Difference between revisions of "UNIX Extensions"

From SambaWiki
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in the reply to a trans2 qfsinfo (TRANSACT2_QFSINFO 0x03) info level SMB_QUERY_CIFS_UNIX_INFO (0x200) call.
+
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 :
 
For open, call TRANSACT2_SETPATHINFO (0x06) call info level :
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SMB_POSIX_PATH_OPEN 0x209
 
SMB_POSIX_PATH_OPEN 0x209
   
The request data block should be 14 bytes consisting of
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The request data block should be 14 bytes consisting of the following :
the following :
 
   
 
{|
 
{|
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|-
 
|-
 
||2 bytes || 12 || Reply info level requested (see below)
 
||2 bytes || 12 || Reply info level requested (see below)
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|}
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Encodings are as follows :
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  +
{|
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!POSIX open flags !! Value
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|-
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|| SMB_O_RDONLY || 0x1
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|-
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|| SMB_O_WRONLY || 0x2
  +
|-
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|| SMB_O_RDWR || 0x4
  +
|- 
  +
||SMB_O_CREAT || 0x10
  +
|-
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|| SMB_O_EXCL || 0x20
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|-
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|| SMB_O_TRUNC || 0x40
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|-
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|| SMB_O_APPEND || 0x80
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|-
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|| SMB_O_SYNC || 0x100
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|-
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|| SMB_O_DIRECTORY || 0x200
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|-
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|| SMB_O_NOFOLLOW || 0x400
  +
|-
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|| SMB_O_DIRECT || 0x800
 
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Revision as of 22:00, 7 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).

PosixOpen

Server specifies it can serve these by returning :

Capability Value
CIFS_UNIX_POSIX_PATH_OPERATIONS_CAP 0x20

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

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