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authorStefan Behrens <sbehrens@giantdisaster.de>2011-11-01 17:06:04 +0100
committerStefan Behrens <sbehrens@giantdisaster.de>2011-12-21 19:14:16 +0100
commitc975dd469d748ce619c510050d4fb407c2398591 (patch)
tree32d8e10eb8599d2b72171e410c41082f1d7dcc5b /fs/btrfs/Kconfig
parent5db0276014b80484689eb6c1bf7b94af1c7d5b1a (diff)
downloadlinux-c975dd469d748ce619c510050d4fb407c2398591.tar.bz2
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>
Diffstat (limited to 'fs/btrfs/Kconfig')
-rw-r--r--fs/btrfs/Kconfig19
1 files changed, 19 insertions, 0 deletions
diff --git a/fs/btrfs/Kconfig b/fs/btrfs/Kconfig
index ecb9fd3be143..d33f01c08b60 100644
--- a/fs/btrfs/Kconfig
+++ b/fs/btrfs/Kconfig
@@ -31,3 +31,22 @@ config BTRFS_FS_POSIX_ACL
Linux website <http://acl.bestbits.at/>.
If you don't know what Access Control Lists are, say N
+
+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