[libvirt] [PATCH 2/6] domMemoryStats: Add public symbol to libvirt API
Add a new function 'virDomainMemoryStats' to the libvirt API. Export it via
libvirt_public.syms
Signed-off-by: Adam Litke <agl(a)us.ibm.com>
To: Daniel Veillard <veillard(a)redhat.com>
Cc: Daniel P. Berrange <berrange(a)redhat.com>
Cc: libvirt list <libvir-list(a)redhat.com>
---
src/libvirt.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++
src/libvirt_public.syms | 1 +
2 files changed, 72 insertions(+), 0 deletions(-)
diff --git a/src/libvirt.c b/src/libvirt.c
index 103b331..298610d 100644
--- a/src/libvirt.c
+++ b/src/libvirt.c
@@ -4109,6 +4109,77 @@ error:
}
/**
+ * virDomainMemoryStats:
+ * @dom: pointer to the domain object
+ * @stats: nr_stats-sized array of stat structures (returned)
+ * @nr_stats: number of memory statistics requested
+ * @flags: unused, always pass 0
+ *
+ * This function provides memory statistics for the domain.
+ *
+ * Up to 'nr_stats' elements of 'stats' will be populated with memory
statistics
+ * from the domain. Only statistics supported by the domain, the driver, and
+ * this version of libvirt will be returned.
+ *
+ * Memory Statistics:
+ *
+ * VIR_DOMAIN_MEMORY_STAT_SWAP_IN:
+ * The total amount of data read from swap space (in kb).
+ * VIR_DOMAIN_MEMORY_STAT_SWAP_OUT:
+ * The total amount of memory written out to swap space (in kb).
+ * VIR_DOMAIN_MEMORY_STAT_MAJOR_FAULT:
+ * The number of page faults that required disk IO to service.
+ * VIR_DOMAIN_MEMORY_STAT_MINOR_FAULT:
+ * The number of page faults serviced without disk IO.
+ * VIR_DOMAIN_MEMORY_STAT_UNUSED:
+ * The amount of memory which is not being used for any purpose (in kb).
+ * VIR_DOMAIN_MEMORY_STAT_AVAILABLE:
+ * The total amount of memory available to the domain's OS (in kb).
+ *
+ * Returns: The number of stats provided or -1 in case of failure.
+ */
+int virDomainMemoryStats (virDomainPtr dom, virDomainMemoryStatPtr stats,
+ unsigned int nr_stats, unsigned int flags)
+{
+ virConnectPtr conn;
+ unsigned long nr_stats_ret = 0;
+ DEBUG("domain=%p, stats=%p, nr_stats=%u", dom, stats, nr_stats);
+
+ if (flags != 0) {
+ virLibDomainError (dom, VIR_ERR_INVALID_ARG,
+ _("flags must be zero"));
+ goto error;
+ }
+
+ virResetLastError();
+
+ if (!VIR_IS_CONNECTED_DOMAIN (dom)) {
+ virLibDomainError (NULL, VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
+ return -1;
+ }
+ if (!stats || nr_stats == 0)
+ return 0;
+
+ if (nr_stats > VIR_DOMAIN_MEMORY_STAT_NR)
+ nr_stats = VIR_DOMAIN_MEMORY_STAT_NR;
+
+ conn = dom->conn;
+ if (conn->driver->domainMemoryStats) {
+ nr_stats_ret = conn->driver->domainMemoryStats (dom, stats, nr_stats);
+ if (nr_stats_ret == -1)
+ goto error;
+ return nr_stats_ret;
+ }
+
+ 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 b4f57e7..c0c3693 100644
--- a/src/libvirt_public.syms
+++ b/src/libvirt_public.syms
@@ -341,6 +341,7 @@ LIBVIRT_0.7.3 {
virStoragePoolIsActive;
virStoragePoolIsPersistent;
virInterfaceIsActive;
+ virDomainMemoryStats;
} LIBVIRT_0.7.2;
# .... define new API here using predicted next version number ....
--
1.6.5