2.2.1.2.1 Extended File Attribute (SMB_EXT_FILE_ATTR) Extensions

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The list of extended file attributes valid in 32-bit attribute values, as specified in [MS-CIFS] section 2.2.1.2.3, has been extended to include the following attributes:

  • ATTR_SPARSE

  • ATTR_REPARSE_POINT

  • ATTR_OFFLINE

  • ATTR_NOT_CONTENT_INDEXED

  • ATTR_ENCRYPTED

The following table lists all possible values. Unless otherwise noted, any combination of these values is acceptable.

Name & bitmask

Extension

Meaning

ATTR_READONLY

0x00000001

No

File is read-only. Applications cannot write or delete the file.

ATTR_HIDDEN

0x00000002

No

File is hidden. It is not to be included in an ordinary directory enumeration.

ATTR_SYSTEM

0x00000004

No

File is part of or is used exclusively by the operating system.

ATTR_DIRECTORY

0x00000010

No

File is a directory.

ATTR_ARCHIVE

0x00000020

No

File has not been archived since it was last modified.

ATTR_NORMAL

0x00000080

No

File has no other attributes set. This value is valid only when used alone.

ATTR_TEMPORARY

0x00000100

No

File is temporary.

ATTR_SPARSE

0x00000200

Yes

File is a sparse file.

ATTR_REPARSE_POINT

0x00000400

Yes

File or directory has an associated reparse point.

ATTR_COMPRESSED

0x00000800

No

File is compressed on the disk. This does not affect how it is transferred over the network.

ATTR_OFFLINE

0x00001000

Yes

File data is not available. The attribute indicates that the file has been moved to offline storage.

ATTR_NOT_CONTENT_INDEXED

0x00002000

Yes

File or directory SHOULD NOT be indexed by a content indexing service.

ATTR_ENCRYPTED

0x00004000

Yes

File or directory is encrypted. For a file, this means that all data in the file is encrypted. For a directory, this means that encryption is the default for newly created files and subdirectories.

Reserved

0xFFFF8048

N/A

SHOULD be set to zero when sending and MUST be ignored upon receipt of the message.