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

On 11/02/2011 12:57 PM, Guido Günther wrote:
Built fine on most Debian architectures:


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 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:


+++ 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) {
+            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 redhat com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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