Ceph

I've been trying to find out whether this is still a problem or
if it was transient. But teuthology has had a string of
somewhat flaky results in the past week and I haven't quickly
found evidence of the the rbd.xfstests task even running.

The message reported here is a result of this block of code:

if ! src/xfsctl $SCRATCH_MNT $SCRATCH_MNT/fish >>$seq.full 2>&1
    then
        echo "!!! failed to run xfsctl test program" 
        exit
    fi

The program "src/xfsctl" is a program found under the xfstests
directory, which gets installed for this test in /var/lib/xfstests.
The message would get displayed (and put the error output into the
"full" output file) if the program didn't exist, or if it did
exist but produced a non-zero exit code. The only way to tell
the difference would be to look at the "full" output file, which
at this point we do not save.

If something went wrong with the build stage of the xfstests then
the program might not exist.

If the program existed and ran, it could fail with non-zero status
if any of these occurred:
- open(${SCRATCH_MNT}, O_RDONLY) failed
- open(${SCRATCH_MNT}/fish, O_RDONLY) failed
- Any of the xfsctl() functions the test exercises produced an error

In any case, right now I just want to know whether we can close this
bug because it has disappeared. I will check back again later after
I get a little help with reviewing teuthology output.