[libvirt] [PATCH 2/5] conf: rename interface "usageCount" to "connections"

[Laine Stump]

I want to include this count in the xml output of networks, but
calling it "connections" in the XML sounds better than "usageCount", and it
would be better if the name in the XML matched the variable name.

In a few places, usageCount was being initialized to 0, but this is
unnecessary, because VIR_ALLOC_N zero-fills everything anyway.
---
 src/conf/network_conf.c     |  2 --
 src/conf/network_conf.h     |  2 +-
 src/network/bridge_driver.c | 46 ++++++++++++++++++++++-----------------------
 3 files changed, 24 insertions(+), 26 deletions(-)

diff --git a/src/conf/network_conf.c b/src/conf/network_conf.c
index 1decb8d..3800b09 100644
--- a/src/conf/network_conf.c
+++ b/src/conf/network_conf.c
@@ -1138,7 +1138,6 @@ virNetworkDefParseXML(xmlXPathContextPtr ctxt)
             }
 
             if (forwardDev) {
-                def->forwardIfs[0].usageCount = 0;
                 def->forwardIfs[0].dev = forwardDev;
                 forwardDev = NULL;
                 def->nForwardIfs++;
@@ -1170,7 +1169,6 @@ virNetworkDefParseXML(xmlXPathContextPtr ctxt)
 
                 def->forwardIfs[ii].dev = forwardDev;
                 forwardDev = NULL;
-                def->forwardIfs[ii].usageCount = 0;
                 def->nForwardIfs++;
             }
         }
diff --git a/src/conf/network_conf.h b/src/conf/network_conf.h
index c30be2b..f65cb0e 100644
--- a/src/conf/network_conf.h
+++ b/src/conf/network_conf.h
@@ -132,7 +132,7 @@ typedef struct _virNetworkForwardIfDef virNetworkForwardIfDef;
 typedef virNetworkForwardIfDef *virNetworkForwardIfDefPtr;
 struct _virNetworkForwardIfDef {
     char *dev;      /* name of device */
-    int usageCount; /* how many guest interfaces are bound to this device? */
+    int   connections; /* how many guest interfaces are connected to this device? */
 };
 
 typedef struct _virNetworkForwardPfDef virNetworkForwardPfDef;
diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c
index 9e4f79a..ecbd07a 100644
--- a/src/network/bridge_driver.c
+++ b/src/network/bridge_driver.c
@@ -2914,10 +2914,11 @@ networkAllocateActualDevice(virDomainNetDefPtr iface)
         } else {
             /* pick an interface from the pool */
 
-            /* PASSTHROUGH mode, and PRIVATE Mode + 802.1Qbh both require
-             * exclusive access to a device, so current usageCount must be
-             * 0.  Other modes can share, so just search for the one with
-             * the lowest usageCount.
+            /* PASSTHROUGH mode, and PRIVATE Mode + 802.1Qbh both
+             * require exclusive access to a device, so current
+             * connections count must be 0.  Other modes can share, so
+             * just search for the one with the lowest number of
+             * connections.
              */
             if (netdef->forwardType == VIR_NETWORK_FORWARD_PASSTHROUGH) {
                 if ((netdef->nForwardPfs > 0) && (netdef->nForwardIfs <= 0)) {
@@ -2949,14 +2950,13 @@ networkAllocateActualDevice(virDomainNetDefPtr iface)
                             virReportOOMError();
                             goto cleanup;
                         }
-                        netdef->forwardIfs[ii].usageCount = 0;
                     }
                 }
 
-                /* pick first dev with 0 usageCount */
+                /* pick first dev with 0 connections */
 
                 for (ii = 0; ii < netdef->nForwardIfs; ii++) {
-                    if (netdef->forwardIfs[ii].usageCount == 0) {
+                    if (netdef->forwardIfs[ii].connections == 0) {
                         dev = &netdef->forwardIfs[ii];
                         break;
                     }
@@ -2966,9 +2966,9 @@ networkAllocateActualDevice(virDomainNetDefPtr iface)
                        (iface->data.network.actual->virtPortProfile->virtPortType
                         == VIR_NETDEV_VPORT_PROFILE_8021QBH)) {
 
