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affa893da0
This also adds a <citerefentry project="url"> type, since the other btrfs manpages use man-pages/die-net and are alive, and btrfs.w.k.o won't be used anywhere else
96 lines
5.2 KiB
XML
96 lines
5.2 KiB
XML
<?xml version="1.0"?>
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<!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!-- SPDX-License-Identifier: LGPL-2.1+ -->
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<refentry id="systemd-makefs@.service">
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<refentryinfo>
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<title>systemd-makefs@.service</title>
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<productname>systemd</productname>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd-makefs@.service</refentrytitle>
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<manvolnum>8</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd-makefs@.service</refname>
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<refname>systemd-mkswap@.service</refname>
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<refname>systemd-growfs@.service</refname>
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<refname>systemd-makefs</refname>
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<refname>systemd-growfs</refname>
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<refpurpose>Creating and growing file systems on demand</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>systemd-makefs@<replaceable>device</replaceable>.service</filename></para>
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<para><filename>systemd-mkswap@<replaceable>device</replaceable>.service</filename></para>
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<para><filename>systemd-growfs@<replaceable>mountpoint</replaceable>.service</filename></para>
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<para><filename>/usr/lib/systemd/systemd-makefs</filename></para>
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<para><filename>/usr/lib/systemd/systemd-growfs</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><filename>systemd-makefs@.service</filename>,
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<filename>systemd-mkswap@.service</filename>, and
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<filename>systemd-growfs@.service</filename> are used to implement the
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<option>x-systemd.makefs</option> and <option>x-systemd.growfs</option> options
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in <citerefentry project='man-pages'><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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see <citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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They are instantiated for each device for which the file system or swap structure
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needs to be initialized, and for each mount point where the file system needs to
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be grown.</para>
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<para>These services are started at boot, either right before or right after the
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mount point or swap device are used.</para>
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<para><filename>systemd-makefs</filename> knows very little about specific file
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systems and swap devices, and after checking that the block device does not already
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contain a file system or other content, it will execute binaries specific to
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each filesystem type (<filename>/sbin/mkfs.<replaceable>type</replaceable></filename>
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or <filename>/sbin/mkswap</filename>).</para>
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<para><filename>systemd-growfs</filename> knows very little about specific file
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systems and swap devices, and will instruct the kernel to grow the mounted
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filesystem to full size of the underlying block device. Nevertheless, it needs
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to know the
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<citerefentry project='man-pages'><refentrytitle>ioctl</refentrytitle><manvolnum>2</manvolnum></citerefentry>
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number specific to each file system, so only certain types are supported.
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Currently:
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<citerefentry project='man-pages'><refentrytitle>ext4</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry project='url'><refentrytitle url='https://btrfs.wiki.kernel.org/index.php/Manpage/btrfs(5)'>btrfs</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>xfs</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<!-- yes, that's what the man page is called. -->
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and dm-crypt partitions (see
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<citerefentry project='die-net'><refentrytitle>cryptsetup</refentrytitle><manvolnum>8</manvolnum></citerefentry>).
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</para>
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<para>If the creation of a file system or swap device fails, the mount point or
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swap is failed too. If the growing of a file system fails, a warning is emitted.
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</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>systemd-repart</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>mkfs.btrfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>mkfs.cramfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>mkfs.ext4</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>mkfs.fat</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>mkfs.hfsplus</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>mkfs.minix</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>mkfs.ntfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
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<citerefentry project='man-pages'><refentrytitle>mkfs.xfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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