[libvirt PATCH 4/4] qemu: virtiofs: use a .log.fs suffix for logs

[Daniel P. Berrangé]

On Mon, Mar 23, 2020 at 06:18:27PM +0100, Ján Tomko wrote:
> On a Monday in 2020, Daniel P. Berrangé wrote:
> > On Mon, Mar 23, 2020 at 05:10:37PM +0100, Ján Tomko wrote:
> > > As Dave pointed out, someone creative might name a domain
> > > to make its logfile conflict with a logfile of another
> > > domain's virtiofsd log.
> > > 
> > > Signed-off-by: Ján Tomko <jtomko at redhat.com>
> > > Reported-by: Dr. David Alan Gilbert <dgilbert at redhat.com>
> > > ---
> > >  src/qemu/qemu_virtiofs.c | 4 ++--
> > >  1 file changed, 2 insertions(+), 2 deletions(-)
> > > 
> > > diff --git a/src/qemu/qemu_virtiofs.c b/src/qemu/qemu_virtiofs.c
> > > index aaa25bcbb8..575b47fd74 100644
> > > --- a/src/qemu/qemu_virtiofs.c
> > > +++ b/src/qemu/qemu_virtiofs.c
> > > @@ -67,9 +67,9 @@ qemuVirtioFSCreateLogFilename(virQEMUDriverConfigPtr cfg,
> > >  {
> > >      g_autofree char *name = NULL;
> > > 
> > > -    name = g_strdup_printf("%s-%s", def->name, alias);
> > > +    name = g_strdup_printf("%s-%s.log.fs", def->name, alias);
> > 
> > Having a logfile that doesn't end in  ".log" is pretty gross IMHO
> 
> Agreed.
> 
> > and will mean it isn't caught by logrotate matching *.log
> 
> I did not realize that.
> 
> > 
> > Can't we deal with the clash in another way that preserves .log  as a
> > suffix
> 
> Not in the same directory, but I can create a separate directory,
> something like:
> /var/log/libvirt/qemu/vhost-user/%{name}-fs-%{alias}.log
> /var/log/libvirt/qemu/devices/%{name}-fs-%{alias}.log
> /var/log/libvirt/qemu/fs/%{name}-%{alias}.log


Yeah, a separate directory looks like the easy option unless we want
to get into a game of escaping names which is probably more trouble
than it is worth.


Regards,
Daniel
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