| 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 | &lfs113_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="reiserfs"/> (for tests), and
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| 97 | <xref linkend="sphinx"/> (required to build documentation)
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| 98 |
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| 99 | </para>
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| 100 |
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| 101 |
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| 102 | </sect2>
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| 103 |
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| 104 | <sect2 role="kernel" id="btrfs-progs-kernel">
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| 105 | <title>Kernel Configuration</title>
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| 106 |
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| 107 | <para>
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| 108 | Enable the following option in the kernel configuration
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| 109 | and recompile the kernel:
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| 110 | </para>
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| 111 |
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| 112 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 113 | href="btrfs-progs-kernel.xml"/>
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| 114 |
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| 115 | <para>
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| 116 | In addition to the above and to the options required for
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| 117 | <xref linkend="lvm2"/> and <xref linkend="reiserfs"/>, the following
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| 118 | options must be enabled for running tests:
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| 119 | </para>
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| 120 |
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| 121 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 122 | href="btrfs-progs-test-kernel.xml"/>
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| 123 |
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| 124 | <indexterm zone="btrfs-progs btrfs-progs-kernel">
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| 125 | <primary sortas="d-btrfs-progs">BTRFS Programs</primary>
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| 126 | </indexterm>
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| 127 |
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| 128 | </sect2>
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| 129 |
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| 130 | <sect2 role="installation">
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| 131 | <title>Installation of btrfs-progs</title>
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| 132 |
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| 133 | <para>
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| 134 | Install <application>btrfs-progs</application> by running the following
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| 135 | commands:
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| 136 | </para>
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| 137 |
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| 138 | <screen><userinput>./configure --prefix=/usr \
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| 139 | --disable-static \
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| 140 | --disable-documentation &&
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| 141 | make</userinput></screen>
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| 142 |
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| 143 | <note>
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| 144 | <para>
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| 145 | Some tests require grep built with perl regular expressions. To
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| 146 | obtain this, rebuild grep with the LFS Chapter 8 instructions after
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| 147 | installing <xref linkend="pcre2"/>.
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| 148 | </para>
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| 149 | </note>
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| 150 | <!-- Keeping this for now, but it seems that calling "make test" is
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| 151 | simpler and does the same thing -->
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| 152 | <para>
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| 153 | Before running tests, build a support program:
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| 154 | </para>
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| 155 |
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| 156 | <screen remap="test"><userinput>make fssum</userinput></screen>
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| 157 |
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| 158 | <para>
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| 159 | To test the results, issue (as the &root; user):
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| 160 | </para>
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| 161 |
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| 162 | <screen role="root" remap="test"><userinput>pushd tests
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| 163 | ./fsck-tests.sh
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| 164 | ./mkfs-tests.sh
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| 165 | ./cli-tests.sh
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| 166 | sed 's/,orphan_file//' /etc/mke2fs.conf >./custom_mke2fs.conf &&
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| 167 | export MKE2FS_CONFIG=$PWD/custom_mke2fs.conf &&
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| 168 | ./convert-tests.sh
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| 169 | unset MKE2FS_CONFIG && rm custom_mke2fs.conf
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| 170 | ./misc-tests.sh
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| 171 | ./fuzz-tests.sh
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| 172 | popd</userinput></screen>
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| 173 |
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| 174 | <!-- Template for failed test removal:
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| 175 | <para>
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| 176 | To test the results, first disable one test that fails and prevents
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| 177 | the other ones to run:
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| 178 | </para>
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| 179 |
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| 180 | <screen remap="test"><userinput>mv tests/fsck-tests/012-leaf-corruption/test.sh{,.broken}</userinput></screen>
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| 181 | Substitute your test failure with the one above.
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| 182 | <para>
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| 183 | To test the results, run (as the
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| 184 | <systemitem class="username">root</systemitem> user):
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| 185 | </para>
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| 186 |
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| 187 | <screen role="root" remap="test"><userinput>make -j1 -k test</userinput></screen>
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| 188 | -->
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| 189 | <note>
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| 190 | <para>
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| 191 | If the above mentioned kernel options are not enabled, some tests
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| 192 | fail, and prevent all the remaining tests from running because the test
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| 193 | disk image is not cleanly unmounted.
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| 194 | </para>
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| 195 | </note>
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| 196 | <!-- Now passes in version 6.3.1.
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| 197 | <para>
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| 198 | The mkfs test 025-zoned-parallel is known to fail.
