maxmem: introduces VIR_DOMAIN_MEM_MAXIMUM flag

This patch introduces VIR_DOMAIN_MEM_MAXIMUM flag.
Signed-off-by: NTaku Izumi <izumi.taku@jp.fujitsu.com>

include/libvirt/libvirt.h.in

@@ -857,6 +857,7 @@ typedef enum {
     VIR_DOMAIN_MEM_CURRENT = 0,        /* affect current domain state */
     VIR_DOMAIN_MEM_LIVE    = (1 << 0), /* affect active domain */
     VIR_DOMAIN_MEM_CONFIG  = (1 << 1), /* affect next boot */
+    VIR_DOMAIN_MEM_MAXIMUM = (1 << 2), /* affect Max rather than current */
 } virDomainMemoryModFlags;
 
 

src/libvirt.c

@@ -2832,6 +2832,8 @@ error:
  * (that is, @flags is VIR_DOMAIN_MEM_CURRENT), then an inactive domain
  * modifies persistent setup, while an active domain is hypervisor-dependent
  * on whether just live or both live and persistent state is changed.
+ * If VIR_DOMAIN_MEM_MAXIMUM is set, the change affects domain's maximum memory
+ * size rather than current memory size.
  * Not all hypervisors can support all flag combinations.
  *
  * Returns 0 in case of success, -1 in case of failure.