From c975dd469d748ce619c510050d4fb407c2398591 Mon Sep 17 00:00:00 2001 From: Stefan Behrens Date: Tue, 1 Nov 2011 17:06:04 +0100 Subject: [PATCH] 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 --- fs/btrfs/Kconfig | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/fs/btrfs/Kconfig b/fs/btrfs/Kconfig index ecb9fd3be14..d33f01c08b6 100644 --- a/fs/btrfs/Kconfig +++ b/fs/btrfs/Kconfig @@ -31,3 +31,22 @@ config BTRFS_FS_POSIX_ACL Linux website . 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