[libvirt] [PATCH 4/4] bhyve: host API support

[Wojciech Macek]

New functionalities:
- connectGetMaxVcpus - on bhyve hardcode this value to 16
- nodeGetFreeMemory - do not use physmem_get on FreeBSD, since
                      it might get wrong value on systems with
                      more than 100GB of RAM
- nodeGetCPUMap - wrapper only for mapping function, currently not
                  supported by FreeBSD
- nodeSet/GetMemoryParameters - wrapper only for future improvements,
                                currently not supported by FreeBSD
---
 src/bhyve/bhyve_driver.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/nodeinfo.c           | 19 ++++++++++++++
 2 files changed, 85 insertions(+)

diff --git a/src/bhyve/bhyve_driver.c b/src/bhyve/bhyve_driver.c
index baa3340..2e6a8cb 100644
--- a/src/bhyve/bhyve_driver.c
+++ b/src/bhyve/bhyve_driver.c
@@ -694,6 +694,67 @@ cleanup:
     return -1;
 }
 
+static int
+bhyveConnectGetMaxVcpus(virConnectPtr conn ATTRIBUTE_UNUSED,
+                          const char *type) {
+    if (virConnectGetMaxVcpusEnsureACL(conn) < 0)
+        return -1;
+
+    /*
+     * Bhyve supports up to 16 VCPUs, but offers no method to check this
+     * value. Hardcode 16...
+     */
+    if (!type || STRCASEEQ(type, "bhyve"))
+        return 16;
+
+    virReportError(VIR_ERR_INVALID_ARG, _("unknown type '%s'"), type);
+    return -1;
+}
+
+static unsigned long long
+bhyveNodeGetFreeMemory(virConnectPtr conn)
+{
+    if (virNodeGetFreeMemoryEnsureACL(conn) < 0)
+        return 0;
+
+    return nodeGetFreeMemory();
+}
+
+static int
+bhyveNodeGetCPUMap(virConnectPtr conn,
+                  unsigned char **cpumap,
+                  unsigned int *online,
+                  unsigned int flags)
+{
+    if (virNodeGetCPUMapEnsureACL(conn) < 0)
+        return -1;
+
+    return nodeGetCPUMap(cpumap, online, flags);
+}
+
+static int
+bhyveNodeGetMemoryParameters(virConnectPtr conn,
+                            virTypedParameterPtr params,
+                            int *nparams,
+                            unsigned int flags)
+{
+    if (virNodeGetMemoryParametersEnsureACL(conn) < 0)
+        return -1;
+
+    return nodeGetMemoryParameters(params, nparams, flags);
+}
+
+static int
+bhyveNodeSetMemoryParameters(virConnectPtr conn,
+                            virTypedParameterPtr params,
+                            int nparams,
+                            unsigned int flags)
+{
+    if (virNodeSetMemoryParametersEnsureACL(conn) < 0)
+        return -1;
+
+    return nodeSetMemoryParameters(params, nparams, flags);
+}
 
 static virDriver bhyveDriver = {
     .no = VIR_DRV_BHYVE,
@@ -722,6 +783,11 @@ static virDriver bhyveDriver = {
     .nodeGetCPUStats = bhyveNodeGetCPUStats, /* 1.2.2 */
     .nodeGetMemoryStats = bhyveNodeGetMemoryStats, /* 1.2.2 */
     .nodeGetInfo = bhyveNodeGetInfo, /* 1.2.3 */
+    .connectGetMaxVcpus = bhyveConnectGetMaxVcpus, /* 1.2.3 */
+    .nodeGetFreeMemory = bhyveNodeGetFreeMemory, /* 1.2.3 */
+    .nodeGetCPUMap = bhyveNodeGetCPUMap, /* 1.2.3 */
+    .nodeGetMemoryParameters = bhyveNodeGetMemoryParameters, /* 1.2.3 */
+    .nodeSetMemoryParameters = bhyveNodeSetMemoryParameters, /* 1.2.3 */
 };
 
 
diff --git a/src/nodeinfo.c b/src/nodeinfo.c
index 6d33f64..7996d55 100644
--- a/src/nodeinfo.c
+++ b/src/nodeinfo.c
@@ -1699,6 +1699,24 @@ nodeGetCellsFreeMemoryFake(unsigned long long *freeMems,
 static unsigned long long
 nodeGetFreeMemoryFake(void)
 {
+#if defined(__FreeBSD__)
+    unsigned long pagesize = getpagesize();
+    u_int value;
+    size_t value_size = sizeof(value);
+    unsigned long long freemem;
+
+    if (sysctlbyname("vm.stats.vm.v_free_count", &value,
+                     &value_size, NULL, 0) < 0) {
+        virReportSystemError(errno, "%s",
+                             _("sysctl failed for vm.stats.vm.v_free_count"));
+        return 0;
+    }
+
+    freemem = value;
+    freemem = freemem * (unsigned long long)pagesize;
+
+    return freemem;
+#else
     double avail = physmem_available();
     unsigned long long ret;
 
@@ -1709,6 +1727,7 @@ nodeGetFreeMemoryFake(void)
     }
 
     return ret;
+#endif
 }
 
 /* returns 1 on success, 0 if the detection failed and -1 on hard error */
-- 
1.9.0