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

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On 23. 3. 2020 17:10, 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@xxxxxxxxxx>
> Reported-by: Dr. David Alan Gilbert <dgilbert@xxxxxxxxxx>
> ---
>  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);
>  
> -    return virFileBuildPath(cfg->logDir, name, "-virtiofsd.log");
> +    return virFileBuildPath(cfg->logDir, name, NULL);
>  }
>  
>  
> 

Why not go with virDomainDefGetShortName() then? Using def->name to name
a file is dangerous anyways. Oh, is it because we want to keep the same
log name across domain cold reboots?

Michal





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