| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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| 7 | <!ENTITY btrfs-progs-download-http "&kernel-dl;/linux/kernel/people/kdave/btrfs-progs/btrfs-progs-v&btrfs-progs-version;.tar.xz">
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| 8 | <!ENTITY btrfs-progs-download-ftp " ">
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| 9 | <!ENTITY btrfs-progs-md5sum "1b5705b3e9503f09a9598dad1e7bfbc8">
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| 10 | <!ENTITY btrfs-progs-size "3.0 MB">
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| 11 | <!ENTITY btrfs-progs-buildsize "62 MB (transient files created during tests need up to 10 GB)">
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| 12 | <!ENTITY btrfs-progs-time "0.2 SBU (add 3.8 SBU for tests, up to 80 SBU on slow disks if reiserfsprogs is installed)">
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| 13 | ]>
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| 14 |
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| 15 | <sect1 id="btrfs-progs" xreflabel="btrfs-progs-&btrfs-progs-version;">
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| 16 | <?dbhtml filename="btrfs-progs.html"?>
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| 17 |
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| 18 |
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| 19 | <title>btrfs-progs-&btrfs-progs-version;</title>
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| 20 |
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| 21 | <indexterm zone="btrfs-progs">
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| 22 | <primary sortas="a-btrfs-progs">btrfs-progs</primary>
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| 23 | </indexterm>
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| 24 |
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| 25 | <sect2 role="package">
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| 26 | <title>Introduction to btrfs-progs</title>
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| 27 |
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| 28 | <para>
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| 29 | The <application>btrfs-progs</application> package contains
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| 30 | administration and debugging tools for the B-tree file system (btrfs).
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| 31 | </para>
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| 32 |
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| 33 | &lfs120_checked;
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| 34 |
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| 35 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 36 | <itemizedlist spacing="compact">
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| 37 | <listitem>
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| 38 | <para>
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| 39 | Download (HTTP): <ulink url="&btrfs-progs-download-http;"/>
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| 40 | </para>
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| 41 | </listitem>
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| 42 | <listitem>
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| 43 | <para>
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| 44 | Download (FTP): <ulink url="&btrfs-progs-download-ftp;"/>
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| 45 | </para>
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| 46 | </listitem>
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| 47 | <listitem>
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| 48 | <para>
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| 49 | Download MD5 sum: &btrfs-progs-md5sum;
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| 50 | </para>
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| 51 | </listitem>
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| 52 | <listitem>
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| 53 | <para>
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| 54 | Download size: &btrfs-progs-size;
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| 55 | </para>
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| 56 | </listitem>
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| 57 | <listitem>
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| 58 | <para>
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| 59 | Estimated disk space required: &btrfs-progs-buildsize;
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| 60 | </para>
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| 61 | </listitem>
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| 62 | <listitem>
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| 63 | <para>
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| 64 | Estimated build time: &btrfs-progs-time;
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| 65 | </para>
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| 66 | </listitem>
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| 67 | </itemizedlist>
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| 68 | <!--
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| 69 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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| 70 | <itemizedlist spacing="compact">
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| 71 | <listitem>
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| 72 | <para>
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| 73 | Required patch if building with linux kernel headers version
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| 74 | before 5.12:
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| 75 | <ulink url="&patch-root;/btrfs-progs-&btrfs-progs-version;-headers_fix-1.patch"/>
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| 76 | </para>
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| 77 | </listitem>
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| 78 | </itemizedlist>
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| 79 | -->
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| 80 | <bridgehead renderas="sect3">Btrfs-progs Dependencies</bridgehead>
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| 81 |
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| 82 | <bridgehead renderas="sect4">Required</bridgehead>
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| 83 | <para role="required">
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| 84 | <xref linkend="lzo"/>
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| 85 | </para>
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| 86 | <!-- In v6.2.1 (and maybe previous), sphinx is required for the doc
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| 87 | <bridgehead renderas="sect4">Recommended</bridgehead>
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| 88 | <para role="recommended">
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| 89 | <xref linkend="asciidoc"/> (or <xref role="nodep" linkend="asciidoctor"/>)
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| 90 | and <xref linkend="xmlto"/> (both required to generate man pages)
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| 91 | </para>
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| 92 | -->
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| 93 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 94 | <para role="optional">
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| 95 | <xref linkend="lvm2"/> (<command>dmsetup</command> is used in tests),
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| 96 | <xref linkend="sphinx"/> (required to build documentation), and
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| 97 | <ulink
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| 98 | url='https://mirrors.edge.kernel.org/pub/linux/kernel/people/jeffm/reiserfsprogs/'>
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| 99 | reiserfsprogs</ulink> (for tests).
