Currently, users wishing to manage Btrfs filesystems programatically
have to shell out to btrfs-progs and parse the output. This isn't ideal.
The goal of libbtrfsutil is to provide a library version of as many of
the operations of btrfs-progs as possible and to migrate btrfs-progs to
use it.
Rather than simply refactoring the existing btrfs-progs code, the code
has to be written from scratch for a couple of reasons:
* A lot of the btrfs-progs code was not designed with a nice library API
in mind in terms of reusability, naming, and error reporting.
* libbtrfsutil is licensed under the LGPL, whereas btrfs-progs is under
the GPL, which makes it dubious to directly copy or move the code.
Eventually, most of the low-level btrfs-progs code should either live in
libbtrfsutil or the shared kernel/userspace filesystem code, and
btrfs-progs will just be the CLI wrapper.
This first commit just includes the build system changes, license,
README, and error reporting helper.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Move the testsuite to tests/ and make the tarball generation more
deterministic. As there could be many random temporary files left in the
test directories, we can't just copy them. Use 'git ls-tree' to
filter just what we want, this needs a slight extension of the file list
specification.
Signed-off-by: David Sterba <dsterba@suse.com>
Export the testsuite files to a separate tar. Since fsck tests depend
on btrfs-corrupt-block, and misc tests depends on both
btrfs-corrupt-block and fssum, so set it as prerequisites for package
commad.
Because, althougth fssum can be generated by source that are all in
tests directory, and has no rely on the btrfs's structure. But
btrfs-corrupt-block deeply relys on btrfs's structure. For consistency,
at the present stage, generete the two when create test tar.
Signed-off-by: Gu Jinxiang <gujx@cn.fujitsu.com>
[ applied without changes, the generated tarball will be different from
the one after the follow up commits ]
Signed-off-by: David Sterba <dsterba@suse.com>
The contents of tables.c hasn't changed for more than 15 years, we don't
expect any changes to current contents. New tables might be still added,
in that case the file should be regenerated using the included mktables
tool and updated.
Signed-off-by: David Sterba <dsterba@suse.com>
Use kernel RAID6 galois tables for later RAID6 recovery.
Galois tables file, kernel-lib/tables.c is generated by user space
program, mktable.
Galois field tables declaration, in kernel-lib/raid56.h, is completely
copied from kernel.
The mktables.c is copied from kernel with minor header/macro
modification, to ensure the generated tables.c works well in
btrfs-progs.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Copy from fstests, originally from
git://git.kernel.org/pub/scm/linux/kernel/git/arne/far-progs.git
Needs libcrypto to link but this check is now missing in configure.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: David Sterba <dsterba@suse.com>
It's not really necessary to configure and regenerate Makefiles in cases
like adding a new source file. The build environment and optional
features are not affected by that.
Signed-off-by: David Sterba <dsterba@suse.com>
While most guys are using ctags and cscope with vim, new completion tool
like vim-clang_completion is gaining its popularity, due to its compiler
level accuracy simpleness to use.
Since ctags and cscope are already in .gitignore, I see no reason to
reject .clang_complete.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Add a wrapper that sets up environment the same way a test would use it.
Use it for quick prototyping or testing, the commands and output is
logged.
Signed-off-by: David Sterba <dsterba@suse.com>
- add ./autogen.sh script (necessary after git clean/clone)
- add ./configure.ac
- copy autotool helper scripts from automake
- modify version.sh to be usable from the configure script
- rename Makefile to Makefile.in and use basic variables from configure.ac
Signed-off-by: Karel Zak <kzak@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
The old man page of btrfs will grow larger with new functions adding to
btrfs-progs and harder to maintain because the reader-unfriendly roff
grammar and one LARGE btrfs.in.
This patch will introduce the simplified Documentation directory mainly
'stolen' from git and include the first man page for 'btrfs(8)'.
This time, man page will be written in human-friendly asciidoc grammar
and each commands of btrfs will have a separate man page, which I hope
can reduce the effort to maintain the man page.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
There were a few problems that were breaking sparse checking:
- We were defining CHECK_ENDIAN late in the environment, after
linux/fs.h has been included which defines __force and __bitwise in
confusing ways that conflict with ours. Define it up with __CHECKER__
so that linux/fs.h and our copy are acting on the same input.
- We had manually set a few of gcc's internal defines to give to sparse.
It's easier to just ask gcc for all the defines it sets and hand those
to sparse.
- We weren't passing the same *FLAGS to sparse as we were to CC.
- glibc has so many errors with FORTIFY turned on that sparse gives up
and doesn't show us any errors from our code. It's a questionable
hack to always turn on FORTIFY ourselves, so we'll just not do that
when building with sparse.
And add a nice '[SP]' quiet output line for sparse checks.
Signed-off-by: Zach Brown <zab@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Some files don't compile because of insufficient prerequisite.
$ make btrfs
...
[CC] btrfs.o
btrfs.c:24:21: fatal error: version.h: No such file or directory
#include "version.h"
^
compilation terminated.
make: *** [btrfs.o] Error 1
Signed-off-by: Kusanagi Kouichi <slash@ac.auone-net.jp>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This tool draws per-chunk pngs representing the allocation map. A black
or colored dot means the block is allocated.
The output is written to a subdirectory, together with an index.html to be
viewed in a browser.
There are options to control whether color should be used and which block
group types should be printed.
To build, you need to have libpng and libgd installed. It is not part of
the 'all' target, so please build it explicitely with make btrfs-fragments.
A (rather untypical) example can be seen at
http://sensille.com/fragments
Please regard this as a first scratch version and feel free to improve it :)
Signed-off-by: Arne Jansen <sensille@gmx.net>
With the commit 002d021c (committed October 2011)
btrfsctl, btrfs-vol, btrfs-show were declared deprecated.
The last patches related to these commands are dated December 2010.
These tools are replaced by the "btrfs" tool in all the
functionality.
This commit removes all the related code.
Signed-off-by: Goffredo Baroncelli <kreijack@inwind.it>
Signed-off-by: David Sterba <dsterba@suse.cz>
Sometimes, when you least expect it, a static binary is what you need to
rescue your data... Or just get a good enough handle on things to make
it work again ;)
"make static" is a gift to you, dear user with filesystem problems!
Anyway, on a more serious note, changed the cflags and ldflags so that
we create a smaller binary, 1.1MB stripped on my 64 bit system
(2.7MB with debug data)
Signed-off-by: Ian Kumlien <pomac@demius.net>
Qu Wenruo
Omar Sandoval
David Sterba
Gu Jinxiang
Qu Wenruo
Satoru Takeuchi
David Sterba
Karel Zak
Zach Brown
Kusanagi Kouichi
Arne Jansen
Goffredo Baroncelli
Anand Jain
Ian Kumlien
Josef Bacik