[libvirt] [PATCHv2 3/7] Introduce qemuDomainNamespaceMknodPaths

[Ján Tomko]

Separate the logic of creating devices from their gathering.

Use this new function in qemuDomainNamespaceSetupHostdev and
qemuDomainNamespaceSetupDisk.
---
 src/qemu/qemu_domain.c | 74 ++++++++++++++++++++++++++++++--------------------
 1 file changed, 44 insertions(+), 30 deletions(-)

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index d7f4b3fd7..f1c664248 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -9925,16 +9925,18 @@ qemuDomainDetachDeviceUnlink(virQEMUDriverPtr driver ATTRIBUTE_UNUSED,
 }
 
 
-int
-qemuDomainNamespaceSetupDisk(virQEMUDriverPtr driver,
-                             virDomainObjPtr vm,
-                             virStorageSourcePtr src)
+static int
+qemuDomainNamespaceMknodPaths(virDomainObjPtr vm,
+                              const char **paths,
+                              size_t npaths)
 {
-    virQEMUDriverConfigPtr cfg = NULL;
+    qemuDomainObjPrivatePtr priv = vm->privateData;
+    virQEMUDriverPtr driver = priv->driver;
+    virQEMUDriverConfigPtr cfg;
     char **devMountsPath = NULL;
     size_t ndevMountsPath = 0;
-    virStorageSourcePtr next;
     int ret = -1;
+    size_t i;
 
     if (!qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
         return 0;
@@ -9945,6 +9947,35 @@ qemuDomainNamespaceSetupDisk(virQEMUDriverPtr driver,
                                      &ndevMountsPath) < 0)
         goto cleanup;
 
+    for (i = 0; i < npaths; i++) {
+        if (qemuDomainAttachDeviceMknod(driver,
+                                        vm,
+                                        paths[i],
+                                        devMountsPath, ndevMountsPath) < 0)
+            goto cleanup;
+    }
+
+    ret = 0;
+ cleanup:
+    virStringListFreeCount(devMountsPath, ndevMountsPath);
+    virObjectUnref(cfg);
+    return ret;
+}
+
+
+int
+qemuDomainNamespaceSetupDisk(virQEMUDriverPtr driver ATTRIBUTE_UNUSED,
+                             virDomainObjPtr vm,
+                             virStorageSourcePtr src)
+{
+    virStorageSourcePtr next;
+    char **paths = NULL;
+    size_t npaths;
+    int ret = -1;
+
+    if (!qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
+        return 0;
+
     for (next = src; virStorageSourceIsBacking(next); next = next->backingStore) {
         if (virStorageSourceIsEmpty(next) ||
             !virStorageSourceIsLocalStorage(next)) {
@@ -9952,17 +9983,16 @@ qemuDomainNamespaceSetupDisk(virQEMUDriverPtr driver,
             continue;
         }
 
-        if (qemuDomainAttachDeviceMknod(driver,
-                                        vm,
-                                        next->path,
-                                        devMountsPath, ndevMountsPath) < 0)
+        if (VIR_APPEND_ELEMENT_COPY(paths, npaths, next->path) < 0)
             goto cleanup;
     }
 
+    if (qemuDomainNamespaceMknodPaths(vm, (const char **)paths, npaths) < 0)
+        return -1;
+
     ret = 0;
  cleanup:
-    virStringListFreeCount(devMountsPath, ndevMountsPath);
-    virObjectUnref(cfg);
+    VIR_FREE(paths);
     return ret;
 }
 
@@ -9983,13 +10013,10 @@ qemuDomainNamespaceTeardownDisk(virQEMUDriverPtr driver ATTRIBUTE_UNUSED,
 
 
 int
-qemuDomainNamespaceSetupHostdev(virQEMUDriverPtr driver,
+qemuDomainNamespaceSetupHostdev(virQEMUDriverPtr driver ATTRIBUTE_UNUSED,
                                 virDomainObjPtr vm,
                                 virDomainHostdevDefPtr hostdev)
 {
-    virQEMUDriverConfigPtr cfg = NULL;
-    char **devMountsPath = NULL;
-    size_t ndevMountsPath = 0;
     int ret = -1;
     char **paths = NULL;
     size_t i, npaths = 0;
@@ -10000,27 +10027,14 @@ qemuDomainNamespaceSetupHostdev(virQEMUDriverPtr driver,
     if (qemuDomainGetHostdevPath(NULL, hostdev, false, &npaths, &paths, NULL) < 0)
         goto cleanup;
 
-    cfg = virQEMUDriverGetConfig(driver);
-    if (qemuDomainGetPreservedMounts(cfg, vm,
-                                     &devMountsPath, NULL,
-                                     &ndevMountsPath) < 0)
+    if (qemuDomainNamespaceMknodPaths(vm, (const char **)paths, npaths) < 0)
         goto cleanup;
 
-    for (i = 0; i < npaths; i++) {
-        if (qemuDomainAttachDeviceMknod(driver,
-                                        vm,
-                                        paths[i],
-                                        devMountsPath, ndevMountsPath) < 0)
-        goto cleanup;
-    }
-
     ret = 0;
  cleanup:
     for (i = 0; i < npaths; i++)
         VIR_FREE(paths[i]);
     VIR_FREE(paths);
-    virStringListFreeCount(devMountsPath, ndevMountsPath);
-    virObjectUnref(cfg);
     return ret;
 }
 
-- 
2.13.6