dm: add log writes target

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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>

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Josef Bacik 2015-03-20 10:50:37 -04:00 • committed by Mike Snitzer

parent 7f61f5a022

commit 0e9cebe724

4 changed files with 982 additions and 0 deletions

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140

Documentation/device-mapper/log-writes.txt

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16

drivers/md/Kconfig

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1

drivers/md/Makefile

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825

drivers/md/dm-log-writes.c

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