nodedev: Introduce virNodeDeviceObjListFindSCSIHostByWWNs

In an overall effort to privatize access to virNodeDeviceObj and
virNodeDeviceObjList into the virnodedeviceobj module, move the
object list parsing from node_device_driver and replace with a
call to a virnodedeviceobj helper. This follows other similar
APIs/helpers which peruse the object list looking for some specific
data in order to get/return an @device (virNodeDevice) object to
the caller.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

src/conf/virnodedeviceobj.c

@@ -273,6 +273,39 @@ virNodeDeviceObjListFindByCap(virNodeDeviceObjListPtr devs,
 }
 
 
+virNodeDeviceObjPtr
+virNodeDeviceObjListFindSCSIHostByWWNs(virNodeDeviceObjListPtr devs,
+                                       const char *wwnn,
+                                       const char *wwpn)
+{
+    size_t i;
+
+    for (i = 0; i < devs->count; i++) {
+        virNodeDeviceObjPtr obj = devs->objs[i];
+        virNodeDevCapsDefPtr cap;
+
+        virNodeDeviceObjLock(obj);
+        cap = obj->def->caps;
+
+        while (cap) {
+            if (cap->data.type == VIR_NODE_DEV_CAP_SCSI_HOST) {
+                virNodeDeviceGetSCSIHostCaps(&cap->data.scsi_host);
+                if (cap->data.scsi_host.flags &
+                    VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST) {
+                    if (STREQ(cap->data.scsi_host.wwnn, wwnn) &&
+                        STREQ(cap->data.scsi_host.wwpn, wwpn))
+                        return obj;
+                }
+            }
+            cap = cap->next;
+        }
+        virNodeDeviceObjUnlock(obj);
+    }
+
+    return NULL;
+}
+
+
 void
 virNodeDeviceObjFree(virNodeDeviceObjPtr obj)
 {

src/conf/virnodedeviceobj.h

@@ -52,6 +52,11 @@ virNodeDeviceObjListFindBySysfsPath(virNodeDeviceObjListPtr devs,
                                     const char *sysfs_path)
     ATTRIBUTE_NONNULL(2);
 
+virNodeDeviceObjPtr
+virNodeDeviceObjListFindSCSIHostByWWNs(virNodeDeviceObjListPtr devs,
+                                       const char *wwnn,
+                                       const char *wwpn);
+
 virNodeDeviceObjPtr
 virNodeDeviceObjListAssignDef(virNodeDeviceObjListPtr devs,
                               virNodeDeviceDefPtr def);

src/libvirt_private.syms

@@ -970,6 +970,7 @@ virNodeDeviceObjListAssignDef;
 virNodeDeviceObjListExport;
 virNodeDeviceObjListFindByName;
 virNodeDeviceObjListFindBySysfsPath;
+virNodeDeviceObjListFindSCSIHostByWWNs;
 virNodeDeviceObjListFree;
 virNodeDeviceObjListGetNames;
 virNodeDeviceObjListGetParentHost;

src/node_device/node_device_driver.c

@@ -288,9 +288,6 @@ nodeDeviceLookupSCSIHostByWWN(virConnectPtr conn,
                               const char *wwpn,
                               unsigned int flags)
 {
-    size_t i;
-    virNodeDeviceObjListPtr devs = driver->devs;
-    virNodeDevCapsDefPtr cap = NULL;
     virNodeDeviceObjPtr obj = NULL;
     virNodeDeviceDefPtr def;
     virNodeDevicePtr device = NULL;
@@ -298,23 +295,16 @@ nodeDeviceLookupSCSIHostByWWN(virConnectPtr conn,
     virCheckFlags(0, NULL);
 
     nodeDeviceLock();
+    obj = virNodeDeviceObjListFindSCSIHostByWWNs(driver->devs, wwnn, wwpn);
+    nodeDeviceUnlock();
 
-    for (i = 0; i < devs->count; i++) {
-        obj = devs->objs[i];
-        virNodeDeviceObjLock(obj);
-        def = virNodeDeviceObjGetDef(obj);
-        cap = def->caps;
+    if (!obj)
+        return NULL;
 
-        while (cap) {
-            if (cap->data.type == VIR_NODE_DEV_CAP_SCSI_HOST) {
-                nodeDeviceSysfsGetSCSIHostCaps(&cap->data.scsi_host);
-                if (cap->data.scsi_host.flags &
-                    VIR_NODE_DEV_CAP_FLAG_HBA_FC_HOST) {
-                    if (STREQ(cap->data.scsi_host.wwnn, wwnn) &&
-                        STREQ(cap->data.scsi_host.wwpn, wwpn)) {
+    def = virNodeDeviceObjGetDef(obj);
 
     if (virNodeDeviceLookupSCSIHostByWWNEnsureACL(conn, def) < 0)
-                            goto error;
+        goto cleanup;
 
     if ((device = virGetNodeDevice(conn, def->name))) {
         if (VIR_STRDUP(device->parent, def->parent) < 0) {
@@ -322,24 +312,10 @@ nodeDeviceLookupSCSIHostByWWN(virConnectPtr conn,
             device = NULL;
         }
     }
-                        virNodeDeviceObjUnlock(obj);
-                        goto out;
-                    }
-                }
-            }
-            cap = cap->next;
-        }
 
+ cleanup:
     virNodeDeviceObjUnlock(obj);
-    }
-
- out:
-    nodeDeviceUnlock();
     return device;
-
- error:
-    virNodeDeviceObjUnlock(obj);
-    goto out;
 }