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| 100 |
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| 101 | </para>
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| 102 |
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| 103 |
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| 104 | </sect2>
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| 105 |
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| 106 | <sect2 role="kernel" id="btrfs-progs-kernel">
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| 107 | <title>Kernel Configuration</title>
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| 108 |
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| 109 | <para>
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| 110 | Enable the following option in the kernel configuration
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| 111 | and recompile the kernel:
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| 112 | </para>
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| 113 |
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| 114 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 115 | href="btrfs-progs-kernel.xml"/>
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| 116 |
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| 117 | <para>
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| 118 | In addition to the above and to the options required for
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| 119 | <xref linkend="lvm2"/>, the following
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| 120 | options must be enabled for running tests:
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| 121 | </para>
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| 122 |
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| 123 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 124 | href="btrfs-progs-test-kernel.xml"/>
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| 125 |
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| 126 | <indexterm zone="btrfs-progs btrfs-progs-kernel">
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| 127 | <primary sortas="d-btrfs-progs">BTRFS Programs</primary>
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| 128 | </indexterm>
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| 129 |
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| 130 | </sect2>
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| 131 |
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| 132 | <sect2 role="installation">
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| 133 | <title>Installation of btrfs-progs</title>
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| 134 |
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| 135 | <para>
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| 136 | Install <application>btrfs-progs</application> by running the following
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| 137 | commands:
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| 138 | </para>
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| 139 |
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| 140 | <screen><userinput>./configure --prefix=/usr \
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| 141 | --disable-static \
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| 142 | --disable-documentation &&
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| 143 | make</userinput></screen>
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| 144 |
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| 145 | <note>
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| 146 | <para>
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| 147 | Some tests require grep built with perl regular expressions. To
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| 148 | obtain this, rebuild grep with the LFS Chapter 8 instructions after
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| 149 | installing <xref linkend="pcre2"/>.
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| 150 | </para>
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| 151 | </note>
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| 152 | <!-- Keeping this for now, but it seems that calling "make test" is
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| 153 | simpler and does the same thing -->
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| 154 | <para>
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| 155 | Before running tests, build a support program:
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| 156 | </para>
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| 157 |
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| 158 | <screen remap="test"><userinput>make fssum</userinput></screen>
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| 159 |
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| 160 | <para>
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| 161 | To test the results, issue (as the &root; user):
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| 162 | </para>
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| 163 |
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| 164 | <screen role="root" remap="test"><userinput>pushd tests
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| 165 | ./fsck-tests.sh
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| 166 | ./mkfs-tests.sh
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| 167 | ./cli-tests.sh
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| 168 | sed 's/,orphan_file//' /etc/mke2fs.conf >./custom_mke2fs.conf &&
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| 169 | export MKE2FS_CONFIG=$PWD/custom_mke2fs.conf &&
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| 170 | ./convert-tests.sh
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| 171 | unset MKE2FS_CONFIG && rm custom_mke2fs.conf
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| 172 | ./misc-tests.sh
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| 173 | ./fuzz-tests.sh
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| 174 | popd</userinput></screen>
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| 175 |
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| 176 | <!-- Template for failed test removal:
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| 177 | <para>
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| 178 | To test the results, first disable one test that fails and prevents
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| 179 | the other ones to run:
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| 180 | </para>
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| 181 |
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| 182 | <screen remap="test"><userinput>mv tests/fsck-tests/012-leaf-corruption/test.sh{,.broken}</userinput></screen>
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| 183 | Substitute your test failure with the one above.
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| 184 | <para>
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| 185 | To test the results, run (as the
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| 186 | <systemitem class="username">root</systemitem> user):
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| 187 | </para>
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| 188 |
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| 189 | <screen role="root" remap="test"><userinput>make -j1 -k test</userinput></screen>
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| 190 | -->
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| 191 | <note>
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| 192 | <para>
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| 193 | If the above mentioned kernel options are not enabled, some tests
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| 194 | fail, and prevent all the remaining tests from running because the test
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| 195 | disk image is not cleanly unmounted.
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| 196 | </para>
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| 197 | </note>
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| 198 | <!-- Now passes in version 6.3.1.
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| 199 | <para>
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| 200 | The mkfs test 025-zoned-parallel is known to fail.
