[libvirt] [PATCH v3 13/14] migration: refactor: one return in forURI family functions

[Nikolay Shirokovskiy]

May be a matter of a taste but this version with one return point in every
function looks simplier to understand and to extend too. Anyway after such
a heavy refactoring a little cleanup will not hurt.

Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy at virtuozzo.com>
---
 src/libvirt-domain.c |   61 +++++++++++++++++++++++---------------------------
 1 files changed, 28 insertions(+), 33 deletions(-)

diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c
index fc61830..f012f4b 100644
--- a/src/libvirt-domain.c
+++ b/src/libvirt-domain.c
@@ -4242,6 +4242,7 @@ virDomainMigrateToURI(virDomainPtr domain,
                       const char *dname,
                       unsigned long bandwidth)
 {
+    int ret = -1;
     const char *dconnuri = NULL;
     const char *miguri = NULL;
 
@@ -4252,26 +4253,24 @@ virDomainMigrateToURI(virDomainPtr domain,
 
     /* First checkout the source */
     virCheckDomainReturn(domain, -1);
-    virCheckReadOnlyGoto(domain->conn->flags, error);
-    virCheckNonNullArgGoto(duri, error);
+    virCheckReadOnlyGoto(domain->conn->flags, cleanup);
+    virCheckNonNullArgGoto(duri, cleanup);
 
     if (virDomainMigrateUnmanagedCheckCompat(domain, flags) < 0)
-        goto error;
+        goto cleanup;
 
     if (flags & VIR_MIGRATE_PEER2PEER)
         dconnuri = duri;
     else
         miguri = duri;
 
-    if (virDomainMigrateUnmanaged(domain, NULL, flags,
-                                  dname, dconnuri, miguri, bandwidth) < 0)
-        goto error;
-
-    return 0;
+    ret = virDomainMigrateUnmanaged(domain, NULL, flags,
+                                    dname, dconnuri, miguri, bandwidth);
+ cleanup:
+    if (ret < 0)
+        virDispatchError(domain->conn);
 
- error:
-    virDispatchError(domain->conn);
-    return -1;
+    return ret;
 }
 
 
@@ -4370,6 +4369,7 @@ virDomainMigrateToURI2(virDomainPtr domain,
                        const char *dname,
                        unsigned long bandwidth)
 {
+    int ret = -1;
     VIR_DOMAIN_DEBUG(domain, "dconnuri=%s, miguri=%s, dxml=%s, "
                      "flags=%lx, dname=%s, bandwidth=%lu",
                      NULLSTR(dconnuri), NULLSTR(miguri), NULLSTR(dxml),
@@ -4379,23 +4379,20 @@ virDomainMigrateToURI2(virDomainPtr domain,
 
     /* First checkout the source */
     virCheckDomainReturn(domain, -1);
-    virCheckReadOnlyGoto(domain->conn->flags, error);
+    virCheckReadOnlyGoto(domain->conn->flags, cleanup);
 
     if (virDomainMigrateUnmanagedCheckCompat(domain, flags) < 0)
-        goto error;
+        goto cleanup;
 
     if (!(flags & VIR_MIGRATE_PEER2PEER))
         dconnuri = NULL;
 
-    if (virDomainMigrateUnmanaged(domain, NULL, flags,
-                                  dname, dconnuri, miguri, bandwidth) < 0)
-        goto error;
-
-    return 0;
-
- error:
-    virDispatchError(domain->conn);
-    return -1;
+    ret = virDomainMigrateUnmanaged(domain, NULL, flags,
+                                    dname, dconnuri, miguri, bandwidth);
+ cleanup:
+    if (ret < 0)
+        virDispatchError(domain->conn);
+    return ret;
 }
 
 
@@ -4443,6 +4440,7 @@ virDomainMigrateToURI3(virDomainPtr domain,
                        unsigned int nparams,
                        unsigned int flags)
 {
+    int ret = -1;
     VIR_DOMAIN_DEBUG(domain, "dconnuri=%s, params=%p, nparms=%u flags=%x",
                      NULLSTR(dconnuri), params, nparams, flags);
     VIR_TYPED_PARAMS_DEBUG(params, nparams);
@@ -4451,23 +4449,20 @@ virDomainMigrateToURI3(virDomainPtr domain,
 
     /* First checkout the source */
     virCheckDomainReturn(domain, -1);
-    virCheckReadOnlyGoto(domain->conn->flags, error);
+    virCheckReadOnlyGoto(domain->conn->flags, cleanup);
 
     if (virDomainMigrateUnmanagedCheckCompat(domain, flags) < 0)
-        goto error;
+        goto cleanup;
 
     if (!(flags & VIR_MIGRATE_PEER2PEER))
         dconnuri = NULL;
 
-    if (virDomainMigrateUnmanagedParams(domain, dconnuri,
-                                        params, nparams, flags) < -1)
-        goto error;
-
-    return 0;
-
- error:
-    virDispatchError(domain->conn);
-    return -1;
+    ret = virDomainMigrateUnmanagedParams(domain, dconnuri,
+                                          params, nparams, flags);
+ cleanup:
+    if (ret < 0)
+        virDispatchError(domain->conn);
+    return ret;
 }
 
 
-- 
1.7.1