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| 199 | </para>
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| 200 | -->
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| 201 | <para>
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| 202 | Install the package as the &root; user:
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| 203 | </para>
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| 204 |
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| 205 | <screen role="root"><userinput>make install</userinput></screen>
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| 206 |
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| 207 | <para>
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| 208 | If you have passed <parameter>--disable-documentation</parameter> to
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| 209 | <command>configure</command> and you need the manual pages, install them
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| 210 | by running, as the &root; user:
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| 211 | </para>
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| 212 |
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| 213 | <screen role="root"><userinput>for i in 5 8; do
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| 214 | install Documentation/*.$i /usr/share/man/man$i
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| 215 | done</userinput></screen>
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| 216 |
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| 217 | </sect2>
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| 218 |
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| 219 | <sect2 role="commands">
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| 220 | <title>Command Explanations</title>
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| 221 |
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| 222 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 223 | href="../../xincludes/static-libraries.xml"/>
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| 224 |
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| 225 | <para>
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| 226 | <parameter>--disable-documentation</parameter>: This switch
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| 227 | disables rebuilding the manual pages, because it requires
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| 228 | <xref linkend="sphinx"/>.
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| 229 | </para>
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| 230 | <para>
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| 231 | <command>sed 's/,orphan_file//" ...</command>: In this version of
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| 232 | <application>btrfs-progs</application>, the
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| 233 | <command>btrfs-convert</command> program produces a btrfs filesystem
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| 234 | containing errors if converting from an ext4 filesystem created
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| 235 | with the <quote>orphan_file</quote> feature. This command creates
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| 236 | a custom configuration file that prevents creating a filesystem
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| 237 | with this feature.
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| 238 | </para>
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| 239 | <!--
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| 240 | <para>
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| 241 | <command>ln -s ... /usr/lib/libbtrfs.so</command>: Creates a
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| 242 | symbolic link in the directory where it is expected.
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| 243 | </para>
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| 244 |
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| 245 | <para>
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| 246 | <command>rm /lib/libbtrfs.{a,so}</command>: Removes unneeded
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| 247 | library entries.
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| 248 | </para>
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| 249 | -->
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| 250 | </sect2>
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| 251 |
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| 252 | <sect2 role="using" id="using-btrfs-convert">
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| 253 | <title>Using the btrfs-convert Program</title>
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| 254 |
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| 255 | <para>
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| 256 | This version of <application>btrfs-progs</application> does not convert
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| 257 | correctly ext4 filesystems to btrfs if the ext4
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| 258 | <option>orphan_file</option> feature is turned on. If you happen to
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| 259 | convert such a filesystem, you need to first run:
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| 260 | </para>
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| 261 |
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| 262 | <screen role="nodump"><userinput>tune2fs -O ^orphan_file <replaceable>/dev/sdxx</replaceable></userinput></screen>
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| 263 |
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| 264 | <para>
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| 265 | where <filename>/dev/sdxx</filename> is the partition of the filesystem
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| 266 | you want to convert.
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| 267 | </para>
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| 268 | </sect2>
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| 269 |
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| 270 | <sect2 role="content">
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| 271 | <title>Contents</title>
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| 272 |
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| 273 | <segmentedlist>
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| 274 | <segtitle>Installed Programs</segtitle>
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| 275 | <segtitle>Installed Libraries</segtitle>
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| 276 | <segtitle>Installed Directories</segtitle>
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| 277 |
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| 278 | <seglistitem>
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| 279 | <seg>
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| 280 | btrfs,
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| 281 | btrfs-convert,
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| 282 | btrfs-find-root,
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| 283 | btrfs-image,
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| 284 | btrfs-map-logical,
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| 285 | btrfs-select-super,
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| 286 | btrfsck (link to btrfs),
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| 287 | btrfstune,
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| 288 | fsck.btrfs, and
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| 289 | mkfs.btrfs
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| 290 | </seg>
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| 291 |
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| 292 | <seg>
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| 293 | libbtrfs.so and
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| 294 | libbtrfsutil.so
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| 295 | </seg>
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| 296 |
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| 297 | <seg>/usr/include/btrfs</seg>
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| 298 | </seglistitem>
