diff options
| author | Josef Bacik | 2015-03-20 15:50:37 +0100 |
|---|---|---|
| committer | Mike Snitzer | 2015-04-15 18:10:24 +0200 |
| commit | 0e9cebe724597a76ab1b0ebc0a21e16f7db11b47 (patch) | |
| tree | 8217c6cea86697a985a7f88ff4240bb93277db84 /drivers/md/Kconfig | |
| parent | dm table: use bool function return values of true/false not 1/0 (diff) | |
| download | kernel-qcow2-linux-0e9cebe724597a76ab1b0ebc0a21e16f7db11b47.tar.gz kernel-qcow2-linux-0e9cebe724597a76ab1b0ebc0a21e16f7db11b47.tar.xz kernel-qcow2-linux-0e9cebe724597a76ab1b0ebc0a21e16f7db11b47.zip | |
dm: add log writes target
Introduce a new target that is meant for file system developers to test file
system integrity at particular points in the life of a file system. We capture
all write requests and associated data and log them to a separate device
for later replay. There is a userspace utility to do this replay. The
idea behind this is to give file system developers a tool to verify that
the file system is always consistent.
Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Zach Brown <zab@zabbo.net>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/Kconfig')
| -rw-r--r-- | drivers/md/Kconfig | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index 109f9dcc9cab..6ddc983417d5 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -443,4 +443,20 @@ config DM_SWITCH If unsure, say N. +config DM_LOG_WRITES + tristate "Log writes target support" + depends on BLK_DEV_DM + ---help--- + This device-mapper target takes two devices, one device to use + normally, one to log all write operations done to the first device. + This is for use by file system developers wishing to verify that + their fs is writing a consitent file system at all times by allowing + them to replay the log in a variety of ways and to check the + contents. + + To compile this code as a module, choose M here: the module will + be called dm-log-writes. + + If unsure, say N. + endif # MD |