[0/2] btrfs: dm-log-writes test for fstrim with fsstress

Message

Qu Wenruo Oct. 22, 2019, 7:58 a.m. UTC

Just to make sure the fstrim is not trimming anything vital (like tree
blocks still in use) on btrfs.

The first patch is to enhance log-writes to check each DISCARD
operation.
The feature is not used in test cases, as it's too time consuming.
But should be a pretty handy feature for small logwrites.

The second patch is the test case.
Which triggers fsstress and a loop of fstrim, all recorded by
dm-log-writes.
Then check each FLUSH after the 'prepare' mark.

The test case in theory can go generic, but I'm using various btrfs
specific hack to speed up the test and has a workaround to avoid false
alert.

So far I haven't triggered a bug.

Qu Wenruo (2):
  fstests: log-writes: Add new discard check point
  fstests: btrfs: dm-logwrites test for fstrim and fsstress workload

 src/log-writes/replay-log.c |  10 ++-
 tests/btrfs/197             | 131 ++++++++++++++++++++++++++++++++++++
 tests/btrfs/197.out         |   2 +
 tests/btrfs/group           |   1 +
 4 files changed, 142 insertions(+), 2 deletions(-)
 create mode 100755 tests/btrfs/197
 create mode 100644 tests/btrfs/197.out