[libvirt] [PATCH 1/5] virt-aa-helper: Ignore open errors again

[Daniel P. Berrange]

On Tue, Jul 27, 2010 at 11:46:34AM +0200, Matthias Bolte wrote:
> 2010/7/26 Daniel P. Berrange <berrange at redhat.com>:
> > On Sat, Jul 24, 2010 at 12:28:11AM +0200, Jamie Strandboge wrote:
> >> On Fri, 2010-07-23 at 19:24 +0200, Matthias Bolte wrote:
> >> > virt-aa-helper used to ignore errors when opening files.
> >> > Commit a8853344994a7c6aaca882a5e949ab5536821ab5 refactored
> >> > the related code and changed this behavior. virt-aa-helper
> >> > didn't ignore open errors anymore and virt-aa-helper-test
> >> > fails.
> >> >
> >> > Make sure that virt-aa-helper ignores open errors again.
> >> > ---
> >> >  src/security/virt-aa-helper.c |    2 +-
> >> >  1 files changed, 1 insertions(+), 1 deletions(-)
> >> >
> >> > diff --git a/src/security/virt-aa-helper.c b/src/security/virt-aa-helper.c
> >> > index 521545d..16b1920 100644
> >> > --- a/src/security/virt-aa-helper.c
> >> > +++ b/src/security/virt-aa-helper.c
> >> > @@ -846,7 +846,7 @@ get_files(vahControl * ctl)
> >> >      for (i = 0; i < ctl->def->ndisks; i++) {
> >> >          int ret = virDomainDiskDefForeachPath(ctl->def->disks[i],
> >> >                                                ctl->allowDiskFormatProbing,
> >> > -                                              false,
> >> > +                                              true,
> >> >                                                add_file_path,
> >> >                                                &buf);
> >> >          if (ret != 0)
> >>
> >> I'm not 100% sure on this one. I have been developing patches to adjust
> >> for the new behavior on older releases and I did some shuffling to get
> >> this to work with 'false'. I'm not ready to submit at this time, and
> >> won't be able to get to it until the week after next. If this blocks
> >> Matthias' work, then feel free to commit and I'll post with a different
> >> patch if needed. Otherwise, we can wait.
> >
> > What is the scenario in which 'false' breaks things ? We use 'false' for
> > the selinux driver already. The problem with 'true' is that it means the
> > user will never see potentially important errors.
> >
> > Regards,
> > Daniel
> 
> Maybe it's a problem that's triggered by the test only.
> 
> Passing 'false' makes virt-aa-helper-test fail for tests that involve
> non-existing files:
> 
> $ ./virt-aa-helper-test
> FAIL: exited with '1'
>   create (non-existent disk):  '--dryrun -c -u
> libvirt-00000000-0000-0000-0000-0123456789ab':
> FAIL: exited with '1'
>   replace (non-existent disk):  '--dryrun -r -u
> libvirt-00000000-0000-0000-0000-0123456789ab':
> 
> Here's the command that virt-aa-helper-test executes for the first failing test:
> 
> $ LD_LIBRARY_PATH="../src/.libs/" ../src/virt-aa-helper --dryrun -c -u
> libvirt-00000000-0000-0000-0000-0123456789ab <
> /tmp/tmp.IFQ5dqTvp6/test.xml
> virt-aa-helper: warning: path does not exist, skipping file type checks
> virt-aa-helper: error: invalid VM definition

Hmm, this does look like a test script bug. It should at least touch
the files so they exist before running. If a real deployment you would
actually want these kind of error messages about non-existant files.


Daniel
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