[libvirt] Start of freeze for libvirt-0.9.7 and availability of rc1

[Eric Blake]

On 11/02/2011 12:57 PM, Guido Günther wrote:
> Built fine on most Debian architectures:
>
> 	https://buildd.debian.org/status/package.php?p=libvirt&suite=experimental
>
> The built failure on amd64 is due to virnetsockettest failing with:
>
>   5) Socket UNIX Accept... libvir: RPC error : Path /build/buildd-libvirt_0.9.7~rc1-1-amd64-EGXZTE/libvirt-0.9.7~rc1/debian/build/tests/virnetsockettest-test.sock too long for unix socket: Cannot allocate memory
>
> since the socket path doesn't fit in UNIX_PATH_MAX. Since exceeding the
> path shouldn't't be fatal I'm using the attached patch.

>
> From: =?UTF-8?q?Guido=20G=C3=BCnther?=<agx at sigxcpu.org>
> Date: Wed, 2 Nov 2011 19:02:42 +0100
> Subject: Skip socket test if we exceed UNIX_PATH_MAX.
>
> As seen on the amd64 buildd with:

s/buildd/build/

> +++ b/tests/virnetsockettest.c
> @@ -205,11 +205,13 @@ static int testSocketUNIXAccept(const void *data ATTRIBUTE_UNUSED)
>       if (progname[0] == '/') {
>           if (virAsprintf(&path, "%s-test.sock", progname)<  0) {
>               virReportOOMError();
> +            ret = EXIT_AM_SKIP;
>               goto cleanup;
>           }

Wrong place to be checking - virAsprintf() only fails on OOM (malloc 
failure), not on size fit, so your skip is unlikely to be hit.  I agree 
that it's okay to skip the test if run in a subdirectory so deep that a 
Unix socket cannot be created with a name that long, but that should be 
done strlen() check just before virNetSocketNewListenUNIX, not by 
looking for malloc failure.  And since we're most likely not out of 
memory, that may mean we also have a bug to fix in our error reporting 
quality within virNetSocketNewListenUNIX.

-- 
Eric Blake   eblake at redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org