Retrieve data for individual block nodes in a hash table. Currently only
capacity and allocation data is extracted but this will be extended in
the future.
Signed-off-by: Peter Krempa <pkre...@redhat.com>
---
src/qemu/qemu_monitor.c | 18 ++++++++++
src/qemu/qemu_monitor.h | 11 ++++++
src/qemu/qemu_monitor_json.c | 69 ++++++++++++++++++++++++++++++++++++
src/qemu/qemu_monitor_json.h | 3 ++
4 files changed, 101 insertions(+)
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 86d3800108..b6c890f9ce 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -2220,6 +2220,24 @@
qemuMonitorBlockStatsUpdateCapacityBlockdev(qemuMonitorPtr mon,
return qemuMonitorJSONBlockStatsUpdateCapacityBlockdev(mon, stats);
}
+
+/**
+ * qemuMonitorBlockGetNamedNodeData:
+ * @mon: monitor object
+ *
+ * Uses 'query-named-block-nodes' to retrieve information about individual
+ * storage nodes and returns them in a hash table of qemuBlockNamedNodeDataPtrs
+ * filled with the data. The hash table keys are node names.
+ */
+virHashTablePtr
+qemuMonitorBlockGetNamedNodeData(qemuMonitorPtr mon)
+{
+ QEMU_CHECK_MONITOR_NULL(mon);
+
+ return qemuMonitorJSONBlockGetNamedNodeData(mon);
+}
+
+
int
qemuMonitorBlockResize(qemuMonitorPtr mon,
const char *device,
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index 11048dc76a..36eb5f342d 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -676,6 +676,17 @@ int
qemuMonitorBlockStatsUpdateCapacityBlockdev(qemuMonitorPtr mon,
virHashTablePtr stats)
ATTRIBUTE_NONNULL(2);
+
+typedef struct _qemuBlockNamedNodeData qemuBlockNamedNodeData;
+typedef qemuBlockNamedNodeData *qemuBlockNamedNodeDataPtr;
+struct _qemuBlockNamedNodeData {
+ unsigned long long capacity;
+ unsigned long long physical;
+};
+
+virHashTablePtr
+qemuMonitorBlockGetNamedNodeData(qemuMonitorPtr mon);
+
int qemuMonitorBlockResize(qemuMonitorPtr mon,
const char *device,
const char *nodename,
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 02308dffe6..c474ac0203 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -2879,6 +2879,75 @@
qemuMonitorJSONBlockStatsUpdateCapacityBlockdev(qemuMonitorPtr mon,
}
+static void
+qemuMonitorJSONBlockNamedNodeDataFree(qemuBlockNamedNodeDataPtr data)
+{
+ if (!data)
+ return;
+
+ g_free(data);
+}
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(qemuBlockNamedNodeData,
qemuMonitorJSONBlockNamedNodeDataFree);
+
+
+static int
+qemuMonitorJSONBlockGetNamedNodeDataWorker(size_t pos G_GNUC_UNUSED,
+ virJSONValuePtr val,
+ void *opaque)
+{
+ virHashTablePtr nodes = opaque;
+ virJSONValuePtr img;
+ const char *nodename;
+ g_autoptr(qemuBlockNamedNodeData) ent = NULL;
+
+ ent = g_new0(qemuBlockNamedNodeData, 1);
+
+ if (!(nodename = virJSONValueObjectGetString(val, "node-name")) ||
+ !(img = virJSONValueObjectGetObject(val, "image")))
+ goto broken;
+
+ if (virJSONValueObjectGetNumberUlong(img, "virtual-size", &ent->capacity)
< 0)
+ goto broken;
+
+ /* if actual-size is missing, image is not thin provisioned */
+ if (virJSONValueObjectGetNumberUlong(img, "actual-size", &ent->physical) <
0)
+ ent->physical = ent->capacity;
+
+ if (virHashAddEntry(nodes, nodename, ent) < 0)
+ return -1;
+
+ ent = NULL;
+
+ return 1; /* we don't want to steal the value from the JSON array */
+
+ broken:
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("query-named-block-nodes entry was not in expected
format"));
+ return -1;
+}
+
+
+virHashTablePtr
+qemuMonitorJSONBlockGetNamedNodeData(qemuMonitorPtr mon)
+{
+ g_autoptr(virJSONValue) nodes = NULL;
+ g_autoptr(virHashTable) ret = NULL;
+
+ if (!(nodes = qemuMonitorJSONQueryNamedBlockNodes(mon)))
+ return NULL;
+
+ if (!(ret = virHashNew((virHashDataFreeSimple)
qemuMonitorJSONBlockNamedNodeDataFree)))
+ return NULL;
+
+ if (virJSONValueArrayForeachSteal(nodes,
+
qemuMonitorJSONBlockGetNamedNodeDataWorker,
+ ret) < 0)
+ return NULL;
+
+ return g_steal_pointer(&ret);
+}
+
+
int qemuMonitorJSONBlockResize(qemuMonitorPtr mon,
const char *device,
const char *nodename,
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index 975de3759a..6ee3e912f9 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -87,6 +87,9 @@ int qemuMonitorJSONBlockStatsUpdateCapacity(qemuMonitorPtr
mon,
int qemuMonitorJSONBlockStatsUpdateCapacityBlockdev(qemuMonitorPtr mon,
virHashTablePtr stats);
+virHashTablePtr
+qemuMonitorJSONBlockGetNamedNodeData(qemuMonitorPtr mon);
+
int qemuMonitorJSONBlockResize(qemuMonitorPtr mon,
const char *device,
const char *nodename,
--
2.21.0
--
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