VSS_SUBSCRIBE_MASK enumeration (vswriter.h)
The VSS_SUBSCRIBE_MASK enumeration is used by a writer when subscribing to the VSS service. It indicates the events that the writer is willing to receive.
Syntax
typedef enum VSS_SUBSCRIBE_MASK {
VSS_SM_POST_SNAPSHOT_FLAG = 0x00000001,
VSS_SM_BACKUP_EVENTS_FLAG = 0x00000002,
VSS_SM_RESTORE_EVENTS_FLAG = 0x00000004,
VSS_SM_IO_THROTTLING_FLAG = 0x00000008,
VSS_SM_ALL_FLAGS = 0xffffffff
} ;
Constants
VSS_SM_POST_SNAPSHOT_FLAGValue: 0x00000001 This enumeration value is reserved for future use. Specifies that the writer expects to be notified after the shadow copy it is participating in has completed. It will then call CVssWriter::OnPostSnapshot. |
VSS_SM_BACKUP_EVENTS_FLAGValue: 0x00000002 Currently, VSS_SM_BACKUP_EVENTS_FLAG can be used as an argument only when combined through a bitwise OR with VSS_SM_RESTORE_EVENTS_FLAG. Specifies that the writer can expect to receive the following events:
|
VSS_SM_RESTORE_EVENTS_FLAGValue: 0x00000004 Currently, VSS_SM_RESTORE_EVENTS_FLAG can be used as an argument only when combined through a bitwise OR with VSS_SM_BACKUP_EVENTS_FLAG. Specifies that the writer can expect to receive the following events:
|
VSS_SM_IO_THROTTLING_FLAGValue: 0x00000008 This enumeration value is reserved for future use. |
VSS_SM_ALL_FLAGSValue: 0xffffffff This enumeration value is reserved for future use. Specifies that the writer expects to be notified for all events. |
Remarks
A bit mask (or bitwise OR) of VSS_SUBSCRIBE_MASK values is used as an argument only to CVssWriter::Subscribe.
Currently, the only supported VSS_SUBSCRIBE_MASK bit mask is ( VSS_SM_BACKUP_EVENTS_FLAG | VSS_SM_RESTORE_EVENTS_FLAG).
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Header | vswriter.h |
See also
CVssWriter::OnBackOffIOOnVolume