numatune: add check for numatune nodeset range

There was no check for 'nodeset' attribute in numatune-related
elements.  This patch adds validation that any nodeset specified does
not exceed maximum host node.

Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>

src/conf/numatune_conf.c

@@ -612,3 +612,31 @@ virDomainNumatuneHasPerNodeBinding(virDomainNumatunePtr numatune)
 
     return false;
 }
+
+int
+virDomainNumatuneSpecifiedMaxNode(virDomainNumatunePtr numatune)
+{
+    int ret = -1;
+    virBitmapPtr nodemask = NULL;
+    size_t i;
+    int bit;
+
+    if (!numatune)
+        return ret;
+
+    nodemask = virDomainNumatuneGetNodeset(numatune, NULL, -1);
+    if (nodemask)
+        ret = virBitmapLastSetBit(nodemask);
+
+    for (i = 0; i < numatune->nmem_nodes; i++) {
+        nodemask = numatune->mem_nodes[i].nodeset;
+        if (!nodemask)
+            continue;
+
+        bit = virBitmapLastSetBit(nodemask);
+        if (bit > ret)
+            ret = bit;
+    }
+
+    return ret;
+}

src/conf/numatune_conf.h

@@ -102,4 +102,5 @@ bool virDomainNumatuneHasPlacementAuto(virDomainNumatunePtr numatune);
 
 bool virDomainNumatuneHasPerNodeBinding(virDomainNumatunePtr numatune);
 
+int virDomainNumatuneSpecifiedMaxNode(virDomainNumatunePtr numatune);
 #endif /* __NUMATUNE_CONF_H__ */

src/libvirt_private.syms

@@ -1733,6 +1733,7 @@ virNumaGetPageInfo;
 virNumaGetPages;
 virNumaIsAvailable;
 virNumaNodeIsAvailable;
+virNumaNodesetIsAvailable;
 virNumaSetPagePoolSize;
 virNumaSetupMemoryPolicy;
 

src/qemu/qemu_command.c

@@ -53,6 +53,7 @@
 #include "virstoragefile.h"
 #include "virtpm.h"
 #include "virscsi.h"
+#include "virnuma.h"
 #if defined(__linux__)
 # include <linux/capability.h>
 #endif
@@ -6664,6 +6665,9 @@ qemuBuildNumaArgStr(virQEMUDriverConfigPtr cfg,
         goto cleanup;
     }
 
+    if (!virNumaNodesetIsAvailable(def->numatune))
+        goto cleanup;
+
     for (i = 0; i < def->mem.nhugepages; i++) {
         ssize_t next_bit, pos = 0;
 

src/util/virnuma.c

@@ -165,6 +165,33 @@ virNumaSetupMemoryPolicy(virDomainNumatunePtr numatune,
     return ret;
 }
 
+bool
+virNumaNodesetIsAvailable(virDomainNumatunePtr numatune)
+{
+    int maxnode;
+    int bit;
+
+    if (!numatune)
+        return true;
+
+    bit = virDomainNumatuneSpecifiedMaxNode(numatune);
+    if (bit < 0)
+        return true;
+
+    if ((maxnode = virNumaGetMaxNode()) < 0)
+        return false;
+
+    maxnode = maxnode < NUMA_NUM_NODES ? maxnode : NUMA_NUM_NODES;
+    if (bit > maxnode)
+        goto error;
+
+    return true;
+
+ error:
+    virReportError(VIR_ERR_INTERNAL_ERROR,
+                   _("NUMA node %d is out of range"), bit);
+    return false;
+}
 
 bool
 virNumaIsAvailable(void)
@@ -330,6 +357,17 @@ virNumaSetupMemoryPolicy(virDomainNumatunePtr numatune,
     return 0;
 }
 
+bool
+virNumaNodesetIsAvailable(virDomainNumatunePtr numatune)
+{
+    if (virDomainNumatuneSpecifiedMaxNode(numatune) >= 0) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("libvirt is compiled without NUMA tuning support"));
+        return false;
+    }
+
+    return true;
+}
 
 bool
 virNumaIsAvailable(void)

src/util/virnuma.h

@@ -34,6 +34,7 @@ char *virNumaGetAutoPlacementAdvice(unsigned short vcups,
 int virNumaSetupMemoryPolicy(virDomainNumatunePtr numatune,
                              virBitmapPtr nodemask);
 
+bool virNumaNodesetIsAvailable(virDomainNumatunePtr numatune);
 bool virNumaIsAvailable(void);
 int virNumaGetMaxNode(void);
 bool virNumaNodeIsAvailable(int node);

tests/qemuxml2argvdata/qemuxml2argv-numatune-static-nodeset-exceed-hostnode.xml

@@ -0,0 +1,35 @@
+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>1048576</memory>
+  <currentMemory unit='KiB'>1048576</currentMemory>
+  <vcpu placement='static'>4</vcpu>
+  <numatune>
+    <memnode cellid='0' mode='strict' nodeset='0-8'/>
+    <memnode cellid='1' mode='strict' nodeset='0'/>
+  </numatune>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <cpu>
+    <numa>
+      <cell id='0' cpus='0-1' memory='524288'/>
+      <cell id='1' cpus='2-3' memory='524288'/>
+    </numa>
+  </cpu>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <disk type='block' device='disk'>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='ide'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+    </disk>
+    <controller type='ide' index='0'/>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>

tests/qemuxml2argvmock.c

@@ -21,6 +21,7 @@
 #include <config.h>
 
 #include "internal.h"
+#include "virnuma.h"
 #include <time.h>
 
 time_t time(time_t *t)
@@ -30,3 +31,11 @@ time_t time(time_t *t)
         *t = ret;
     return ret;
 }
+
+int
+virNumaGetMaxNode(void)
+{
+   const int maxnodesNum = 7;
+
+   return maxnodesNum;
+}

tests/qemuxml2argvtest.c

@@ -1251,6 +1251,8 @@ mymain(void)
     DO_TEST_FAILURE("numatune-memnode-no-memory", NONE);
 
     DO_TEST("numatune-auto-nodeset-invalid", NONE);
+    DO_TEST_FAILURE("numatune-static-nodeset-exceed-hostnode",
+                    QEMU_CAPS_OBJECT_MEMORY_RAM);
     DO_TEST_PARSE_ERROR("numatune-memnode-nocpu", NONE);
     DO_TEST_PARSE_ERROR("numatune-memnodes-problematic", NONE);
     DO_TEST("numad", NONE);