jgfs2

jgfs2 is intended to be a modern, but relatively simple, filesystem based on some of the positive design aspects of btrfs. In particular, jgfs2 borrows the concept of using a single tree for all filesystem metadata from btrfs; however, jgfs2 has no copy-on-write functionality, and uses B+ trees, as contrasted with btrfs's modified B-trees.

The primary purpose of jgfs2 is to provide a relatively modern, but not overly complicated, filesystem for use with the justix operating system project.

status

jgfs2 is currently under heavy development and is not yet suitable for use.

building

This project uses Avery Pennarun's implementation of D. J. Bernstein's redo build system. For more information, see [djb's redo page][1] and [apenwarr's redo implementation][2].

To build libjgfs2, the FUSE program, and associated utilities, install redo and simply run redo all. To clean the project directory, run redo clean.

To build individual targets, run one of the following:

• redo lib: build the libjgfs2 library, bin/libjgfs2.a
• redo test: build the unit test utility, bin/test.jgfs2
• redo tree: build the tree viewer utility, bin/tree.jgfs2
• redo fuse: build the FUSE program, bin/fuse.jgfs2
• redo mkfs: build the mkfs utility, bin/mkfs.jgfs2
• redo fsck: build the fsck utility, bin/fsck.jgfs2
• redo defrag: build the defrag utility, bin/defrag.jgfs2
• redo fsctl: build the filesystem control utility, bin/fsctl.jgfs2
• redo attr: build the file attribute utility, bin/attr.jgfs2

running

Make a new jgfs2 filesystem on a device or file:

bin/mkfs.jgfs2 <device>

Mount the filesystem using FUSE:

bin/fuse.jgfs2 <device> <mountpoint>

directories

• bin: contains the libjgfs2 library and utility binaries after a build
• doc: documentation related to the filesystem's development
• lib: source code for libjgfs2
• src: source code for jgfs2 utilities and the FUSE program
• test: various scripts used for testing the filesystem

license

This project is licensed under the terms of the simplified (2-clause) BSD license. For more information, see the LICENSE file contained in the project's root directory.