| <?xml version="1.0"?> |
| <!--*-nxml-*--> |
| <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
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| Copyright 2013 Lennart Poettering |
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| <refentry id="systemd-gpt-auto-generator"> |
| |
| <refentryinfo> |
| <title>systemd-gpt-auto-generator</title> |
| <productname>systemd</productname> |
| |
| <authorgroup> |
| <author> |
| <contrib>Developer</contrib> |
| <firstname>Lennart</firstname> |
| <surname>Poettering</surname> |
| <email>lennart@poettering.net</email> |
| </author> |
| </authorgroup> |
| </refentryinfo> |
| |
| <refmeta> |
| <refentrytitle>systemd-gpt-auto-generator</refentrytitle> |
| <manvolnum>8</manvolnum> |
| </refmeta> |
| |
| <refnamediv> |
| <refname>systemd-gpt-auto-generator</refname> |
| <refpurpose>Generator for automatically discovering |
| and mounting root, <filename>/home</filename> and |
| <filename>/srv</filename> partitions, as well as |
| discovering and enabling swap partitions, based on GPT |
| partition type GUIDs.</refpurpose> |
| </refnamediv> |
| |
| <refsynopsisdiv> |
| <para><filename>/usr/lib/systemd/system-generators/systemd-gpt-auto-generator</filename></para> |
| </refsynopsisdiv> |
| |
| <refsect1> |
| <title>Description</title> |
| |
| <para><filename>systemd-gpt-auto-generator</filename> |
| is a unit generator that automatically discovers root, |
| <filename>/home</filename>, <filename>/srv</filename> |
| and swap partitions and creates mount and swap units |
| for them, based on the partition type GUIDs of |
| GUID partition tables (GPT). It implements the <ulink |
| url="http://www.freedesktop.org/wiki/Specifications/DiscoverablePartitionsSpec/">Discoverable |
| Partitions Specification</ulink>. Note that this |
| generator has no effect on non-GPT systems, on systems |
| where the units are explicitly configured (for |
| example, listed in |
| <citerefentry><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>), |
| or where the mount points are non-empty.</para> |
| |
| <para>This generator will only look for root |
| partitions on the same physical disk the EFI System |
| Partition (ESP) is located on. It will only look for |
| the other partitions on the same physical disk the |
| root file system is located on. These partitions will |
| not be searched on systems where the root file system is |
| distributed on multiple disks, for example via btrfs |
| RAID.</para> |
| |
| <para><filename>systemd-gpt-auto-generator</filename> |
| is useful for centralizing file system configuration |
| in the partition table and making manual configuration |
| in <filename>/etc/fstab</filename> or suchlike |
| unnecessary.</para> |
| |
| <para>This generator looks for the partitions based on |
| their partition type GUID. The following partition |
| type GUIDs are identified:</para> |
| |
| <table> |
| <title>Partition Type GUIDs</title> |
| <tgroup cols='3' align='left' colsep='1' rowsep='1'> |
| <colspec colname="guid" /> |
| <colspec colname="name" /> |
| <colspec colname="explanation" /> |
| <thead> |
| <row> |
| <entry>Partition Type GUID</entry> |
| <entry>Name</entry> |
| <entry>Explanation</entry> |
| </row> |
| </thead> |
| <tbody> |
| <row> |
| <entry>44479540-f297-41b2-9af7-d131d5f0458a</entry> |
| <entry><filename>Root Partition (x86)</filename></entry> |
| <entry>On 32-bit x86 systems, the first x86 root partition on the disk the EFI ESP is located on is mounted to the root directory <filename>/</filename>.</entry> |
| </row> |
| <row> |
| <entry>4f68bce3-e8cd-4db1-96e7-fbcaf984b709</entry> |
| <entry><filename>Root Partition (x86-64)</filename></entry> |
| <entry>On 64-bit x86 systems, the first x86-64 root partition on the disk the EFI ESP is located on is mounted to the root directory <filename>/</filename>.</entry> |
| </row> |
| <row> |
| <entry>69dad710-2ce4-4e3c-b16c-21a1d49abed3</entry> |
| <entry><filename>Root Partition (32-bit ARM)</filename></entry> |
| <entry>On 32-bit ARM systems, the first ARM root partition on the disk the EFI ESP is located on is mounted to the root directory <filename>/</filename>.</entry> |
| </row> |
| <row> |
| <entry>b921b045-1df0-41c3-af44-4c6f280d3fae</entry> |
| <entry><filename>Root Partition (64-bit ARM)</filename></entry> |
| <entry>On 64-bit ARM systems, the first ARM root partition on the disk the EFI ESP is located on is mounted to the root directory <filename>/</filename>.</entry> |
| </row> |
| <row> |
| <entry>933ac7e1-2eb4-4f13-b844-0e14e2aef915</entry> |
| <entry>Home Partition</entry> |
| <entry>The first home partition on the disk the root partition is located on is mounted to <filename>/home</filename>.</entry> |
| </row> |
| <row> |
| <entry>3b8f8425-20e0-4f3b-907f-1a25a76f98e8</entry> |
| <entry>Server Data Partition</entry> |
| <entry>The first server data partition on the disk the root partition is located on is mounted to <filename>/srv</filename>.</entry> |
| </row> |
| <row> |
| <entry>0657fd6d-a4ab-43c4-84e5-0933c84b4f4f</entry> |
| <entry>Swap</entry> |
| <entry>All swap partitions located on the disk the root partition is located on are enabled.</entry> |
| </row> |
| </tbody> |
| </tgroup> |
| </table> |
| |
| <para>The <filename>/home</filename> and |
| <filename>/srv</filename> partitions may be encrypted |
| in LUKS format. In this case a device mapper device is |
| set up under the names |
| <filename>/dev/mapper/home</filename> and |
| <filename>/dev/mapper/srv</filename>. Note that this |
| might create conflicts if the same partition is listed |
| in <filename>/etc/crypttab</filename> with a different |
| device mapper device name.</para> |
| |
| <para>Also note that |
| <citerefentry><refentrytitle>systemd-efi-boot-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry> |
| will mount the EFI System Partition (ESP) to |
| <filename>/boot</filename> if not otherwise mounted.</para> |
| |
| <para>When using this generator in conjunction with |
| btrfs file systems, make sure to set the correct |
| default subvolumes on them, using <command>btrfs |
| subvolume set-default</command>.</para> |
| |
| <para><filename>systemd-gpt-auto-generator</filename> |
| implements the <ulink |
| url="http://www.freedesktop.org/wiki/Software/systemd/Generators">Generator |
| Specification</ulink>.</para> |
| </refsect1> |
| |
| <refsect1> |
| <title>See Also</title> |
| <para> |
| <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>systemd.swap</refentrytitle><manvolnum>5</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>systemd-efi-boot-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>systemd-cryptsetup@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>cryptsetup</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>btrfs</refentrytitle><manvolnum>8</manvolnum></citerefentry> |
| </para> |
| </refsect1> |
| |
| </refentry> |