-Install Instructions
+Installation instructions
+=========================
-Btrfs uses libcrc32c in the kernel for file and metadata checksums. You need
-to compile the kernel with:
+The Btrfs utility programs require the following libraries/tools to build:
-CONFIG_LIBCRC32C=m
+- libuuid - provided by util-linux, e2fsprogs/e2fslibs or libuuid
+- libblkid - block device id library
+- liblzo2 - LZO data compression library
+- zlib - ZLIB data compression library
+- libzstd - ZSTD data compression library version >= 1.0.0
-libcrc32c can be static as well. Once your kernel is setup, typing make in the
-btrfs module sources will build against the running kernel. When the build is
-complete:
+For the btrfs-convert utility:
-modprobe libcrc32c
-insmod btrfs.ko
+- e2fsprogs - ext2/ext3/ext4 file system libraries, or called e2fslibs
+- libreiserfscore - reiserfs file system library version >= 3.6.27
-The Btrfs utility programs require the following libraries/tools to build:
+Generating documentation:
+
+- asciidoc - text document format tool
+- xmlto - text document format tool
+
+XATTR library should be provided by the standard C library or by
+
+- libattr - extended attribute library
+
+Please note that the package names may differ according to the distribution.
+See https://btrfs.wiki.kernel.org/index.php/Btrfs_source_repositories#Dependencies .
+
+
+Building from sources
+---------------------
+
+To build from git sources you need to generate the configure script using the
+autotools:
+
+ $ ./autogen.sh
+
+To build from the released tarballs:
+
+ $ ./configure
+ $ make
+ $ make install
+
+To install the libbtrfsutil Python bindings:
-- libuuid (This can be found in the e2fsprogs sources, and is usually available
- as libuuid or e2fsprogs-devel from various distros).
-- libattr (Extended attribute library - Development files)
-- libblkid (Block device id library - Development files)
-- liblzo2 (LZO data compression library - Development files)
-- libacl (Access control list library - Development files)
-- e2fslibs (ext2/ext3/ext4 file system libraries - Development files)
-- asciidoc (Text document format tool - For documentation)
+ $ make install_python
-Building the utilities is just make ; make install. The programs go
-into /usr/local/bin. The mains commands available are:
+You may disable building some parts like documentation, btrfs-convert or
+backtrace support. See ./configure --help for more.
-mkfs.btrfs: create a filesystem
+Specific CFLAGS or LDFLAGS should be set like
-btrfs: control program to create snapshots and subvolumes:
- # mount a btrfs filesystem
- mount /dev/sda2 /mnt
+ $ CFLAGS=... LDFLAGS=... ./configure --prefix=/usr
- # create a subvolume
- btrfs subvolume create /mnt/new_subvol_name
+and not as arguments to make. You can specify additional flags to build via
+variables EXTRA_CFLAGS and EXTRA_LDFLAGS that get appended to the predefined
+values of the respective variables. There are further build tuning options
+documented in the Makefile.
- # snapshot of a subvolume
- btrfs subvolume snapshot /mnt/default /mnt/snapshot_of_default
- btrfs subvolume snapshot /mnt/snapshot_of_default \
- /mnt/snapshot_of_a_snapshot
+ $ make EXTRA_CFLAGS=-ggdb3
- # list of the subvolumes
- ls /mnt
- default snapshot_of_a_snapshot snapshot_of_new_subvol
- new_subvol_name snapshot_of_default
+The build utilizes autotools, dependencies for generating the configure
+scripts are:
- # removal of a subvolume or a snapshot
- btrfs subvolume delete /mn/snapshot_of_a_snapshot
+* autconf, autoheader
+* automake, aclocal
+* pkg-config
- # look a the btrfs man page for further information
- man btrfs
-btrfsck: do a limited check of the FS extent trees.</li>
+Statically built binaries
+-------------------------
-btrfs-debug-tree: print all of the FS metadata in text form. Example:
+The makefiles are ready to let you build static binaries of the utilities. This
+may be handy in rescue environments. Your system has to provide static version
+of the libraries.
- btrfs-debug-tree /dev/sda2 >& big_output_file
+ $ make static
+ $ make btrfs.static
+ $ make btrfs-convert.static
+The resulting binaries have the '.static' suffix, the intermediate object
+files do not conflict with the normal (dynamic) build.
+References:
+* https://btrfs.wiki.kernel.org
projects / platform / upstream / btrfs-progs.git / blobdiff