Added QEMU driver config file

ChangeLog

+Fri Oct 12 12:05:53 EST 2007 Daniel P. Berrange <berrange@redhat.com>
+
+	* src/qemu_driver.c, src/qemu_conf.c, src/qemu_conf.h: Add a
+	/etc/libvirt/qemu.conf for storing system wide QEMU driver
+	default settings, such as VNC server options.
+
 Wed Oct 10 15:44:53 EST 2007 Daniel P. Berrange <berrange@redhat.com>
 
 	* src/qemu_driver.c: Reset migration source after failed attempt

src/qemu_conf.c

@@ -45,6 +45,7 @@
 #include "qemu_conf.h"
 #include "uuid.h"
 #include "buf.h"
+#include "conf.h"
 
 #define qemudLog(level, msg...) fprintf(stderr, msg)
 
@@ -66,6 +67,68 @@ void qemudReportError(virConnectPtr conn,
                     NULL, NULL, NULL, -1, -1, errorMessage);
 }
 
+int qemudLoadDriverConfig(struct qemud_driver *driver,
+                          const char *filename) {
+    virConfPtr conf;
+    virConfValuePtr p;
+
+    /* Setup 2 critical defaults */
+    strcpy(driver->vncListen, "127.0.0.1");
+    if (!(driver->vncTLSx509certdir = strdup(SYSCONF_DIR "/pki/libvirt-vnc"))) {
+        qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY,
+                         "vncTLSx509certdir");
+        return -1;
+    }
+
+    /* Just check the file is readable before opening it, otherwise
+     * libvirt emits an error.
+     */
+    if (access (filename, R_OK) == -1) return 0;
+
+    conf = virConfReadFile (filename);
+    if (!conf) return 0;
+
+
+#define CHECK_TYPE(name,typ) if (p && p->type != (typ)) {               \
+        qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,      \
+                         "remoteReadConfigFile: %s: %s: expected type " #typ "\n", \
+                         filename, (name));                             \
+        virConfFree(conf);                                              \
+        return -1;                                                      \
+    }
+
+    p = virConfGetValue (conf, "vnc_tls");
+    CHECK_TYPE ("vnc_tls", VIR_CONF_LONG);
+    if (p) driver->vncTLS = p->l;
+
+    p = virConfGetValue (conf, "vnc_tls_x509_verify");
+    CHECK_TYPE ("vnc_tls_x509_verify", VIR_CONF_LONG);
+    if (p) driver->vncTLSx509verify = p->l;
+
+    p = virConfGetValue (conf, "vnc_tls_x509_cert_dir");
+    CHECK_TYPE ("vnc_tls_x509_cert_dir", VIR_CONF_STRING);
+    if (p && p->str) {
+        free(driver->vncTLSx509certdir);
+        if (!(driver->vncTLSx509certdir = strdup(p->str))) {
+            qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY,
+                             "vncTLSx509certdir");
+            virConfFree(conf);
+            return -1;
+        }
+    }
+
+    p = virConfGetValue (conf, "vnc_listen");
+    CHECK_TYPE ("vnc_listen", VIR_CONF_STRING);
+    if (p && p->str) {
+        strncpy(driver->vncListen, p->str, sizeof(driver->vncListen));
+        driver->vncListen[sizeof(driver->vncListen)-1] = '\0';
+    }
+
+    virConfFree (conf);
+    return 0;
+}
+
+
 struct qemud_vm *qemudFindVMByID(const struct qemud_driver *driver, int id) {
     struct qemud_vm *vm = driver->vms;
 
@@ -1234,7 +1297,7 @@ static struct qemud_vm_def *qemudParseXML(virConnectPtr conn,
             if (vnclisten && *vnclisten)
                 strncpy(def->vncListen, (char *)vnclisten, BR_INET_ADDR_MAXLEN-1);
             else
-                strcpy(def->vncListen, "127.0.0.1");
+                strcpy(def->vncListen, driver->vncListen);
             def->vncListen[BR_INET_ADDR_MAXLEN-1] = '\0';
             xmlFree(vncport);
             xmlFree(vnclisten);
@@ -1750,15 +1813,30 @@ int qemudBuildCommandLine(virConnectPtr conn,
     }
 
