qemu: don't use chardev FD passing for vhostuser backend

QEMU chardevs have a bug which makes the vhostuser backend complain
about lack of support for FD passing when validating the chardev.
While this is ultimately QEMU's responsibility to fix, libvirt needs to
avoid tickling the bug.

Simply disabling chardev FD passing just for vhostuser's chardev is
the most prudent approach, avoiding need for a QEMU version number
check.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 63c7ac0f82befa66fecc3c3c43a1eec968f91f25..82d8030a33f839ff7e3beb487ace7b23d082a4a4 100644 (file)
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -4939,6 +4939,7 @@ qemuOpenChrChardevUNIXSocket(const virDomainChrSourceDef *dev)
 enum {
     QEMU_BUILD_CHARDEV_TCP_NOWAIT = (1 << 0),
     QEMU_BUILD_CHARDEV_FILE_LOGD  = (1 << 1),
+    QEMU_BUILD_CHARDEV_UNIX_FD_PASS = (1 << 2),
 };
 
 /* This function outputs a -chardev command line option which describes only the
@@ -5082,7 +5083,8 @@ qemuBuildChrChardevStr(virLogManagerPtr logManager,
         break;
 
     case VIR_DOMAIN_CHR_TYPE_UNIX:
-        if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_CHARDEV_FD_PASS)) {
+        if ((flags & QEMU_BUILD_CHARDEV_UNIX_FD_PASS) &&
+            virQEMUCapsGet(qemuCaps, QEMU_CAPS_CHARDEV_FD_PASS)) {
             if (qemuSecuritySetSocketLabel(secManager, (virDomainDefPtr)def) < 0)
                 goto cleanup;
             int fd = qemuOpenChrChardevUNIXSocket(dev);
@@ -5438,7 +5440,8 @@ qemuBuildMonitorCommandLine(virLogManagerPtr logManager,
                             qemuDomainObjPrivatePtr priv)
 {
     char *chrdev;
-    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT;
+    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT |
+        QEMU_BUILD_CHARDEV_UNIX_FD_PASS;
     if (priv->chardevStdioLogd)
         cdevflags |= QEMU_BUILD_CHARDEV_FILE_LOGD;
 
@@ -5573,7 +5576,8 @@ qemuBuildRNGBackendChrdevStr(virLogManagerPtr logManager,
                              char **chr,
                              bool chardevStdioLogd)
 {
-    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT;
+    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT |
+        QEMU_BUILD_CHARDEV_UNIX_FD_PASS;
     if (chardevStdioLogd)
         cdevflags |= QEMU_BUILD_CHARDEV_FILE_LOGD;
     *chr = NULL;
@@ -8712,7 +8716,8 @@ qemuBuildSmartcardCommandLine(virLogManagerPtr logManager,
     virBuffer opt = VIR_BUFFER_INITIALIZER;
     const char *database;
     const char *contAlias = NULL;
-    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT;
+    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT |
+        QEMU_BUILD_CHARDEV_UNIX_FD_PASS;
     if (chardevStdioLogd)
         cdevflags |= QEMU_BUILD_CHARDEV_FILE_LOGD;
 
@@ -8948,7 +8953,8 @@ qemuBuildShmemCommandLine(virLogManagerPtr logManager,
     virBuffer buf = VIR_BUFFER_INITIALIZER;
     char *devstr = NULL;
     int rc;
-    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT;
+    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT |
+        QEMU_BUILD_CHARDEV_UNIX_FD_PASS;
     if (chardevStdioLogd)
         cdevflags |= QEMU_BUILD_CHARDEV_FILE_LOGD;
 
@@ -9108,7 +9114,8 @@ qemuBuildSerialCommandLine(virLogManagerPtr logManager,
 {
     size_t i;
     bool havespice = false;
-    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT;
+    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT |
+        QEMU_BUILD_CHARDEV_UNIX_FD_PASS;
     if (chardevStdioLogd)
         cdevflags |= QEMU_BUILD_CHARDEV_FILE_LOGD;
 
@@ -9171,7 +9178,8 @@ qemuBuildParallelsCommandLine(virLogManagerPtr logManager,
                               bool chardevStdioLogd)
 {
     size_t i;
-    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT;
+    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT |
+        QEMU_BUILD_CHARDEV_UNIX_FD_PASS;
     if (chardevStdioLogd)
         cdevflags |= QEMU_BUILD_CHARDEV_FILE_LOGD;
 
@@ -9208,7 +9216,8 @@ qemuBuildChannelsCommandLine(virLogManagerPtr logManager,
                              bool chardevStdioLogd)
 {
     size_t i;
-    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT;
+    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT |
+        QEMU_BUILD_CHARDEV_UNIX_FD_PASS;
     if (chardevStdioLogd)
         cdevflags |= QEMU_BUILD_CHARDEV_FILE_LOGD;
 
@@ -9265,7 +9274,8 @@ qemuBuildConsoleCommandLine(virLogManagerPtr logManager,
                             bool chardevStdioLogd)
 {
     size_t i;
-    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT;
+    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT |
+        QEMU_BUILD_CHARDEV_UNIX_FD_PASS;
     if (chardevStdioLogd)
         cdevflags |= QEMU_BUILD_CHARDEV_FILE_LOGD;
 
@@ -9445,7 +9455,8 @@ qemuBuildRedirdevCommandLine(virLogManagerPtr logManager,
                              bool chardevStdioLogd)
 {
     size_t i;
-    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT;
+    unsigned int cdevflags = QEMU_BUILD_CHARDEV_TCP_NOWAIT |
+        QEMU_BUILD_CHARDEV_UNIX_FD_PASS;
     if (chardevStdioLogd)
         cdevflags |= QEMU_BUILD_CHARDEV_FILE_LOGD;
 

diff --git a/tests/qemuxml2argvdata/net-vhostuser.args b/tests/qemuxml2argvdata/net-vhostuser.args
index fc4557a1f2476d5e4f546d566756410f713c40a4..513fc535ab2253c0176e4e8a37ac54f799cadc6c 100644 (file)
--- a/tests/qemuxml2argvdata/net-vhostuser.args
+++ b/tests/qemuxml2argvdata/net-vhostuser.args
@@ -14,8 +14,7 @@ QEMU_AUDIO_DRV=none \
 -display none \
 -no-user-config \
 -nodefaults \
--chardev socket,id=charmonitor,path=/tmp/lib/domain--1-QEMUGuest1/monitor.sock,\
-server,nowait \
+-chardev socket,id=charmonitor,fd=1729,server,nowait \
 -mon chardev=charmonitor,id=monitor,mode=control \
 -rtc base=utc \
 -no-shutdown \

diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index d6911f934473b395ff94c764d4be73e142122ab9..2d52f352b042ec16b07ccc75e34110bb0a13a773 100644 (file)
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1266,7 +1266,7 @@ mymain(void)
     DO_TEST("misc-no-reboot", NONE);
     DO_TEST("misc-uuid", NONE);
     DO_TEST_PARSE_ERROR("vhost_queues-invalid", NONE);
-    DO_TEST("net-vhostuser", NONE);
+    DO_TEST("net-vhostuser", QEMU_CAPS_CHARDEV_FD_PASS);
     DO_TEST("net-vhostuser-multiq",
             QEMU_CAPS_VHOSTUSER_MULTIQUEUE);
     DO_TEST_FAILURE("net-vhostuser-multiq", NONE);