vz: add memory statistics

Implemented counters:
 VIR_DOMAIN_MEMORY_STAT_SWAP_IN
 VIR_DOMAIN_MEMORY_STAT_SWAP_OUT
 VIR_DOMAIN_MEMORY_STAT_MINOR_FAULT
 VIR_DOMAIN_MEMORY_STAT_MAJOR_FAULT
 VIR_DOMAIN_MEMORY_STAT_AVAILABLE
 VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON
 VIR_DOMAIN_MEMORY_STAT_UNUSED

Comments.

1. Use vzDomObjFromDomainRef/virDomainObjEndAPI pair to get domain
object as we use prlsdkGetStatsParam. See previous statistics
comments.

2. Balloon statistics is not applicable to containers. Fault
statistics for containers not provided in PCS6 yet.

Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>

src/vz/vz_driver.c

@@ -1356,6 +1356,25 @@ vzDomainInterfaceStats(virDomainPtr domain,
     return ret;
 }
 
+static int
+vzDomainMemoryStats(virDomainPtr domain,
+                    virDomainMemoryStatPtr stats,
+                    unsigned int nr_stats,
+                    unsigned int flags)
+{
+    virDomainObjPtr dom = NULL;
+    int ret = -1;
+
+    virCheckFlags(0, -1);
+    if (!(dom = vzDomObjFromDomainRef(domain)))
+        return -1;
+
+    ret = prlsdkGetMemoryStats(dom, stats, nr_stats);
+    virDomainObjEndAPI(&dom);
+
+    return ret;
+}
+
 static virHypervisorDriver vzDriver = {
     .name = "vz",
     .connectOpen = vzConnectOpen,            /* 0.10.0 */
@@ -1408,6 +1427,7 @@ static virHypervisorDriver vzDriver = {
     .domainBlockStats = vzDomainBlockStats, /* 1.3.0 */
     .domainBlockStatsFlags = vzDomainBlockStatsFlags, /* 1.3.0 */
     .domainInterfaceStats = vzDomainInterfaceStats, /* 1.3.0 */
+    .domainMemoryStats = vzDomainMemoryStats, /* 1.3.0 */
 };
 
 static virConnectDriver vzConnectDriver = {

src/vz/vz_sdk.c

@@ -3881,3 +3881,64 @@ prlsdkGetVcpuStats(virDomainObjPtr dom, int idx, unsigned long long *vtime)
     VIR_FREE(name);
     return ret;
 }
+
+int
+prlsdkGetMemoryStats(virDomainObjPtr dom,
+                     virDomainMemoryStatPtr stats,
+                     unsigned int nr_stats)
+{
+    int ret = -1;
+    long long v = 0, t = 0, u = 0;
+    size_t i = 0;
+
+#define PRLSDK_GET_COUNTER(NAME, VALUE)                             \
+    if (prlsdkGetStatsParam(dom, NAME, &VALUE) < 0)                 \
+        goto cleanup;                                               \
+
+#define PRLSDK_MEMORY_STAT_SET(TAG, VALUE)                          \
+    if (i < nr_stats) {                                             \
+        stats[i].tag = (TAG);                                       \
+        stats[i].val = (VALUE);                                     \
+        i++;                                                        \
+    }
+
+    i = 0;
+
+    // count to kb
+    PRLSDK_GET_COUNTER("guest.ram.swap_in", v)
+    if (v != -1)
+        PRLSDK_MEMORY_STAT_SET(VIR_DOMAIN_MEMORY_STAT_SWAP_IN, v << 12)
+
+    PRLSDK_GET_COUNTER("guest.ram.swap_out", v)
+    if (v != -1)
+        PRLSDK_MEMORY_STAT_SET(VIR_DOMAIN_MEMORY_STAT_SWAP_OUT, v << 12)
+
+    PRLSDK_GET_COUNTER("guest.ram.minor_fault", v)
+    if (v != -1)
+        PRLSDK_MEMORY_STAT_SET(VIR_DOMAIN_MEMORY_STAT_MINOR_FAULT, v)
+
+    PRLSDK_GET_COUNTER("guest.ram.major_fault", v)
+    if (v != -1)
+        PRLSDK_MEMORY_STAT_SET(VIR_DOMAIN_MEMORY_STAT_MAJOR_FAULT, v)
+
+    PRLSDK_GET_COUNTER("guest.ram.total", v)
+    if (v != -1)
+        PRLSDK_MEMORY_STAT_SET(VIR_DOMAIN_MEMORY_STAT_AVAILABLE, v << 10)
+
+    PRLSDK_GET_COUNTER("guest.ram.balloon_actual", v)
+    if (v != -1)
+        PRLSDK_MEMORY_STAT_SET(VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON, v << 10)
+
+    PRLSDK_GET_COUNTER("guest.ram.usage", u)
+    PRLSDK_GET_COUNTER("guest.ram.total", t)
+    if (u != -1 && t != -1)
+        PRLSDK_MEMORY_STAT_SET(VIR_DOMAIN_MEMORY_STAT_UNUSED, (t - u) << 10)
+
+#undef PRLSDK_GET_COUNTER
+#undef PRLSDK_MEMORY_STAT_SET
+
+    ret = i;
+ cleanup:
+
+    return ret;
+}

src/vz/vz_sdk.h

@@ -74,3 +74,5 @@ int
 prlsdkGetNetStats(virDomainObjPtr dom, const char *path, virDomainInterfaceStatsPtr stats);
 int
 prlsdkGetVcpuStats(virDomainObjPtr dom, int idx, unsigned long long *time);
+int
+prlsdkGetMemoryStats(virDomainObjPtr dom, virDomainMemoryStatPtr stats, unsigned int nr_stats);