     if (vm->def->graphicsType == QEMUD_GRAPHICS_VNC) {
-        char vncdisplay[BR_INET_ADDR_MAXLEN+20];
+        char vncdisplay[PATH_MAX];
         int ret;
-        if (vm->qemuCmdFlags & QEMUD_CMD_FLAG_VNC_COLON)
-            ret = snprintf(vncdisplay, sizeof(vncdisplay), "%s:%d",
+
+        if (vm->qemuCmdFlags & QEMUD_CMD_FLAG_VNC_COLON) {
+            char options[PATH_MAX] = "";
+            if (driver->vncTLS) {
+                strcat(options, ",tls");
+                if (driver->vncTLSx509verify) {
+                    strcat(options, ",x509verify=");
+                } else {
+                    strcat(options, ",x509=");
+                }
+                strncat(options, driver->vncTLSx509certdir,
+                        sizeof(options) - (strlen(driver->vncTLSx509certdir)-1));
+                options[sizeof(options)-1] = '\0';
+            }
+            ret = snprintf(vncdisplay, sizeof(vncdisplay), "%s:%d%s",
                            vm->def->vncListen,
-                           vm->def->vncActivePort - 5900);
-        else
+                           vm->def->vncActivePort - 5900,
+                           options);
+        } else {
             ret = snprintf(vncdisplay, sizeof(vncdisplay), "%d",
                            vm->def->vncActivePort - 5900);
+        }
         if (ret < 0 || ret >= (int)sizeof(vncdisplay))
             goto error;
 

src/qemu_conf.h

@@ -289,6 +289,10 @@ struct qemud_driver {
     char *networkConfigDir;
     char *networkAutostartDir;
     char logDir[PATH_MAX];
+    int vncTLS : 1;
+    int vncTLSx509verify : 1;
+    char *vncTLSx509certdir;
+    char vncListen[BR_INET_ADDR_MAXLEN];
 };
 
 
@@ -311,6 +315,8 @@ void qemudReportError(virConnectPtr conn,
     ATTRIBUTE_FORMAT(printf,5,6);
 
 
+int qemudLoadDriverConfig(struct qemud_driver *driver,
+                          const char *filename);
 
 struct qemud_vm *qemudFindVMByID(const struct qemud_driver *driver,
                                  int id);

src/qemu_driver.c

@@ -155,6 +155,7 @@ qemudStartup(void) {
     uid_t uid = geteuid();
     struct passwd *pw;
     char *base = NULL;
+    char driverConf[PATH_MAX];
 
     if (!(qemu_driver = calloc(1, sizeof(struct qemud_driver)))) {
         return -1;
@@ -167,7 +168,7 @@ qemudStartup(void) {
         if (snprintf(qemu_driver->logDir, PATH_MAX, "%s/log/libvirt/qemu", LOCAL_STATE_DIR) >= PATH_MAX)
             goto snprintf_error;
 
-        if ((base = strdup (SYSCONF_DIR "/libvirt/qemu")) == NULL)
+        if ((base = strdup (SYSCONF_DIR "/libvirt")) == NULL)
             goto out_of_memory;
     } else {
         if (!(pw = getpwuid(uid))) {
@@ -179,7 +180,7 @@ qemudStartup(void) {
         if (snprintf(qemu_driver->logDir, PATH_MAX, "%s/.libvirt/qemu/log", pw->pw_dir) >= PATH_MAX)
             goto snprintf_error;
 
-        if (asprintf (&base, "%s/.libvirt/qemu", pw->pw_dir) == -1) {
+        if (asprintf (&base, "%s/.libvirt", pw->pw_dir) == -1) {
             qemudLog (QEMUD_ERR, "out of memory in asprintf");
             goto out_of_memory;
         }
@@ -188,24 +189,36 @@ qemudStartup(void) {
     /* Configuration paths are either ~/.libvirt/qemu/... (session) or
      * /etc/libvirt/qemu/... (system).
      */
-    if (asprintf (&qemu_driver->configDir, "%s", base) == -1)
+    if (snprintf (driverConf, sizeof(driverConf), "%s/qemu.conf", base) == -1)
         goto out_of_memory;
+    driverConf[sizeof(driverConf)-1] = '\0';
 
-    if (asprintf (&qemu_driver->autostartDir, "%s/autostart", base) == -1)
+    if (asprintf (&qemu_driver->configDir, "%s/qemu", base) == -1)
         goto out_of_memory;
 
-    if (asprintf (&qemu_driver->networkConfigDir, "%s/networks", base) == -1)
+    if (asprintf (&qemu_driver->autostartDir, "%s/qemu/autostart", base) == -1)
         goto out_of_memory;
 
-    if (asprintf (&qemu_driver->networkAutostartDir, "%s/networks/autostart",
+    if (asprintf (&qemu_driver->networkConfigDir, "%s/qemu/networks", base) == -1)
+        goto out_of_memory;
+
+    if (asprintf (&qemu_driver->networkAutostartDir, "%s/qemu/networks/autostart",
                   base) == -1)
         goto out_of_memory;
 
-    if (qemudScanConfigs(qemu_driver) < 0)
+    free(base);
+
+    if (qemudLoadDriverConfig(qemu_driver, driverConf) < 0) {
         qemudShutdown();
+        return -1;
+    }
+
+    if (qemudScanConfigs(qemu_driver) < 0) {
+        qemudShutdown();
+        return -1;
+    }
     qemudAutostartConfigs(qemu_driver);
 
-    free(base);
     return 0;
 
  snprintf_error: