tree 1b0397effc5c686a079f26eebe113a591953f5d9
parent b65b808ee3df0b35fc013ef959e59b99ed27aae1
author Amir Goldstein <amir73il@gmail.com> 1504778589 +0300
committer Eryu Guan <eguan@redhat.com> 1504952153 +0800

fstests: add support for working with dm-log-writes target

Cherry-picked the relevant common bits from commit 70d41e17164b
in Josef Bacik's fstests tree (https://github.com/josefbacik/fstests).
Quoting from Josef's commit message:

  This patch adds the supporting code for using the dm-log-writes
  target.  The dmlogwrites code is similar to the dmflakey code, it just
  gives us functions to build and tear down a dm-log-writes target.  We
  add a new LOGWRITES_DEV variable to take in the device we will use as
  the log and add checks for that.

[Amir:]
- Removed unneeded _test_falloc_support
- Moved _require_log_writes to dmlogwrites
- Document _require_log_writes
- Address review comments by Eryu Guan

Cc: Josef Bacik <jbacik@fb.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>