DFS_INFO_9 structure (lmdfs.h)

Contains the name, status, GUID, time-out, property flags, metadata size, DFS target information, link reparse point security descriptor, and a list of DFS targets for a root or link. This structure is only for use with the NetDfsGetInfo and NetDfsEnum functions.

Syntax

typedef struct _DFS_INFO_9 {
  LPWSTR               EntryPath;
  LPWSTR               Comment;
  DWORD                State;
  ULONG                Timeout;
  GUID                 Guid;
  ULONG                PropertyFlags;
  ULONG                MetadataSize;
  ULONG                SecurityDescriptorLength;
#if ...
  PUCHAR               pSecurityDescriptor;
  ULONG                SdLengthReserved;
#else
  PSECURITY_DESCRIPTOR pSecurityDescriptor;
#endif
  DWORD                NumberOfStorages;
#if ...
  LPDFS_STORAGE_INFO_1 Storage;
#else
  LPDFS_STORAGE_INFO_1 Storage;
#endif
} DFS_INFO_9, *PDFS_INFO_9, *LPDFS_INFO_9;

Members

EntryPath

Pointer to a null-terminated Unicode string that specifies the Universal Naming Convention (UNC) path of a DFS root or link.

For a link, the string can be in one of two forms. The first form is as follows:

\\ServerName\DfsName\link_path

where ServerName is the name of the root target server that hosts the stand-alone DFS namespace; DfsName is the name of the DFS namespace; and link_path is a DFS link.

The second form is as follows:

\\DomainName\DomDfsname\link_path

where DomainName is the name of the domain that hosts the domain-based DFS namespace; DomDfsname is the name of the DFS namespace; and link_path is a DFS link.

For a root, the string can be in one of two forms:

\\ServerName\DfsName

or

\\DomainName\DomDfsname

where the values of the names are the same as those described previously.

Comment

Pointer to a null-terminated Unicode string that contains a comment associated with the DFS root or link.

State

Specifies a set of bit flags that describe the DFS root or link. One DFS_VOLUME_STATE flag is set, and one DFS_VOLUME_FLAVOR flag is set. The DFS_VOLUME_FLAVORS bitmask (0x00000300) must be used to extract the DFS namespace flavor, and the DFS_VOLUME_STATES bitmask (0x0000000F) must be used to extract the DFS root or link state from this member. For an example that describes the interpretation of the flags, see the Remarks section of DFS_INFO_2.

DFS_VOLUME_STATE_OK (0x00000001)

The specified DFS root or link is in the normal state.

DFS_VOLUME_STATE_INCONSISTENT (0x00000002)

The internal DFS database is inconsistent with the specified DFS root or link. Attempts to repair the inconsistency have failed.

DFS_VOLUME_STATE_OFFLINE (0x00000003)

The specified DFS root or link is offline or unavailable.

DFS_VOLUME_STATE_ONLINE (0x00000004)

The specified DFS root or link is available.

DFS_VOLUME_FLAVOR_STANDALONE (0x00000100)

The system sets this flag if the root is associated with a stand-alone DFS namespace.

DFS_VOLUME_FLAVOR_AD_BLOB (0x00000200)

The system sets this flag if the root is associated with a domain-based DFS namespace.

Timeout

Specifies the time-out, in seconds, of the DFS root or link.

Guid

Specifies the GUID of the DFS root or link.

PropertyFlags

Specifies a set of flags that describe specific properties of a DFS namespace, root, or link.

DFS_PROPERTY_FLAG_INSITE_REFERRALS (0x00000001)

Scope: Domain roots, stand-alone roots, and links. If this flag is set at the DFS root, it applies to all links; otherwise, the value of this flag is considered for each individual link.

When this flag is set, a DFS referral response from a DFS server for a DFS root or link with the "INSITE" option enabled contains only those targets which are in the same site as the DFS client requesting the referral. Targets in the two global priority classes are always returned, regardless of their site location.

DFS_PROPERTY_FLAG_ROOT_SCALABILITY (0x00000002)

Scope: The entire DFS namespace for a domain-based DFS namespace only.

By default, a DFS root target server polls the PDS to detect changes to the DFS metadata. To prevent heavy server load on the PDC, root scalability can be enabled for the DFS namespace. Setting this flag will cause the DFS server to poll the nearest domain controller instead of the PDC for DFS metadata changes for the common namespace. Note that any changes made to the metadata must still occur on the PDC, however.

DFS_PROPERTY_FLAG_SITE_COSTING (0x00000004)

Scope: The entire DFS namespace for both domain-based and stand-alone DFS namespaces.

By default, targets returned in a referral response from a DFS server to a DFS client for a DFS root or link consists of two groups: targets in the same site as the client, and targets outside the site.

If site-costing is enabled for the Active Directory, the response can have more than two groups, with each group containing targets with the same site cost for the specific DFS client requesting the referral. The groups are ordered by increasing site cost. For more information about how site-costing is used to prioritize targets, see DFS Server Target Prioritization.

DFS_PROPERTY_FLAG_TARGET_FAILBACK (0x00000008)

Scope: Domain-based DFS roots, stand-alone DFS roots, and DFS links. If this flag is set at the DFS root, it applies to all links; otherwise, the value of this flag is considered for each individual link.

When this flag is set, optimal target failback is enabled for V4 DFS clients, allowing them to fail back to an optimal target after failing over to a non-optimal one. The target failback setting is provided to the DFS client in a V4 referral response by a DFS server.

DFS_PROPERTY_FLAG_CLUSTER_ENABLED (0x00000010)

Scope: Stand-alone DFS roots and links only.

The DFS root is clustered to provide high availability for storage failover. This flag cannot be set using the NetDfsSetInfo function.

DFS_PROPERTY_FLAG_ABDE (0x00000020)

Scope: Domain-based DFS roots and stand-alone DFS roots.

When this flag is set, Access-Based Directory Enumeration (ABDE) mode support is enabled on the entire DFS root target share of the DFS namespace. This flag is valid only for DFS namespaces for which the DFS_NAMESPACE_CAPABILITY_ABDE capability flag is set. For more information, see DFS_INFO_50 and DFS_SUPPORTED_NAMESPACE_VERSION_INFO.

The DFS_PROPERTY_FLAG_ABDE flag is valid only on the DFS namespace root and not on root targets, links, or link targets. This flag must be enabled to associate a security descriptor with a DFS link.

MetadataSize

For domain-based DFS namespaces, this member specifies the size of the corresponding Active Directory data blob, in bytes. For stand-alone DFS namespaces, this field specifies the size of the metadata stored in the registry, including the key names and value names, in addition to the specific data items associated with them.

This field is valid for DFS roots only.

SecurityDescriptorLength

pSecurityDescriptor

Pointer to a SECURITY_DESCRIPTOR structure that specifies a self-relative security descriptor to be associated with the DFS link's reparse point. This field is valid for DFS links only.

SdLengthReserved

This member is reserved for system use.

NumberOfStorages

Specifies the number of targets for the DFS root or link. These targets are contained in the Storage member of this structure.

Storage

Specifies an array of DFS_STORAGE_INFO_1 structures that contain the DFS target information.

Requirements

See also

Distributed File System Functions

NetDfsGetInfo