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506c520503
Signed-off-by: Jeremy Allison <jra@samba.org> Reviewed-by: Volker Lendecke <vl@samba.org> Autobuild-User(master): Volker Lendecke <vl@samba.org> Autobuild-Date(master): Tue May 15 12:40:48 CEST 2018 on sn-devel-144
35 lines
1.7 KiB
XML
35 lines
1.7 KiB
XML
<samba:parameter name="ea support"
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context="S"
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type="boolean"
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xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
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<description>
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<para>This boolean parameter controls whether <citerefentry><refentrytitle>smbd</refentrytitle>
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<manvolnum>8</manvolnum></citerefentry> will allow clients to attempt to access extended
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attributes on a share. In order to enable this parameter on a setup with default VFS modules:
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</para>
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<itemizedlist>
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<listitem><para>Samba must have been built with extended attributes support.
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</para></listitem>
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<listitem><para>The underlying filesystem exposed by the share must support extended
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attributes (e.g. the getfattr<manvolnum>1</manvolnum> / setfattr<manvolnum>1</manvolnum>
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utilities must work).
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</para></listitem>
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</itemizedlist>
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<para>
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Note that the SMB protocol allows setting attributes whose value is 64K bytes long,
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and that on NTFS, the maximum storage space for extended attributes per file is 64K.
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On most UNIX systems (Solaris and ZFS file system being the exception), the limits
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are much lower - typically 4K. Worse, the same 4K space is often used to store
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system metadata such as POSIX ACLs, or Samba's NT ACLs. Giving clients
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access to this tight space via extended attribute support could consume all
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of it by unsuspecting client applications, which would prevent changing
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system metadata due to lack of space.
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The default has changed to yes in Samba release 4.9.0 and above to allow better Windows
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fileserver compatibility in a default install.
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</para>
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</description>
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<value type="default">yes</value>
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</samba:parameter>
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