[libvirt] [PATCH v2] qemu: fix domain unlock/unref in qemuMigrationSrcPerform

[Nikolay Shirokovskiy]

qemuMigrationSrcPerform callers expect it to call virDomainObjEndAPI
in any case so on error paths we miss the virDomainObjEndAPI call.
To fix this let's make qemuMigrationSrcPerform callers responsible
for the virDomainObjEndAPI call.

Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy at virtuozzo.com>
---

diff to v1 [1]:
- move virDomainObjEndAPI call to qemuMigrationSrcPerform callers

[1] https://www.redhat.com/archives/libvir-list/2019-April/msg00032.html

 src/qemu/qemu_driver.c    | 21 +++++++++------------
 src/qemu/qemu_migration.c |  2 --
 2 files changed, 9 insertions(+), 14 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 62d8d97..37baa5c 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -12550,7 +12550,7 @@ qemuDomainMigratePerform(virDomainPtr dom,
                          unsigned long resource)
 {
     virQEMUDriverPtr driver = dom->conn->privateData;
-    virDomainObjPtr vm;
+    virDomainObjPtr vm = NULL;
     int ret = -1;
     const char *dconnuri = NULL;
     qemuMigrationParamsPtr migParams = NULL;
@@ -12571,10 +12571,8 @@ qemuDomainMigratePerform(virDomainPtr dom,
     if (!(vm = qemuDomObjFromDomain(dom)))
         goto cleanup;
 
-    if (virDomainMigratePerformEnsureACL(dom->conn, vm->def) < 0) {
-        virDomainObjEndAPI(&vm);
+    if (virDomainMigratePerformEnsureACL(dom->conn, vm->def) < 0)
         goto cleanup;
-    }
 
     if (flags & VIR_MIGRATE_PEER2PEER)
         VIR_STEAL_PTR(dconnuri, uri);
@@ -12592,6 +12590,7 @@ qemuDomainMigratePerform(virDomainPtr dom,
                                   flags, dname, resource, false);
 
  cleanup:
+    virDomainObjEndAPI(&vm);
     qemuMigrationParamsFree(migParams);
     return ret;
 }
@@ -12988,7 +12987,7 @@ qemuDomainMigratePerform3(virDomainPtr dom,
                           unsigned long resource)
 {
     virQEMUDriverPtr driver = dom->conn->privateData;
-    virDomainObjPtr vm;
+    virDomainObjPtr vm = NULL;
     qemuMigrationParamsPtr migParams = NULL;
     int ret = -1;
 
@@ -13001,10 +13000,8 @@ qemuDomainMigratePerform3(virDomainPtr dom,
     if (!(vm = qemuDomObjFromDomain(dom)))
         goto cleanup;
 
-    if (virDomainMigratePerform3EnsureACL(dom->conn, vm->def) < 0) {
-        virDomainObjEndAPI(&vm);
+    if (virDomainMigratePerform3EnsureACL(dom->conn, vm->def) < 0)
         goto cleanup;
-    }
 
     ret = qemuMigrationSrcPerform(driver, dom->conn, vm, xmlin, NULL,
                                   dconnuri, uri, NULL, NULL, 0, NULL, 0,
@@ -13014,6 +13011,7 @@ qemuDomainMigratePerform3(virDomainPtr dom,
                                   flags, dname, resource, true);
 
  cleanup:
+    virDomainObjEndAPI(&vm);
     qemuMigrationParamsFree(migParams);
     return ret;
 }
@@ -13030,7 +13028,7 @@ qemuDomainMigratePerform3Params(virDomainPtr dom,
                                 unsigned int flags)
 {
     virQEMUDriverPtr driver = dom->conn->privateData;
-    virDomainObjPtr vm;
+    virDomainObjPtr vm = NULL;
     const char *dom_xml = NULL;
     const char *persist_xml = NULL;
     const char *dname = NULL;
@@ -13088,10 +13086,8 @@ qemuDomainMigratePerform3Params(virDomainPtr dom,
     if (!(vm = qemuDomObjFromDomain(dom)))
         goto cleanup;
 
-    if (virDomainMigratePerform3ParamsEnsureACL(dom->conn, vm->def) < 0) {
-        virDomainObjEndAPI(&vm);
+    if (virDomainMigratePerform3ParamsEnsureACL(dom->conn, vm->def) < 0)
         goto cleanup;
-    }
 
     ret = qemuMigrationSrcPerform(driver, dom->conn, vm, dom_xml, persist_xml,
                                   dconnuri, uri, graphicsuri, listenAddress,
@@ -13100,6 +13096,7 @@ qemuDomainMigratePerform3Params(virDomainPtr dom,
                                   cookiein, cookieinlen, cookieout, cookieoutlen,
                                   flags, dname, bandwidth, true);
  cleanup:
+    virDomainObjEndAPI(&vm);
     qemuMigrationParamsFree(migParams);
     VIR_FREE(migrate_disks);
     return ret;
diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 419a729..bb43aff 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -4686,7 +4686,6 @@ qemuMigrationSrcPerformJob(virQEMUDriverPtr driver,
     }
 
  cleanup:
-    virDomainObjEndAPI(&vm);
     virObjectEventStateQueue(driver->domainEventState, event);
     virObjectUnref(cfg);
     return ret;
@@ -4757,7 +4756,6 @@ qemuMigrationSrcPerformPhase(virQEMUDriverPtr driver,
         qemuDomainRemoveInactiveJob(driver, vm);
 
  cleanup:
-    virDomainObjEndAPI(&vm);
     return ret;
 }
 
-- 
1.8.3.1