FSD_VOLUME_INFO (Compact 2013)

3/26/2014

This structure is used with the files sytem driver (FSD) function FSD_GetVolumeInfo to report information to the OS. The storage manager uses the data returned by this function in the FSD_VOLUME_INFO structure to report file system information to applications with the CeGetVolumeInfo function.

Syntax

typedef struct _FSD_VOLUME_INFO {
  DWORD cbSize;
  DWORD dwFSVersion; 
  TCHAR szFSDDesc[MAX_FSD_DESCRIPTOR];
  TCHAR szFSDSubType[MAX_FSD_DESCRIPTOR];
  DWORD dwAttributes;
  DWORD dwBlockSize;
  DWORD dwFlags;
} FSD_VOLUME_INFO, *PFSD_VOLUME_INFO;

Members

• cbSize
  Set to sizeof(FSD_VOLUME_INFO).

• dwFSVersion
  Version of the file system to which this FSD conforms.

• szFSDDesc
  Currently ignored. FSD name, such as FAT or UDFS.

• szFSDSubType
  Currently ignored. Subtype of the FSD, if applicable, such as FAT12, FAT16, or FAT32.

• dwAttributes
  Bitmask that contains file system attribute values. The following table shows possible values.

  Value	Description
  FSD_ATTRIBUTE_READONLY	The volume is read only.
  FSD_ATTRIBUTE_XIP	The volume supports execute-in-place (XIP) from the file system.

• dwBlockSize
  Optimal block size for I/O operations. For FAT, this is the cluster size.

• dwFlags
  Information values. The following table shows possible values.

  Flag	Value	Description
  FSD_FLAG_TRANSACTION_SAFE	0x1	The volume supports transaction safe operations. This indicates that the file system meta-data is not corrupted by a power loss.
  FSD_FLAG_TRANSACT_WRITES	0x2	The volume supports transaction-safe WriteFile operations. This indicates that the file system metadata is not corrupted by a power loss.
  FSD_FLAG_WFSC_SUPPORTED	0x4	The FSD supports the MyFSD_WriteFileGather and the MyFSD_ReadFileScatter functions.
  FSD_FLAG_LOCKFILE_SUPPORTED	0x8	The FSD supports the MyFSD_LockFileEx and the MyFSD_UnLockFileEx functions.
  FSD_FLAG_NETWORK	0x10	The FSD is a network file system.
  FSD_FLAG_FILE_CACHE_SUPPORTED	0x200	The FSD supports file cache and cache manager functionality.

Requirements

See Also

Reference

FSD Structures
FSD_GetVolumeInfo