[libvirt] [PATCH 1/2] qemu: Refactor qemuParseCommandLine error path for vnc parse

[John Ferlan]

Rather than have vnc be a variable within the if, promote it
to the top, then adjust the code to use the error label to call
virDomainGraphicsDefFree

Signed-off-by: John Ferlan <jferlan at redhat.com>
---
 src/qemu/qemu_command.c | 24 ++++++------------------
 1 file changed, 6 insertions(+), 18 deletions(-)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index d7f19f3..7b5a36f 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -12999,6 +12999,7 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
     int nvirtiodisk = 0;
     qemuDomainCmdlineDefPtr cmd = NULL;
     virDomainDiskDefPtr disk = NULL;
+    virDomainGraphicsDefPtr vnc = NULL;
     const char *ceph_args = qemuFindEnv(progenv, "CEPH_ARGS");
     bool have_sdl = false;
 
@@ -13100,7 +13101,6 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
             arg++;
 
         if (STREQ(arg, "-vnc")) {
-            virDomainGraphicsDefPtr vnc;
             char *tmp;
             WANT_VALUE();
             if (VIR_ALLOC(vnc) < 0)
@@ -13109,10 +13109,8 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
 
             if (STRPREFIX(val, "unix:")) {
                 /* -vnc unix:/some/big/path */
-                if (VIR_STRDUP(vnc->data.vnc.socket, val + 5) < 0) {
-                    virDomainGraphicsDefFree(vnc);
+                if (VIR_STRDUP(vnc->data.vnc.socket, val + 5) < 0)
                     goto error;
-                }
             } else {
                 /*
                  * -vnc 127.0.0.1:4
@@ -13126,7 +13124,6 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
                     sep = "]:";
                 tmp = strstr(val, sep);
                 if (!tmp) {
-                    virDomainGraphicsDefFree(vnc);
                     virReportError(VIR_ERR_INTERNAL_ERROR,
                                    _("missing VNC port number in '%s'"), val);
                     goto error;
@@ -13134,7 +13131,6 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
                 port = tmp + strlen(sep);
                 if (virStrToLong_i(port, &opts, 10,
                                    &vnc->data.vnc.port) < 0) {
-                    virDomainGraphicsDefFree(vnc);
                     virReportError(VIR_ERR_INTERNAL_ERROR,
                                    _("cannot parse VNC port '%s'"), port);
                     goto error;
@@ -13145,18 +13141,14 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
                 else
                     virDomainGraphicsListenSetAddress(vnc, 0,
                                                       val, tmp-val, true);
-                if (!virDomainGraphicsListenGetAddress(vnc, 0)) {
-                    virDomainGraphicsDefFree(vnc);
+                if (!virDomainGraphicsListenGetAddress(vnc, 0))
                     goto error;
-                }
 
                 if (*opts == ',') {
                     char *orig_opts;
 
-                    if (VIR_STRDUP(orig_opts, opts + 1) < 0) {
-                        virDomainGraphicsDefFree(vnc);
+                    if (VIR_STRDUP(orig_opts, opts + 1) < 0)
                         goto error;
-                    }
                     opts = orig_opts;
 
                     while (opts && *opts) {
@@ -13177,7 +13169,6 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
                                                    _("cannot parse VNC "
                                                      "WebSocket port '%s'"),
                                                    websocket);
-                                    virDomainGraphicsDefFree(vnc);
                                     VIR_FREE(orig_opts);
                                     goto error;
                                 }
@@ -13198,7 +13189,6 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
                                     virReportError(VIR_ERR_INTERNAL_ERROR,
                                                    _("unknown vnc display sharing policy '%s'"),
                                                      sharePolicy);
-                                    virDomainGraphicsDefFree(vnc);
                                     VIR_FREE(orig_opts);
                                     goto error;
                                 } else {
@@ -13207,7 +13197,6 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
                             } else {
                                 virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                                                _("missing vnc sharing policy"));
-                                virDomainGraphicsDefFree(vnc);
                                 VIR_FREE(orig_opts);
                                 goto error;
                             }
@@ -13221,10 +13210,8 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
                 vnc->data.vnc.autoport = false;
             }
 
-            if (VIR_APPEND_ELEMENT(def->graphics, def->ngraphics, vnc) < 0) {
-                virDomainGraphicsDefFree(vnc);
+            if (VIR_APPEND_ELEMENT(def->graphics, def->ngraphics, vnc) < 0)
                 goto error;
-            }
         } else if (STREQ(arg, "-sdl")) {
             have_sdl = true;
         } else if (STREQ(arg, "-m")) {
@@ -13991,6 +13978,7 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
     return def;
 
  error:
+    virDomainGraphicsDefFree(vnc);
     virDomainDiskDefFree(disk);
     qemuDomainCmdlineDefFree(cmd);
     virDomainDefFree(def);
-- 
2.5.0