[libvirt] [PATCH 2/6] domMemStats: Add public symbol to libvirt API

[Adam Litke]

Add a new function 'virDomainMemStats' to the libvirt API.  Export it via
libvirt_public.syms

Signed-off-by: Adam Litke <agl at us.ibm.com>
To: libvirt list <libvir-list at redhat.com>
---
 src/libvirt.c           |   50 +++++++++++++++++++++++++++++++++++++++++++++++
 src/libvirt_public.syms |    1 +
 2 files changed, 51 insertions(+), 0 deletions(-)

diff --git a/src/libvirt.c b/src/libvirt.c
index b14942d..d632bd7 100644
--- a/src/libvirt.c
+++ b/src/libvirt.c
@@ -4045,6 +4045,56 @@ error:
 }
 
 /**
+ * virDomainMemStats:
+ * @dom: pointer to the domain object
+ * @stats: memory stats structure (returned)
+ * @size: size of memory stats structure
+ * 
+ * This function returns memory statistics for the domain.
+ *
+ * Individual fields within the stats structure may be returned
+ * as -1, which indicates that the hypervisor or guest does not
+ * support that particular statistic.
+ *
+ * Returns: 0 in case of success or -1 in case of failure.
+ */
+int
+virDomainMemStats (virDomainPtr dom, virDomainMemStatsPtr stats,
+                   size_t size)
+{
+    virConnectPtr conn;
+    struct _virDomainMemStats stats2 = { -1, -1, -1, -1, -1, -1 };
+    DEBUG("domain=%p, stats=%p, size=%zi", dom, stats, size);
+
+    virResetLastError();
+
+    if (!VIR_IS_CONNECTED_DOMAIN (dom)) {
+        virLibDomainError (NULL, VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
+        return -1;
+    }
+    if (!stats || size > sizeof stats2) {
+        virLibDomainError (dom, VIR_ERR_INVALID_ARG, __FUNCTION__);
+        goto error;
+    }
+    conn = dom->conn;
+
+    if (conn->driver->domainMemStats) {
+        if (conn->driver->domainMemStats (dom, &stats2) == -1)
+            goto error;
+ 
+        memcpy (stats, &stats2, size);
+        return 0;
+    }
+
+    virLibDomainError (dom, VIR_ERR_NO_SUPPORT, __FUNCTION__);
+
+error:
+    /* Copy to connection error object for back compatability */
+    virSetConnError(dom->conn);
+    return -1;
+}
+
+/**
  * virDomainBlockPeek:
  * @dom: pointer to the domain object
  * @path: path to the block device
diff --git a/src/libvirt_public.syms b/src/libvirt_public.syms
index 8921c1a..009c0ba 100644
--- a/src/libvirt_public.syms
+++ b/src/libvirt_public.syms
@@ -327,6 +327,7 @@ LIBVIRT_0.7.2 {
 	virStreamAbort;
 	virStreamFree;
 	virDomainMigrateToURI;
+        virDomainMemStats;
 } LIBVIRT_0.7.1;
 
 # .... define new API here using predicted next version number ....
-- 
1.6.5