stats info add cache/total cache field

Signed-off-by: NZhangxiaoyu <zhangxiaoyu58@huawei.com>

src/json/schema/container/info.json

@@ -43,6 +43,15 @@
     },
     "kmem_limit": {
       "type": "uint64"
+    },
+    "status": {
+      "type": "string"
+    },
+    "cache": {
+      "type": "uint64"
+    },
+    "cache_total": {
+      "type": "uint64"
     }
   }
 }

src/lcrcontainer.h

@@ -96,6 +96,9 @@ struct lcr_container_state {
     /* Kernel Memory usage */
     uint64_t kmem_used;
     uint64_t kmem_limit;
+    /* Cache usage */
+    uint64_t cache;
+    uint64_t cache_total;
 };
 
 typedef enum {

src/lcrcontainer_execute.c

@@ -546,6 +546,9 @@ void do_lcr_state(struct lxc_container *c, struct lcr_container_state *lcs)
     lcs->mem_limit = stat_get_ull(c, "memory.limit_in_bytes");
     lcs->kmem_used = stat_get_ull(c, "memory.kmem.usage_in_bytes");
     lcs->kmem_limit = stat_get_ull(c, "memory.kmem.limit_in_bytes");
+
+    lcs->cache = stat_match_get_ull(c, "memory.stat", "cache", 1);
+    lcs->cache_total = stat_match_get_ull(c, "memory.stat", "total_cache", 1);
 }
 
 #define ExitSignalOffset 128