编辑

CF_UPDATE_FLAGS enumeration (cfapi.h)

  • 项目
  • 2 分钟可看完

Flags for updating a placeholder file or directory.

Syntax

typedef enum CF_UPDATE_FLAGS {
  CF_UPDATE_FLAG_NONE = 0x00000000,
  CF_UPDATE_FLAG_VERIFY_IN_SYNC = 0x00000001,
  CF_UPDATE_FLAG_MARK_IN_SYNC = 0x00000002,
  CF_UPDATE_FLAG_DEHYDRATE = 0x00000004,
  CF_UPDATE_FLAG_ENABLE_ON_DEMAND_POPULATION = 0x00000008,
  CF_UPDATE_FLAG_DISABLE_ON_DEMAND_POPULATION = 0x00000010,
  CF_UPDATE_FLAG_REMOVE_FILE_IDENTITY = 0x00000020,
  CF_UPDATE_FLAG_CLEAR_IN_SYNC = 0x00000040,
  CF_UPDATE_FLAG_REMOVE_PROPERTY = 0x00000080,
  CF_UPDATE_FLAG_PASSTHROUGH_FS_METADATA = 0x00000100,
  CF_UPDATE_FLAG_ALWAYS_FULL,
  CF_UPDATE_FLAG_ALLOW_PARTIAL
} ;

Constants

 
CF_UPDATE_FLAG_NONE
Value: 0x00000000
No update flags.
CF_UPDATE_FLAG_VERIFY_IN_SYNC
Value: 0x00000001
The update will fail if the CF_UPDATE_FLAG_MARK_IN_SYNC attribute is not currently set on the placeholder. This is to prevent a race between syncing changes from the cloud down to a local placeholder and the placeholder’s data stream getting locally modified.
CF_UPDATE_FLAG_MARK_IN_SYNC
Value: 0x00000002
The platform marks the placeholder as in-sync upon a successful update placeholder operation.
CF_UPDATE_FLAG_DEHYDRATE
Value: 0x00000004
Applicable to files only. When specified, the platform dehydrates the file after updating the placeholder successfully. The caller must acquire an exclusive handle when specifying this flag or data corruptions can occur. Note that the platform does not validate the exclusiveness of the handle.
CF_UPDATE_FLAG_ENABLE_ON_DEMAND_POPULATION
Value: 0x00000008
Applicable to directories only. When specified, it marks the updated placeholder directory partially populated such that any future access to it will result in a FETCH_PLACEHOLDERS callback sent to the sync provider.
CF_UPDATE_FLAG_DISABLE_ON_DEMAND_POPULATION
Value: 0x00000010
Applicable to directories only. When specified, it marks the updated placeholder directory fully populated such that any future access to it will be handled by the platform without any callbacks to the sync provider.
CF_UPDATE_FLAG_REMOVE_FILE_IDENTITY
Value: 0x00000020
When specified, FileIdentity and FileIdentityLength in CfUpdatePlaceholder are ignored and the platform will remove the existing file identity blob on the placeholder upon a successful update call.
CF_UPDATE_FLAG_CLEAR_IN_SYNC
Value: 0x00000040
The platform marks the placeholder as not in-sync upon a successful update placeholder operation.
CF_UPDATE_FLAG_REMOVE_PROPERTY
Value: 0x00000080
Note  This value is new for Windows 10, version 1803.

The platform removes all existing extrinsic properties on the placeholder.
CF_UPDATE_FLAG_PASSTHROUGH_FS_METADATA
Value: 0x00000100
Note  This value is new for Windows 10, version 1803.

The platform passes CF_FS_METADATA to the file system without any filtering; otherwise, the platform skips setting any fields whose value is 0.

Requirements

   
Minimum supported client Windows 10, version 1709 [desktop apps only]
Minimum supported server Windows Server 2016 [desktop apps only]
Header cfapi.h