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linux/fs/btrfs/Kconfig

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fs/Kconfig: move btrfs out Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-01-22 07:27:30 +00:00
config BTRFS_FS
btrfs: update kconfig title The Kconfig title does not make much sense after the cleanup of CONFIG_EXPERIMENTAL option, align the wording with other filesystems. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-19 11:50:59 +00:00
tristate "Btrfs filesystem support"
Btrfs: fix btrfs boot when compiled as built-in After the change titled "Btrfs: add support for inode properties", if btrfs was built-in the kernel (i.e. not as a module), it would cause a kernel panic, as reported recently by Fengguang: [ 2.024722] BUG: unable to handle kernel NULL pointer dereference at (null) [ 2.027814] IP: [<ffffffff81501594>] crc32c+0xc/0x6b [ 2.028684] PGD 0 [ 2.028684] Oops: 0000 [#1] SMP [ 2.028684] Modules linked in: [ 2.028684] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.13.0-rc7-04795-ga7b57c2 #1 [ 2.028684] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2.028684] task: ffff88000edba100 ti: ffff88000edd6000 task.ti: ffff88000edd6000 [ 2.028684] RIP: 0010:[<ffffffff81501594>] [<ffffffff81501594>] crc32c+0xc/0x6b [ 2.028684] RSP: 0000:ffff88000edd7e58 EFLAGS: 00010246 [ 2.028684] RAX: 0000000000000000 RBX: ffffffff82295550 RCX: 0000000000000000 [ 2.028684] RDX: 0000000000000011 RSI: ffffffff81efe393 RDI: 00000000fffffffe [ 2.028684] RBP: ffff88000edd7e60 R08: 0000000000000003 R09: 0000000000015d20 [ 2.028684] R10: ffffffff81ef225e R11: ffffffff811b0222 R12: ffffffffffffffff [ 2.028684] R13: 0000000000000239 R14: 0000000000000000 R15: 0000000000000000 [ 2.028684] FS: 0000000000000000(0000) GS:ffff88000fa00000(0000) knlGS:0000000000000000 [ 2.028684] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 2.028684] CR2: 0000000000000000 CR3: 000000000220c000 CR4: 00000000000006f0 [ 2.028684] Stack: [ 2.028684] ffffffff82295550 ffff88000edd7e80 ffffffff8238af62 ffffffff8238ac05 [ 2.028684] 0000000000000000 ffff88000edd7e98 ffffffff8238ac0f ffffffff8238ac05 [ 2.028684] ffff88000edd7f08 ffffffff810002ba ffff88000edd7f00 ffffffff810e2404 [ 2.028684] Call Trace: [ 2.028684] [<ffffffff8238af62>] btrfs_props_init+0x4f/0x96 [ 2.028684] [<ffffffff8238ac05>] ? ftrace_define_fields_btrfs_space_reservation+0x145/0x145 [ 2.028684] [<ffffffff8238ac0f>] init_btrfs_fs+0xa/0xf0 [ 2.028684] [<ffffffff8238ac05>] ? ftrace_define_fields_btrfs_space_reservation+0x145/0x145 [ 2.028684] [<ffffffff810002ba>] do_one_initcall+0xa4/0x13a [ 2.028684] [<ffffffff810e2404>] ? parse_args+0x25f/0x33d [ 2.028684] [<ffffffff8234cf75>] kernel_init_freeable+0x1aa/0x230 [ 2.028684] [<ffffffff8234c785>] ? do_early_param+0x88/0x88 [ 2.028684] [<ffffffff819f61b5>] ? rest_init+0x89/0x89 [ 2.028684] [<ffffffff819f61c3>] kernel_init+0xe/0x109 The issue here is that the initialization function of btrfs (super.c:init_btrfs_fs) started using crc32c (from lib/libcrc32c.c). But when it needs to call crc32c (as part of the properties initialization routine), the libcrc32c is not yet initialized, so crc32c derreferenced a NULL pointer (lib/libcrc32c.c:tfm), causing the kernel panic on boot. The approach to fix this is to use crypto component directly to use its crc32c (which is basically what lib/libcrc32c.c is, a wrapper around crypto). This is what ext4 is doing as well, it uses crypto directly to get crc32c functionality. Verified this works both when btrfs is built-in and when it's loadable kernel module. Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com>
2014-01-12 02:22:46 +00:00
select CRYPTO
select CRYPTO_CRC32C
fs/Kconfig: move btrfs out Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-01-22 07:27:30 +00:00
select ZLIB_INFLATE
select ZLIB_DEFLATE
