Difference between revisions of "UNIX Extensions"

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== PosixOpen ==
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== Posix Open ==
  
 
The server specifies it can serve these by returning CIFS_UNIX_POSIX_PATH_OPERATIONS_CAP
 
The server specifies it can serve these by returning CIFS_UNIX_POSIX_PATH_OPERATIONS_CAP

Revision as of 20:17, 27 February 2007

See http://samba.org/samba/CIFS_POSIX_extensions.html

All Unix extensions are TRANSACT2 commands in the range from 0x200 to 0x2FF (inclusive).

Negotiating Capabilities

Capability Value
CIFS_UNIX_FCNLT_LOCKS_CAP 0x01
CIFS_UNIX_POSIX_ACLS_CAP 0x02
CIFS_UNIX_XATTR_CAP 0x04
CIFS_UNIX_EXATTR_CAP 0x08
CIFS_UNIX_POSIX_PATH_OPERATIONS_CAP 0x20

Posix Open

The server specifies it can serve these by returning CIFS_UNIX_POSIX_PATH_OPERATIONS_CAP in the reply to a trans2 qfsinfo (TRANSACT2_QFSINFO 0x03) info level SMB_QUERY_CIFS_UNIX_INFO (0x200) call. All values are little endian.

For open, call TRANSACT2_SETPATHINFO (0x06) call info level :

SMB_POSIX_PATH_OPEN 0x209

The request data block should be 14 bytes consisting of the following :

Size Offset Value
4 bytes 0 Flags field (same as smb_ntcreate_flags in SMBNTCreateX to request oplocks)
4 bytes 4 POSIX open flags (see below)
4 bytes 8 POSIX mode_t (see below)
2 bytes 12 Reply info level requested (see below)

Encodings are as follows :

POSIX open flags Value
SMB_O_RDONLY 0x1
SMB_O_WRONLY 0x2
SMB_O_RDWR 0x4
SMB_O_CREAT 0x10
SMB_O_EXCL 0x20
SMB_O_TRUNC 0x40
SMB_O_APPEND 0x80
SMB_O_SYNC 0x100
SMB_O_DIRECTORY 0x200
SMB_O_NOFOLLOW 0x400
SMB_O_DIRECT 0x800

SMB WHOAMI

UNIX_INFO2