On 11/02/2011 02:57 PM, Guido Günther wrote: 
On Mon, Oct 31, 2011 at 05:51:55PM +0800, Daniel Veillard wrote:

  We are now entering the freeze for libvirt-0.9.7 .
We may make an exception for patch set which got a few round of reviews
though, like Stefan's ones (v4 IIRC), and anything which we know may
need fixing in the API before the release.

I have made a release candidate 1 tarball (and associated rpms) at
   ftp://libvirt.org/libvirt/libvirt-0.9.7-rc1.tar.gz

I think I will make an rc2 on Wed or Thu and then try to
make the release around Friday of the end of the week if things
looks good.

  Please give it a try !

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.
Cheers,
 -- Guido


--
libvir-list mailing list
libvir-list@redhat.com
https://www.redhat.com/mailman/listinfo/libvir-list
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:

 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
---
 tests/virnetsockettest.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/tests/virnetsockettest.c b/tests/virnetsockettest.c
index 1b88605..d7c0c4f 100644
--- a/tests/virnetsockettest.c
+++ 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;
         }
     } else {
         if (virAsprintf(&path, "%s/%s-test.sock", abs_builddir, progname) < 0) {
             virReportOOMError();
+            ret = EXIT_AM_SKIP;
             goto cleanup;
         }
     }
@@ -254,11 +256,13 @@ static int testSocketUNIXAddrs(const void *data ATTRIBUTE_UNUSED)
     if (progname[0] == '/') {
         if (virAsprintf(&path, "%s-test.sock", progname) < 0) {
             virReportOOMError();
+            ret = EXIT_AM_SKIP;
             goto cleanup;
         }
     } else {
         if (virAsprintf(&path, "%s/%s-test.sock", abs_builddir, progname) < 0) {
             virReportOOMError();
+            ret = EXIT_AM_SKIP;
             goto cleanup;
         }
     }
--
This patch is not correct. The code is failing further below when calling virNetSocketNewListenUNIX. I am surprised if this makes it work for your test env since it shouldn't run out of memory there.
The problem is obviously that the path exceeds 108 (UNIX_PATH_MAX) characters, the max. for the UnixIO socket path. The solution may either be to fall back to a path in /tmp (but why not do this always then) or to cut down the progname + abs_builddir pair to a max of ~97 chars or to try to build in a shorter path...

Maybe the following one works:

diff --git a/tests/virnetsockettest.c b/tests/virnetsockettest.c
index 6320ce0..b5c14a1 100644
--- a/tests/virnetsockettest.c
+++ b/tests/virnetsockettest.c
@@ -25,6 +25,9 @@
 #ifdef HAVE_IFADDRS_H
 # include <ifaddrs.h>
 #endif
+#ifndef WIN32
+# include <sys/un.h>
+#endif
 
 #include "testutils.h"
 #include "util.h"
@@ -200,6 +203,8 @@ static int testSocketUNIXAccept(const void *data ATTRIBUTE_UNUSED)
     virNetSocketPtr ssock = NULL; /* Server socket */
     virNetSocketPtr csock = NULL; /* Client socket */
     int ret = -1;
+    int tmpfd = -1;
+    struct sockaddr_un sun;
 
     char *path;
     if (progname[0] == '/') {
@@ -214,6 +219,19 @@ static int testSocketUNIXAccept(const void *data ATTRIBUTE_UNUSED)
         }
     }
 
+    if (strlen(path) >= sizeof(sun.sun_path)) {
+        if (!virStrcpy(path, "/tmp/test.sock.XXXXXX", sizeof(sun.sun_path))) {
+            VIR_DEBUG("Unexpected error using virStrcpyStatic");
+            goto cleanup;
+        }
+        tmpfd = mkostemp(path, 0700);
+        if (tmpfd < 0) {
+            virReportSystemError(errno, "%s",
+                                 _("Failed to create temporary file"));
+            goto cleanup;
+        }
+    }
+
     if (virNetSocketNewListenUNIX(path, 0700, -1, getgid(), &lsock) < 0)
         goto cleanup;
 
@@ -236,6 +254,10 @@ static int testSocketUNIXAccept(const void *data ATTRIBUTE_UNUSED)
     ret = 0;
 
 cleanup:
+    if (tmpfd >= 0) {
+        unlink(path);
+        VIR_FORCE_CLOSE(tmpfd);
+    }
     VIR_FREE(path);
     virNetSocketFree(lsock);
     virNetSocketFree(ssock);
@@ -249,6 +271,8 @@ static int testSocketUNIXAddrs(const void *data ATTRIBUTE_UNUSED)
     virNetSocketPtr ssock = NULL; /* Server socket */
     virNetSocketPtr csock = NULL; /* Client socket */
     int ret = -1;
+    int tmpfd = -1;
+    struct sockaddr_un sun;
 
     char *path;
     if (progname[0] == '/') {
@@ -263,6 +287,19 @@ static int testSocketUNIXAddrs(const void *data ATTRIBUTE_UNUSED)
         }
     }
 
+    if (strlen(path) >= sizeof(sun.sun_path)) {
+        if (!virStrcpy(path, "/tmp/test.sock.XXXXXX", sizeof(sun.sun_path))) {
+            VIR_DEBUG("Unexpected error using virStrcpyStatic");
+            goto cleanup;
+        }
+        tmpfd = mkostemp(path, 0700);
+        if (tmpfd < 0) {
+            virReportSystemError(errno, "%s",
+                                 _("Failed to create temporary file"));
+            goto cleanup;
+        }
+    }
+
     if (virNetSocketNewListenUNIX(path, 0700, -1, getgid(), &lsock) < 0)
         goto cleanup;
 
@@ -313,6 +350,10 @@ static int testSocketUNIXAddrs(const void *data ATTRIBUTE_UNUSED)
     ret = 0;
 
 cleanup:
+    if (tmpfd >= 0) {
+        unlink(path);
+        VIR_FORCE_CLOSE(tmpfd);
+    }
     VIR_FREE(path);
     virNetSocketFree(lsock);
     virNetSocketFree(ssock);


     Stefan