btrfs: Add lzo compression support Lzo is a much faster compression algorithm than gzib, so would allow more users to enable transparent compression, and some users can choose from compression ratio and speed for different applications Usage: # mount -t btrfs -o compress[=<zlib,lzo>] dev /mnt or # mount -t btrfs -o compress-force[=<zlib,lzo>] dev /mnt "-o compress" without argument is still allowed for compatability. Compatibility: If we mount a filesystem with lzo compression, it will not be able be mounted in old kernels. One reason is, otherwise btrfs will directly dump compressed data, which sits in inline extent, to user. Performance: The test copied a linux source tarball (~400M) from an ext4 partition to the btrfs partition, and then extracted it. (time in second) lzo zlib nocompress copy: 10.6 21.7 14.9 extract: 70.1 94.4 66.6 (data size in MB) lzo zlib nocompress copy: 185.87 108.69 394.49 extract: 193.80 132.36 381.21 Changelog: v1 -> v2: - Select LZO_COMPRESS and LZO_DECOMPRESS in btrfs Kconfig. - Add incompability flag. - Fix error handling in compress code. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
2010-10-25 07:12:26 +00:00
select LZO_COMPRESS
select LZO_DECOMPRESS
Btrfs: RAID5 and RAID6 This builds on David Woodhouse's original Btrfs raid5/6 implementation. The code has changed quite a bit, blame Chris Mason for any bugs. Read/modify/write is done after the higher levels of the filesystem have prepared a given bio. This means the higher layers are not responsible for building full stripes, and they don't need to query for the topology of the extents that may get allocated during delayed allocation runs. It also means different files can easily share the same stripe. But, it does expose us to incorrect parity if we crash or lose power while doing a read/modify/write cycle. This will be addressed in a later commit. Scrub is unable to repair crc errors on raid5/6 chunks. Discard does not work on raid5/6 (yet) The stripe size is fixed at 64KiB per disk. This will be tunable in a later commit. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-01-29 23:40:14 +00:00
select RAID6_PQ
Btrfs: select XOR_BLOCKS in Kconfig The Btrfs raid56 uses the generic xor helpers. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-02-05 14:38:53 +00:00
select XOR_BLOCKS
Btrfs: RAID5 and RAID6 This builds on David Woodhouse's original Btrfs raid5/6 implementation. The code has changed quite a bit, blame Chris Mason for any bugs. Read/modify/write is done after the higher levels of the filesystem have prepared a given bio. This means the higher layers are not responsible for building full stripes, and they don't need to query for the topology of the extents that may get allocated during delayed allocation runs. It also means different files can easily share the same stripe. But, it does expose us to incorrect parity if we crash or lose power while doing a read/modify/write cycle. This will be addressed in a later commit. Scrub is unable to repair crc errors on raid5/6 chunks. Discard does not work on raid5/6 (yet) The stripe size is fixed at 64KiB per disk. This will be tunable in a later commit. Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-01-29 23:40:14 +00:00
fs/Kconfig: move btrfs out Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-01-22 07:27:30 +00:00
help
btrfs: update kconfig help text Reflect the current status. Portions of the text taken from the wiki pages. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-11-20 13:32:34 +00:00
Btrfs is a general purpose copy-on-write filesystem with extents,
writable snapshotting, support for multiple devices and many more
features focused on fault tolerance, repair and easy administration.
fs/Kconfig: move btrfs out Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-01-22 07:27:30 +00:00
btrfs: update kconfig help text Reflect the current status. Portions of the text taken from the wiki pages. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-11-20 13:32:34 +00:00
The filesystem disk format is no longer unstable, and it's not
expected to change unless there are strong reasons to do so. If there
is a format change, file systems with a unchanged format will
continue to be mountable and usable by newer kernels.
For more information, please see the web pages at
http://btrfs.wiki.kernel.org.
fs/Kconfig: move btrfs out Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-01-22 07:27:30 +00:00
To compile this file system support as a module, choose M here. The
module will be called btrfs.
If unsure, say N.