-                /* pick first dev with 0 usageCount */
+                /* pick first dev with 0 connections */
                 for (ii = 0; ii < netdef->nForwardIfs; ii++) {
-                    if (netdef->forwardIfs[ii].usageCount == 0) {
+                    if (netdef->forwardIfs[ii].connections == 0) {
                         dev = &netdef->forwardIfs[ii];
                         break;
                     }
@@ -2977,7 +2977,7 @@ networkAllocateActualDevice(virDomainNetDefPtr iface)
                 /* pick least used dev */
                 dev = &netdef->forwardIfs[0];
                 for (ii = 1; ii < netdef->nForwardIfs; ii++) {
-                    if (netdef->forwardIfs[ii].usageCount < dev->usageCount)
+                    if (netdef->forwardIfs[ii].connections < dev->connections)
                         dev = &netdef->forwardIfs[ii];
                 }
             }
@@ -3002,9 +3002,9 @@ networkAllocateActualDevice(virDomainNetDefPtr iface)
 
     if (dev) {
         /* we are now assured of success, so mark the allocation */
-        dev->usageCount++;
-        VIR_DEBUG("Using physical device %s, usageCount %d",
-                  dev->dev, dev->usageCount);
+        dev->connections++;
+        VIR_DEBUG("Using physical device %s, %d connections",
+                  dev->dev, dev->connections);
     }
     ret = 0;
 cleanup:
@@ -3077,7 +3077,7 @@ networkNotifyActualDevice(virDomainNetDefPtr iface)
         int ii;
         virNetworkForwardIfDefPtr dev = NULL;
 
-        /* find the matching interface in the pool and increment its usageCount */
+        /* find the matching interface and increment its connections */
 
         for (ii = 0; ii < netdef->nForwardIfs; ii++) {
             if (STREQ(actualDev, netdef->forwardIfs[ii].dev)) {
@@ -3094,10 +3094,10 @@ networkNotifyActualDevice(virDomainNetDefPtr iface)
         }
 
         /* PASSTHROUGH mode, and PRIVATE Mode + 802.1Qbh both require
-         * exclusive access to a device, so current usageCount must be
-         * 0 in those cases.
+         * exclusive access to a device, so current connections count
+         * must be 0 in those cases.
          */
-        if ((dev->usageCount > 0) &&
+        if ((dev->connections > 0) &&
             ((netdef->forwardType == VIR_NETWORK_FORWARD_PASSTHROUGH) ||
              ((netdef->forwardType == VIR_NETWORK_FORWARD_PRIVATE) &&
               iface->data.network.actual->virtPortProfile &&
@@ -3109,9 +3109,9 @@ networkNotifyActualDevice(virDomainNetDefPtr iface)
             goto cleanup;
         }
         /* we are now assured of success, so mark the allocation */
-        dev->usageCount++;
-        VIR_DEBUG("Using physical device %s, usageCount %d",
-                  dev->dev, dev->usageCount);
+        dev->connections++;
+        VIR_DEBUG("Using physical device %s, %d connections",
+                  dev->dev, dev->connections);
     }
 
     ret = 0;
@@ -3194,9 +3194,9 @@ networkReleaseActualDevice(virDomainNetDefPtr iface)
             goto cleanup;
         }
 
-        dev->usageCount--;
-        VIR_DEBUG("Releasing physical device %s, usageCount %d",
-                  dev->dev, dev->usageCount);
+        dev->connections--;
+        VIR_DEBUG("Releasing physical device %s, %d connections",
+                  dev->dev, dev->connections);
     }
 
     ret = 0;
-- 
1.7.11.2