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| 299 | </segmentedlist>
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| 300 |
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| 301 | <variablelist>
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| 302 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 303 | <?dbfo list-presentation="list"?>
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| 304 | <?dbhtml list-presentation="table"?>
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| 305 |
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| 306 | <varlistentry id="btrfs-prog">
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| 307 | <term><command>btrfs</command></term>
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| 308 | <listitem>
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| 309 | <para>
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| 310 | is the main interface into btrfs filesystem operations
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| 311 | </para>
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| 312 | <indexterm zone="btrfs-progs btrfs-prog">
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| 313 | <primary sortas="b-btrfs">btrfs</primary>
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| 314 | </indexterm>
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| 315 | </listitem>
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| 316 | </varlistentry>
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| 317 |
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| 318 | <varlistentry id="btrfs-convert">
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| 319 | <term><command>btrfs-convert</command></term>
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| 320 | <listitem>
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| 321 | <para>
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| 322 | converts from an ext2/3/4 or reiserfs filesystem to btrfs (see
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| 323 | <xref linkend="using-btrfs-convert"/> above)
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| 324 | </para>
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| 325 | <indexterm zone="btrfs-progs btrfs-convert">
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| 326 | <primary sortas="b-btrfs-convert">btrfs-convert</primary>
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| 327 | </indexterm>
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| 328 | </listitem>
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| 329 | </varlistentry>
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| 330 |
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| 331 | <varlistentry id="btrfs-find-root">
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| 332 | <term><command>btrfs-find-root</command></term>
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| 333 | <listitem>
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| 334 | <para>
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| 335 | is a filter to find btrfs root
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| 336 | </para>
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| 337 | <indexterm zone="btrfs-progs btrfs-find-root">
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| 338 | <primary sortas="b-btrfs-find-root">btrfs-find-root</primary>
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| 339 | </indexterm>
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| 340 | </listitem>
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| 341 | </varlistentry>
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| 342 |
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| 343 | <varlistentry id="btrfs-map-logical">
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| 344 | <term><command>btrfs-map-logical</command></term>
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| 345 | <listitem>
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| 346 | <para>
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| 347 | maps btrfs logical extent to physical extent
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| 348 | </para>
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| 349 | <indexterm zone="btrfs-progs btrfs-map-logical">
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| 350 | <primary sortas="b-btrfs-map-logical">btrfs-map-logical</primary>
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| 351 | </indexterm>
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| 352 | </listitem>
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| 353 | </varlistentry>
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| 354 |
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| 355 | <varlistentry id="btrfs-select-super">
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| 356 | <term><command>btrfs-select-super</command></term>
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| 357 | <listitem>
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| 358 | <para>
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| 359 | overwrites the primary superblock with a backup copy
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| 360 | </para>
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| 361 | <indexterm zone="btrfs-progs btrfs-select-super">
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| 362 | <primary sortas="b-btrfs-select-super">btrfs-select-super</primary>
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| 363 | </indexterm>
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| 364 | </listitem>
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| 365 | </varlistentry>
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| 366 |
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| 367 | <varlistentry id="btrfstune">
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| 368 | <term><command>btrfstune</command></term>
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| 369 | <listitem>
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| 370 | <para>
|
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| 371 | tunes various filesystem parameters
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| 372 | </para>
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| 373 | <indexterm zone="btrfs-progs btrfstune">
|
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| 374 | <primary sortas="b-btrfstune">btrfstune</primary>
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| 375 | </indexterm>
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| 376 | </listitem>
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| 377 | </varlistentry>
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| 378 |
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| 379 | <varlistentry id="fsck.btrfs">
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| 380 | <term><command>fsck.btrfs</command></term>
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| 381 | <listitem>
|
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| 382 | <para>
|
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| 383 | does nothing, but is present for consistency with fstab
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| 384 | </para>
|
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| 385 | <indexterm zone="btrfs-progs fsck.btrfs">
|
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| 386 | <primary sortas="b-fsck.btrfs">fsck.btrfs</primary>
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| 387 | </indexterm>
|
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| 388 | </listitem>
|
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| 389 | </varlistentry>
|
|---|
| 390 |
|
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| 391 | <varlistentry id="mkfs.btrfs">
|
|---|
| 392 | <term><command>mkfs.btrfs</command></term>
|
|---|
| 393 | <listitem>
|
|---|
| 394 | <para>
|
|---|
| 395 | creates a btrfs file system
|
|---|
| 396 | </para>
|
|---|
| 397 | <indexterm zone="btrfs-progs mkfs.btrfs">
|
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| 398 | <primary sortas="b-mkfs.btrfs">mkfs.btrfs</primary>
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| 399 | </indexterm>
|
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| 400 | </listitem>
|
|---|
| 401 | </varlistentry>
|
|---|
| 402 |
|
|---|
| 403 | </variablelist>
|
|---|
| 404 |
|
|---|
| 405 | </sect2>
|
|---|
| 406 |
|
|---|
| 407 | </sect1>
|
|---|
