| [860] | 1 | '\" t
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| 2 | .\" Title: vfs_streams_xattr
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| 3 | .\" Author: [see the "AUTHOR" section]
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| [988] | 4 | .\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
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| [989] | 5 | .\" Date: 10/25/2016
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| [860] | 6 | .\" Manual: System Administration tools
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| [988] | 7 | .\" Source: Samba 4.4
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| [860] | 8 | .\" Language: English
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| 9 | .\"
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| [989] | 10 | .TH "VFS_STREAMS_XATTR" "8" "10/25/2016" "Samba 4\&.4" "System Administration tools"
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| [860] | 11 | .\" -----------------------------------------------------------------
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| 12 | .\" * Define some portability stuff
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| 13 | .\" -----------------------------------------------------------------
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| 14 | .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| 15 | .\" http://bugs.debian.org/507673
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| 16 | .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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| 17 | .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| 18 | .ie \n(.g .ds Aq \(aq
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| 19 | .el .ds Aq '
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| 20 | .\" -----------------------------------------------------------------
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| 21 | .\" * set default formatting
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| 22 | .\" -----------------------------------------------------------------
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| 23 | .\" disable hyphenation
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| 24 | .nh
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| 27 | .\" -----------------------------------------------------------------
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| 28 | .\" * MAIN CONTENT STARTS HERE *
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| 29 | .\" -----------------------------------------------------------------
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| 30 | .SH "NAME"
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| 31 | vfs_streams_xattr \- Store alternate data streams in posix xattrs
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| 32 | .SH "SYNOPSIS"
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| 33 | .HP \w'\ 'u
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| 34 | vfs objects = streams_xattr
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| 35 | .SH "DESCRIPTION"
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| 36 | .PP
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| 37 | This VFS module is part of the
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| 38 | \fBsamba\fR(7)
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| 39 | suite\&.
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| 40 | .PP
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| 41 | The
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| 42 | vfs_streams_xattr
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| [988] | 43 | enables storing of NTFS alternate data streams in the file system\&. As a normal posix file system does not support the concept of multiple data streams per file, the streams_xattr module stores the data in posix extended attributes (xattrs)\&. The name of these attributes by default is user\&.DosStream\&."ADS\-NAME"\&. The prefix "user\&.DosStream\&." can be changed with the module option
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| 44 | streams_xattr:prefix, but be aware that this will also expose those ADS over the SMB extended attributes interface\&.
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| [860] | 45 | .PP
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| 46 | The file system that is shared with this module enabled must support xattrs\&.
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| 47 | .PP
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| 48 | Please note that most file systems have severe limitations on the size of xattrs\&. So this module might work for applications like IE that stores small zone information in streams but will fail for applications that store serious amounts of data in ADSs\&.
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| [988] | 49 | .PP
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| 50 | CAUTION: Make sure to set "kernel oplocks = no" in smb\&.conf if if you use this module because this combination is currently broken\&. See Bug 7537 for details\&.
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| 51 | .SH "OPTIONS"
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| 52 | .PP
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| 53 | streams_xattr:prefix = STRING
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| 54 | .RS 4
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| 55 | Name prefix used when storing an ADS in an xattr, defaults to
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| 56 | user\&.DosStream\&.\&. Changing this will also expose ADS over the SMB extended attributes interface\&.
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| 57 | .RE
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| 58 | .PP
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| 59 | streams_xattr:store_stream_type = [yes|no]
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| 60 | .RS 4
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| 61 | Whether the xattr names for Alternate Data Streams of type "$DATA" are suffixed by the stream type string ":$DATA"\&. The default is
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| 62 | yes\&.
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| 63 | .RE
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| [860] | 64 | .SH "EXAMPLES"
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| 65 | .sp
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| 66 | .if n \{\
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| 67 | .RS 4
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| 68 | .\}
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| 69 | .nf
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| 70 | \fI[share]\fR
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| 71 | \m[blue]\fBvfs objects = streams_xattr\fR\m[]
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| 72 | .fi
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| 73 | .if n \{\
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| 74 | .RE
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| 75 | .\}
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| 76 | .SH "AUTHOR"
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| 77 | .PP
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| 78 | The original Samba software and related utilities were created by Andrew Tridgell\&. Samba is now developed by the Samba Team as an Open Source project similar to the way the Linux kernel is developed\&.
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