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| 201 | </para>
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| 202 | -->
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| 203 | <para>
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| 204 | Install the package as the &root; user:
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| 205 | </para>
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| 206 |
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| 207 | <screen role="root"><userinput>make install</userinput></screen>
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| 208 |
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| 209 | <para>
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| 210 | If you have passed <parameter>--disable-documentation</parameter> to
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| 211 | <command>configure</command> and you need the manual pages, install them
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| 212 | by running, as the &root; user:
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| 213 | </para>
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| 214 |
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| 215 | <screen role="root"><userinput>for i in 5 8; do
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| 216 | install Documentation/*.$i /usr/share/man/man$i
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| 217 | done</userinput></screen>
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| 218 |
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| 219 | </sect2>
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| 220 |
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| 221 | <sect2 role="commands">
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| 222 | <title>Command Explanations</title>
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| 223 |
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| 224 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 225 | href="../../xincludes/static-libraries.xml"/>
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| 226 |
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| 227 | <para>
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| 228 | <parameter>--disable-documentation</parameter>: This switch
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| 229 | disables rebuilding the manual pages, because it requires
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| 230 | <xref linkend="sphinx"/>.
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| 231 | </para>
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| 232 | <para>
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| 233 | <command>sed 's/,orphan_file//" ...</command>: In this version of
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| 234 | <application>btrfs-progs</application>, the
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| 235 | <command>btrfs-convert</command> program produces a btrfs filesystem
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| 236 | containing errors if converting from an ext4 filesystem created
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| 237 | with the <quote>orphan_file</quote> feature. This command creates
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| 238 | a custom configuration file that prevents creating a filesystem
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| 239 | with this feature.
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| 240 | </para>
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| 241 | <!--
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| 242 | <para>
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| 243 | <command>ln -s ... /usr/lib/libbtrfs.so</command>: Creates a
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| 244 | symbolic link in the directory where it is expected.
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| 245 | </para>
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| 246 |
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| 247 | <para>
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| 248 | <command>rm /lib/libbtrfs.{a,so}</command>: Removes unneeded
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| 249 | library entries.
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| 250 | </para>
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| 251 | -->
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| 252 | </sect2>
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| 253 |
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| 254 | <sect2 role="using" id="using-btrfs-convert">
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| 255 | <title>Using the btrfs-convert Program</title>
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| 256 |
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| 257 | <para>
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| 258 | This version of <application>btrfs-progs</application> does not convert
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| 259 | correctly ext4 filesystems to btrfs if the ext4
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| 260 | <option>orphan_file</option> feature is turned on. If you happen to
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| 261 | convert such a filesystem, you need to first run:
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| 262 | </para>
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| 263 |
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| 264 | <screen role="nodump"><userinput>tune2fs -O ^orphan_file <replaceable>/dev/sdxx</replaceable></userinput></screen>
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| 265 |
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| 266 | <para>
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| 267 | where <filename>/dev/sdxx</filename> is the partition of the filesystem
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| 268 | you want to convert.
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| 269 | </para>
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| 270 | </sect2>
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| 271 |
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| 272 | <sect2 role="content">
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| 273 | <title>Contents</title>
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| 274 |
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| 275 | <segmentedlist>
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| 276 | <segtitle>Installed Programs</segtitle>
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| 277 | <segtitle>Installed Libraries</segtitle>
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| 278 | <segtitle>Installed Directories</segtitle>
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| 279 |
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| 280 | <seglistitem>
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| 281 | <seg>
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| 282 | btrfs,
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| 283 | btrfs-convert,
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| 284 | btrfs-find-root,
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| 285 | btrfs-image,
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| 286 | btrfs-map-logical,
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| 287 | btrfs-select-super,
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| 288 | btrfsck (link to btrfs),
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| 289 | btrfstune,
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| 290 | fsck.btrfs, and
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| 291 | mkfs.btrfs
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| 292 | </seg>
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| 293 |
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| 294 | <seg>
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| 295 | libbtrfs.so and
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| 296 | libbtrfsutil.so
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| 297 | </seg>
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| 298 |
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| 299 | <seg>/usr/include/btrfs</seg>
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| 300 | </seglistitem>
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| 301 | </segmentedlist>
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| 302 |
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| 303 | <variablelist>
