[libvirt] [PATCH v6 5/5] qemu: return balloon statistics when all domain statistics reported

[Derbyshev Dmitriy]

From: Derbyshev Dmitry <dderbyshev at virtuozzo.com>

To collect all balloon statistics for all guests it was necessary to make
several libvirt requests. Now it's possible to get all balloon statiscs via
single connectGetAllDomainStats call.

Signed-off-by: Derbyshev Dmitry <dderbyshev at virtuozzo.com>
---
 src/qemu/qemu_driver.c | 39 +++++++++++++++++++++++++++++++++++++--
 tools/virsh.pod        | 12 +++++++++++-
 2 files changed, 48 insertions(+), 3 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 0b76177..96343d8 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -18515,15 +18515,29 @@ qemuDomainGetStatsCpu(virQEMUDriverPtr driver ATTRIBUTE_UNUSED,
     return 0;
 }
 
+
+#define STORE_MEM_RECORD(TAG, NAME) {                  \
+    if (stats[i].tag == VIR_DOMAIN_MEMORY_STAT_ ##TAG) \
+        if (virTypedParamsAddULLong(&record->params,   \
+                                    &record->nparams,  \
+                                    maxparams,         \
+                                    "balloon." NAME,   \
+                                    stats[i].val) < 0) \
+            return -1;                                 \
+}
+
 static int
-qemuDomainGetStatsBalloon(virQEMUDriverPtr driver ATTRIBUTE_UNUSED,
+qemuDomainGetStatsBalloon(virQEMUDriverPtr driver,
                           virDomainObjPtr dom,
                           virDomainStatsRecordPtr record,
                           int *maxparams,
-                          unsigned int privflags ATTRIBUTE_UNUSED)
+                          unsigned int privflags)
 {
     qemuDomainObjPrivatePtr priv = dom->privateData;
+    virDomainMemoryStatStruct stats[VIR_DOMAIN_MEMORY_STAT_NR];
+    int nr_stats;
     unsigned long long cur_balloon = 0;
+    size_t i;
     int err = 0;
 
     if (!virDomainDefHasMemballoon(dom->def)) {
@@ -18548,8 +18562,29 @@ qemuDomainGetStatsBalloon(virQEMUDriverPtr driver ATTRIBUTE_UNUSED,
                                 virDomainDefGetMemoryTotal(dom->def)) < 0)
         return -1;
 
+    if (err || !HAVE_JOB(privflags))
+        return 0;
+
+    nr_stats = qemuDomainMemoryStatsInternal(driver, dom, stats,
+                                             VIR_DOMAIN_MEMORY_STAT_NR);
+    if (nr_stats < 0)
+        return 0;
+
+    for (i = 0; i < nr_stats; i++) {
+        STORE_MEM_RECORD(SWAP_IN, "swap_in")
+        STORE_MEM_RECORD(SWAP_OUT, "swap_out")
+        STORE_MEM_RECORD(MAJOR_FAULT, "major_fault")
+        STORE_MEM_RECORD(MINOR_FAULT, "minor_fault")
+        STORE_MEM_RECORD(UNUSED, "unused")
+        STORE_MEM_RECORD(AVAILABLE, "available")
+        STORE_MEM_RECORD(RSS, "rss")
+        STORE_MEM_RECORD(LAST_UPDATE, "last-update")
+        STORE_MEM_RECORD(USABLE, "usable")
+    }
+
     return 0;
 }
+#undef STORE_MEM_RECORD
 
 
 static int
diff --git a/tools/virsh.pod b/tools/virsh.pod
index 881ab76..1d33e6f 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -893,7 +893,17 @@ I<--cpu-total> returns:
 
 I<--balloon> returns:
 "balloon.current" - the memory in kiB currently used,
-"balloon.maximum" - the maximum memory in kiB allowed
+"balloon.maximum" - the maximum memory in kiB allowed,
+"balloon.swap_in" - the amount of data read from swap space (in kB),
+"balloon.swap_out" - the amount of memory written out to swap space (in kB),
+"balloon.major_fault" - the number of page faults then disk IO was required,
+"balloon.minor_fault" - the number of other page faults,
+"balloon.unused" - the amount of memory left unused by the system (in kB),
+"balloon.available" - the amount of usable memory as seen by the domain (in kB),
+"balloon.rss" - Resident Set Size of running domain's process (in kB),
+"balloon.usable" - the amount of memory which can be reclaimed by balloon
+without causing host swapping (in KB),
+"balloon.last-update" - timestamp of the last update of statistics (in seconds),
 
 I<--vcpu> returns:
 "vcpu.current" - current number of online virtual CPUs,
-- 
1.9.5.msysgit.0