHORT Partition;
|
|
ULONG Lbn;
|
|
ULONG Length;
|
|
|
|
//
|
|
// In the case of mappings through the metadata stream, store the Vsn currently
|
|
// mapped to the Lbn
|
|
//
|
|
|
|
ULONG Vsn;
|
|
|
|
} MAPPED_PVIEW, *PMAPPED_PVIEW;
|
|
|
|
|
|
//
|
|
// Enumeration contexts for various operations.
|
|
//
|
|
|
|
//
|
|
// The following is used for crawling ICB hierarchies searching
|
|
// for some notion of an active entry.
|
|
//
|
|
|
|
typedef struct _ICB_SEARCH_CONTEXT {
|
|
|
|
//
|
|
// Vcb the search is occuring on.
|
|
//
|
|
|
|
PVCB Vcb;
|
|
|
|
//
|
|
// Type of Icb being searched for.
|
|
//
|
|
|
|
USHORT IcbType;
|
|
|
|
//
|
|
// The Active is most prevailing ICB so far found.
|
|
//
|
|
|
|
MAPPED_PVIEW Active;
|
|
|
|
//
|
|
// The current logical block extent being read from the disk.
|
|
//
|
|
|
|
MAPPED_PVIEW Current;
|
|
|
|
} ICB_SEARCH_CONTEXT, *PICB_SEARCH_CONTEXT;
|
|
|
|
//
|
|
// The following is used for crawling Extended Attributes extending off of
|
|
// a direct ICB
|
|
//
|
|
|
|
typedef enum _EA_SEARCH_TYPE {
|
|
|
|
EaEnumBad = 0,
|
|
EaEnumISO,
|
|
EaEnumImplementation,
|
|
EaEnumApplication
|
|
|
|
} EA_SEARCH_TYPE, *PEA_SEARCH_TYPE;
|
|
|
|
typedef struct _EA_SEARCH_CONTEXT {
|
|
|
|
//
|
|
// Reference to an elaborated ICB_SEARCH_CONTEXT which gives us a handle
|
|
// onto a direct ICB to crawl.
|
|
//
|
|
|
|
PICB_SEARCH_CONTEXT IcbContext;
|
|
|
|
//
|
|
// The current Ea being looked at.
|
|
//
|
|
|
|
PVOID Ea;
|
|
|
|
//
|
|
// Bytes remaining in the EA view
|
|
//
|
|
|
|
ULONG Remaining;
|
|
|
|
//
|
|
// EA being searched for. We only support looking for ISO at this time.
|
|
//
|
|
|
|
ULONG EAType;
|
|
USHORT EASubType;
|
|
|
|
} EA_SEARCH_CONTEXT, *PEA_SEARCH_CONTEXT;
|
|
|
|
//
|
|
// The following is used to crawl the list of allocation extent descriptors attached
|
|
// to an ICB.
|
|
//
|
|
|
|
typedef struct _ALLOC_ENUM_CONTEXT {
|
|
|
|
//
|
|
// Reference to an elaborated ICB_ENUM_CONTEXT which gives us a handle
|
|
// onto a direct ICB to crawl.
|
|
//
|
|
|
|
PICB_SEARCH_CONTEXT IcbContext;
|
|
|
|
//
|
|
// The current allocation descriptor being looked at.
|
|
//
|
|
|
|
PVOID Alloc;
|
|
|
|
//
|
|
// Type of allocation descriptors in this enumeration
|
|
//
|
|
|
|
ULONG AllocType;
|
|
|
|
//
|
|
// Bytes remaining in this view.
|
|
//
|
|
|
|
ULONG Remaining;
|
|
|
|
} ALLOC_ENUM_CONTEXT, *PALLOC_ENUM_CONTEXT;
|
|
|
|
//
|
|
// The following is used to crawl a logical directory.
|
|
//
|
|
|
|
typedef struct _DIR_ENUM_CONTEXT {
|
|
|
|
//
|
|
// The current view in the enumeration.
|
|
//
|
|
|
|
PVOID View;
|
|
PBCB Bcb;
|
|
|
|
//
|
|
// Offset of the view from the beginning of the directory.
|
|
//
|
|
|
|
LARGE_INTEGER BaseOffset;
|
|
|
|
//
|
|
// Length of the view which is valid and the current
|
|
// offset in it.
|
|
//
|
|
|
|
ULONG ViewLength;
|
|
ULONG ViewOffset;
|
|
|
|
//
|
|
// Pointer to the current FID.
|
|
//
|
|
|
|
PNSR_FID Fid;
|
|
|
|
//
|
|
// Offset to the next fid from the beginning of the view.
|
|
//
|
|
|
|
ULONG NextFidOffset;
|
|
|
|
//
|
|
// Flags indicating the state of the enumeration.
|
|
//
|
|
|
|
ULONG Flags;
|
|
|
|
//
|
|
// Converted names from the FID. Case name is "case appropriate" for
|
|
// the operation.
|
|
//
|
|
|
|
UNICODE_STRING ObjectName;
|
|
UNICODE_STRING CaseObjectName;
|
|
|
|
//
|
|
// Real object name in pure form (not rendered to NT legal form)
|
|
//
|
|
|
|
UNICODE_STRING PureObjectName;
|
|
|
|
//
|
|
// Short name for the object.
|
|
//
|
|
|
|
UNICODE_STRING ShortObjectName;
|
|
|
|
//
|
|
// Currently allocated space for the name. The previous strings are
|
|
// carved out of this single buffer.
|
|
//
|
|
|
|
PVOID NameBuffer;
|
|
|
|
//
|
|
// Size of currently allocated name buffer for the lfn names.
|
|
//
|
|
|
|
USHORT AllocLength;
|
|
|
|
} DIR_ENUM_CONTEXT, *PDIR_ENUM_CONTEXT;
|
|
|
|
//
|
|
// Flags for noting where in the enumeration we are.
|
|
//
|
|
|
|
#define DIR_CONTEXT_FLAG_SEEN_NONCONSTANT 0x0001
|
|
#define DIR_CONTEXT_FLAG_SEEN_PARENT 0x0002
|
|
|
|
//
|
|
// Flag indicating current Fid was buffered into pool.
|
|
//
|
|
|
|
#define DIR_CONTEXT_FLAG_FID_BUFFERED 0x0004
|
|
|
|
#endif // _CDSTRUC_
|