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| 304 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 305 | <?dbfo list-presentation="list"?>
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| 306 | <?dbhtml list-presentation="table"?>
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| 307 |
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| 308 | <varlistentry id="btrfs-prog">
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| 309 | <term><command>btrfs</command></term>
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| 310 | <listitem>
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| 311 | <para>
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| 312 | is the main interface into btrfs filesystem operations
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| 313 | </para>
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| 314 | <indexterm zone="btrfs-progs btrfs-prog">
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| 315 | <primary sortas="b-btrfs">btrfs</primary>
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| 316 | </indexterm>
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| 317 | </listitem>
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| 318 | </varlistentry>
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| 319 |
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| 320 | <varlistentry id="btrfs-convert">
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| 321 | <term><command>btrfs-convert</command></term>
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| 322 | <listitem>
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| 323 | <para>
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| 324 | converts from an ext2/3/4 or reiserfs filesystem to btrfs (see
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| 325 | <xref linkend="using-btrfs-convert"/> above)
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| 326 | </para>
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| 327 | <indexterm zone="btrfs-progs btrfs-convert">
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| 328 | <primary sortas="b-btrfs-convert">btrfs-convert</primary>
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| 329 | </indexterm>
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| 330 | </listitem>
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| 331 | </varlistentry>
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| 332 |
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| 333 | <varlistentry id="btrfs-find-root">
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| 334 | <term><command>btrfs-find-root</command></term>
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| 335 | <listitem>
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| 336 | <para>
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| 337 | is a filter to find btrfs root
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| 338 | </para>
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| 339 | <indexterm zone="btrfs-progs btrfs-find-root">
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| 340 | <primary sortas="b-btrfs-find-root">btrfs-find-root</primary>
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| 341 | </indexterm>
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| 342 | </listitem>
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| 343 | </varlistentry>
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| 344 |
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| 345 | <varlistentry id="btrfs-map-logical">
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| 346 | <term><command>btrfs-map-logical</command></term>
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| 347 | <listitem>
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| 348 | <para>
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| 349 | maps btrfs logical extent to physical extent
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| 350 | </para>
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| 351 | <indexterm zone="btrfs-progs btrfs-map-logical">
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| 352 | <primary sortas="b-btrfs-map-logical">btrfs-map-logical</primary>
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| 353 | </indexterm>
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| 354 | </listitem>
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| 355 | </varlistentry>
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| 356 |
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| 357 | <varlistentry id="btrfs-select-super">
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| 358 | <term><command>btrfs-select-super</command></term>
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| 359 | <listitem>
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| 360 | <para>
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| 361 | overwrites the primary superblock with a backup copy
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| 362 | </para>
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| 363 | <indexterm zone="btrfs-progs btrfs-select-super">
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| 364 | <primary sortas="b-btrfs-select-super">btrfs-select-super</primary>
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| 365 | </indexterm>
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| 366 | </listitem>
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| 367 | </varlistentry>
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| 368 |
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| 369 | <varlistentry id="btrfstune">
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| 370 | <term><command>btrfstune</command></term>
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| 371 | <listitem>
|
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| 372 | <para>
|
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| 373 | tunes various filesystem parameters
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| 374 | </para>
|
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| 375 | <indexterm zone="btrfs-progs btrfstune">
|
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| 376 | <primary sortas="b-btrfstune">btrfstune</primary>
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| 377 | </indexterm>
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| 378 | </listitem>
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| 379 | </varlistentry>
|
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| 380 |
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| 381 | <varlistentry id="fsck.btrfs">
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| 382 | <term><command>fsck.btrfs</command></term>
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| 383 | <listitem>
|
|---|
| 384 | <para>
|
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| 385 | does nothing, but is present for consistency with fstab
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| 386 | </para>
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| 387 | <indexterm zone="btrfs-progs fsck.btrfs">
|
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| 388 | <primary sortas="b-fsck.btrfs">fsck.btrfs</primary>
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| 389 | </indexterm>
|
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| 390 | </listitem>
|
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| 391 | </varlistentry>
|
|---|
| 392 |
|
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| 393 | <varlistentry id="mkfs.btrfs">
|
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| 394 | <term><command>mkfs.btrfs</command></term>
|
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| 395 | <listitem>
|
|---|
| 396 | <para>
|
|---|
| 397 | creates a btrfs file system
|
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| 398 | </para>
|
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| 399 | <indexterm zone="btrfs-progs mkfs.btrfs">
|
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| 400 | <primary sortas="b-mkfs.btrfs">mkfs.btrfs</primary>
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| 401 | </indexterm>
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| 402 | </listitem>
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| 403 | </varlistentry>
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|---|
| 404 |
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| 405 | </variablelist>
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|---|
| 406 |
|
|---|
| 407 | </sect2>
|
|---|
| 408 |
|
|---|
| 409 | </sect1>
|
|---|