Btrfs: make btrfs acls selectable This patch adds a menu entry to kconfig to enable acls for btrfs. This allows you to enable FS_POSIX_ACL at kernel compile time. (updated by Jeff Mahoney to make the changes in fs/btrfs/Kconfig instead) Signed-off-by: Christian Hesse <mail@earthworm.de> Signed-off-by: Jeff Mahoney <jeffm@suse.com>
2009-02-04 14:28:28 +00:00
config BTRFS_FS_POSIX_ACL
bool "Btrfs POSIX Access Control Lists"
depends on BTRFS_FS
select FS_POSIX_ACL
help
POSIX Access Control Lists (ACLs) support permissions for users and
groups beyond the owner/group/world scheme.
To learn more about Access Control Lists, visit the POSIX ACLs for
Linux website <http://acl.bestbits.at/>.
If you don't know what Access Control Lists are, say N
Btrfs: add config option to enable btrfs integrity check Added the BTRFS_FS_CHECK_INTEGRITY option to Kconfig. It depends on BTRFS_FS. Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
2011-11-01 16:06:04 +00:00
config BTRFS_FS_CHECK_INTEGRITY
bool "Btrfs with integrity check tool compiled in (DANGEROUS)"
depends on BTRFS_FS
help
Adds code that examines all block write requests (including
writes of the super block). The goal is to verify that the
state of the filesystem on disk is always consistent, i.e.,
after a power-loss or kernel panic event the filesystem is
in a consistent state.
If the integrity check tool is included and activated in
the mount options, plenty of kernel memory is used, and
plenty of additional CPU cycles are spent. Enabling this
functionality is not intended for normal use.
In most cases, unless you are a btrfs developer who needs
to verify the integrity of (super)-block write requests
during the run of a regression test, say N
Btrfs: add some free space cache tests We keep hitting bugs in the tree log replay because btrfs_remove_free_space doesn't account for some corner case. So add a bunch of tests to try and fully test btrfs_remove_free_space since the only time it is called is during tree log replay. These tests all finish successfully, so as we find more of these bugs we need to add to these tests to make sure we don't regress in fixing things. I've hidden the tests behind a Kconfig option, but they take no time to run so all btrfs developers should have this turned on all the time. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-15 13:47:08 +00:00
config BTRFS_FS_RUN_SANITY_TESTS
bool "Btrfs will run sanity tests upon loading"
depends on BTRFS_FS
help
This will run some basic sanity tests on the free space cache
code to make sure it is acting as it should. These are mostly
Docs: Kconfig: `devlopers' -> `developers' Signed-off-by: Michael Witten <mfwitten@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-08-14 09:59:45 +00:00
regression tests and are only really interesting to btrfs
developers.
Btrfs: add some free space cache tests We keep hitting bugs in the tree log replay because btrfs_remove_free_space doesn't account for some corner case. So add a bunch of tests to try and fully test btrfs_remove_free_space since the only time it is called is during tree log replay. These tests all finish successfully, so as we find more of these bugs we need to add to these tests to make sure we don't regress in fixing things. I've hidden the tests behind a Kconfig option, but they take no time to run so all btrfs developers should have this turned on all the time. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-03-15 13:47:08 +00:00
If unsure, say N.
btrfs: move leak debug code to functions Clean up the leak debugging in extent_io.c by moving the debug code into functions. This also removes the list_heads used for debugging from the extent_buffer and extent_state structures when debug is not enabled. Since we need a global debug config to do that last part, implement CONFIG_BTRFS_DEBUG to accommodate. Thanks to Dave Sterba for the Kconfig bit. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
2013-04-22 16:12:31 +00:00
config BTRFS_DEBUG
bool "Btrfs debugging support"
depends on BTRFS_FS
help
Enable run-time debugging support for the btrfs filesystem. This may
enable additional and expensive checks with negative impact on
performance, or export extra information via sysfs.
If unsure, say N.
Btrfs: add support for asserts One of the complaints we get a lot is how many BUG_ON()'s we have. So to help with this I'm introducing a kconfig option to enable/disable a new ASSERT() mechanism much like what XFS does. This will allow us developers to still get our nice panics but allow users/distros to compile them out. With this we can go through and convert any BUG_ON()'s that we have to catch actual programming mistakes to the new ASSERT() and then fix everybody else to return errors. This will also allow developers to leave sanity checks in their new code to make sure we don't trip over problems while testing stuff and vetting new features. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-08-26 20:53:15 +00:00
config BTRFS_ASSERT
bool "Btrfs assert support"
depends on BTRFS_FS
help
Enable run-time assertion checking. This will result in panics if
any of the assertions trip. This is meant for btrfs developers only.
If unsure, say N.
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