The dm-log-writes infrastructure is currently implemented to use
SCRATCH_DEV as a hardcoded data device. In preparation to allow use
of specialized devices in certain circumstances, genericize the code
to allow an arbitrary data device. This requires passing the target
device as a parameter to several helper functions from various
tests. No functional changes.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
These have been scripted conversions then cleaned up by hand as
there was no consistency to the formatting of the license headers in
the common/ directory. Author information was also removed (it's in
the git history) and so now the header format is consistently:
##/bin/bash
# SPDX-License-Identifier: GPL-2.0(+)
# Copyright (c) <date> <owner>. All Rights Reserved.
#
# <file description>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Basic test case which triggers fsstress with dm-log-writes, and then
check the fs after each FUA writes.
With needed infrastructure and special handlers for journal based fs.
[Eryu: cap $nr_cpu to 8 to avoid wasting time on hosts with many cpus]
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
This test creates a file and writes to it via an mmap(), but never
syncs via fsync/msync. This process is tracked via dm-log-writes,
then replayed.
If MAP_SYNC is working the dm-log-writes replay will show the test
file with 1 MiB of on-media block allocations. This is because each
allocating page fault included an implicit metadata sync. If
MAP_SYNC isn't working (which you can test by removing the "-S" flag
to xfs_io mmap) the file will be smaller or missing entirely.
Note that dm-log-writes doesn't track the data that we write via the
mmap(), so we can't do any data integrity checking. We can only
verify that the metadata writes for the page faults happened.
[eguan: add comments on _require_log_writes_dax and fix its cleanup]
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
The 'replay-log' executable will replay the dm-log-writes log until
the given mark, or until the end of the log if the mark isn't found.
This means that if the mark you're looking for was never inserted in
the log or if you give garbage to _log_writes_replay_log() the
entire log will be replayed. This can cause unexpected test
results.
Fix this by making sure that the mark we're given actually exists in
the log before we allow the replay.
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
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>
Brian Foster
Xiao Yang
Dave Chinner
Qu Wenruo
Ross Zwisler
Amir Goldstein