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[Libvir] [PATCH] Add virNodeGetCellsFreeMemory support to test driver



The attached patch adds support for the command virNodeGetCellsFreeMemory
to the test driver. The patch also moves numa cell information into
the connection structure rather than hard coding it in GetCapabilities,
so the memory values have some place to be stored, and so the driver
can be expanded in the future to allow numa info to be specified by a
test driver config file.

Tested this to verify the capabilities xml is generated the same and
that the GetCells command works as expected via the python bindings.

Thanks,
Cole

diff --git a/src/test.c b/src/test.c
index 6cf3fda..135d96f 100644
--- a/src/test.c
+++ b/src/test.c
@@ -106,6 +106,17 @@ typedef struct _testNet *testNetPtr;
 
 #define MAX_DOMAINS 20
 #define MAX_NETWORKS 20
+#define MAX_CPUS 128
+
+struct _testCell {
+    unsigned long mem;
+    int numCpus;
+    int cpus[MAX_CPUS];
+};
+typedef struct _testCell testCell;
+typedef struct _testCell *testCellPtr;
+
+#define MAX_CELLS 128
 
 struct _testConn {
     char path[PATH_MAX];
@@ -115,6 +126,8 @@ struct _testConn {
     testDom domains[MAX_DOMAINS];
     int numNetworks;
     testNet networks[MAX_NETWORKS];
+    int numCells;
+    testCell cells[MAX_CELLS];
 };
 typedef struct _testConn testConn;
 typedef struct _testConn *testConnPtr;
@@ -638,6 +651,16 @@ static int testOpenDefault(virConnectPtr conn) {
     strcpy(privconn->networks[0].dhcpStart, "192.168.122.128");
     strcpy(privconn->networks[0].dhcpEnd, "192.168.122.253");
 
+    // Numa setup
+    privconn->numCells = 2;
+    for (u = 0; u < 2; ++u) {
+        privconn->cells[u].numCpus = 8;
+        privconn->cells[u].mem = (u + 1) * 2048 * 1024;
+    }
+    for (u = 0 ; u < 16 ; u++) {
+        privconn->cells[u % 2].cpus[(u / 2)] = u;
+    }
+
     conn->privateData = privconn;
     return (VIR_DRV_OPEN_SUCCESS);
 }
@@ -711,6 +734,7 @@ static int testOpenFromFile(virConnectPtr conn,
     privconn->nextDomID = 1;
     privconn->numDomains = 0;
     privconn->numNetworks = 0;
+    privconn->numCells = 0;
     strncpy(privconn->path, file, PATH_MAX-1);
     privconn->path[PATH_MAX-1] = '\0';
     memmove(&privconn->nodeInfo, &defaultNodeInfo, sizeof(defaultNodeInfo));
@@ -982,8 +1006,9 @@ static char *testGetCapabilities (virConnectPtr conn)
     virCapsPtr caps;
     virCapsGuestPtr guest;
     char *xml;
-    int cell1[] = { 0, 2, 4, 6, 8, 10, 12, 14 };
-    int cell2[] = { 1, 3, 5, 7, 9, 11, 13, 15 };
+    int i;
+
+    GET_CONNECTION(conn, -1);
 
     if ((caps = virCapabilitiesNew(TEST_MODEL, 0, 0)) == NULL)
         goto no_memory;
@@ -993,10 +1018,11 @@ static char *testGetCapabilities (virConnectPtr conn)
     if (virCapabilitiesAddHostFeature(caps ,"nonpae") < 0)
         goto no_memory;
 
-    if (virCapabilitiesAddHostNUMACell(caps, 0, 8, cell1) < 0)
-        goto no_memory;
-    if (virCapabilitiesAddHostNUMACell(caps, 1, 8, cell2) < 0)
-        goto no_memory;
+    for (i = 0; i < privconn->numCells; ++i) {
+        if (virCapabilitiesAddHostNUMACell(caps, i, privconn->cells[i].numCpus,
+                                           privconn->cells[i].cpus) < 0)
+            goto no_memory;
+    }
 
     if ((guest = virCapabilitiesAddGuest(caps,
                                          "linux",
@@ -1576,6 +1602,29 @@ static virDomainPtr testDomainDefineXML(virConnectPtr conn,
     return virGetDomain(conn, privconn->domains[handle].name, privconn->domains[handle].uuid);
 }
 
+static int testNodeGetCellsFreeMemory(virConnectPtr conn,
+                                      unsigned long long *freemems,
+                                      int startCell, int maxCells) {
+    int i, j;
+
+    GET_CONNECTION(conn, -1);
+
+    if (startCell > privconn->numCells) {
+        testError(conn, NULL, NULL, VIR_ERR_INVALID_ARG,
+                  _("Range exceeds available cells"));
+        return -1;
+    }
+
+    for (i = startCell, j = 0;
+         (i < privconn->numCells && j < maxCells) ;
+         ++i, ++j) {
+        freemems[j] = privconn->cells[i].mem;
+    }
+
+    return j;
+}
+
+
 static int testDomainCreate(virDomainPtr domain) {
     GET_DOMAIN(domain, -1);
 
@@ -2014,7 +2063,7 @@ static virDriver testDriver = {
     NULL, /* domainMigrateFinish */
     NULL, /* domainBlockStats */
     NULL, /* domainInterfaceStats */
-    NULL, /* nodeGetCellsFreeMemory */
+    testNodeGetCellsFreeMemory, /* nodeGetCellsFreeMemory */
     NULL, /* getFreeMemory */
 };
 

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