bitbake: hashserv: Add db-usage API

Adds an API to query the server for the usage of the database (e.g. how
many rows are present in each table)

(Bitbake rev: c9c1224447e147e0de92953bc85cea75670b898c)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/hashserv/server.py

@@ -249,6 +249,7 @@ class ServerClient(bb.asyncrpc.AsyncServerConnection):
                 "get-outhash": self.handle_get_outhash,
                 "get-stream": self.handle_get_stream,
                 "get-stats": self.handle_get_stats,
+                "get-db-usage": self.handle_get_db_usage,
                 # Not always read-only, but internally checks if the server is
                 # read-only
                 "report": self.handle_report,
@@ -567,6 +568,10 @@ class ServerClient(bb.asyncrpc.AsyncServerConnection):
         oldest = datetime.now() - timedelta(seconds=-max_age)
         return {"count": await self.db.clean_unused(oldest)}
 
+    @permissions(DB_ADMIN_PERM)
+    async def handle_get_db_usage(self, request):
+        return {"usage": await self.db.get_usage()}
+
     # The authentication API is always allowed
     async def handle_auth(self, request):
         username = str(request["username"])