When I run "./check -overlay generic/530", it failed with following log
```
generic/530 1s ... - output mismatch (see
/root/xfstests/results//generic/530.out.bad)
--- tests/generic/530.out 2019-05-07 16:18:55.951796117 +0800
+++ /root/xfstests/results//generic/530.out.bad 2019-05-08
14:55:30.976816701 +0800
@@ -1,2 +1,3 @@
QA output created by 530
+shutdown: Inappropriate ioctl for device
silence is golden
...
```
xfstests version: 1.1.1.1
kernel: linux 4.19
the commit that imports generic/530: e6703b90
https://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git/commit/?id=e6703b903a5025b3eccac758f5bdd8e847f62c39
I find that the error is due to the following snippet in
src/t_open_tmpfiles.c
```c
ret = ioctl(min_fd, XFS_IOC_GOINGDOWN, &flag);
if (ret) {
perror("shutdown");
exit(2);
}
```
XFS_IOC_GOINGDOWN is specifically defined in XFS filesystem, while it is
not
supported in overlay filesystem.
In my understanding, test cases in "tests/generic" should be generic for
all
filesystem types, and the XFS_IOC_GOINGDOWN macro used by generic/530 is
obviously against this rule. Or maybe I missed something important and
would
approciate if someone could give me some indication.
thx
