tools: split out the update handler
Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I367ea961c98ec822d3200d101c4f5977d77e7402
diff --git a/tools/helper.cpp b/tools/helper.cpp
new file mode 100644
index 0000000..ad2c60d
--- /dev/null
+++ b/tools/helper.cpp
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2019 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "helper.hpp"
+
+#include "status.hpp"
+#include "tool_errors.hpp"
+
+#include <chrono>
+#include <ipmiblob/blob_errors.hpp>
+#include <thread>
+
+namespace host_tool
+{
+
+/* Poll an open verification session. Handling closing the session is not yet
+ * owned by this method.
+ */
+bool pollStatus(std::uint16_t session, ipmiblob::BlobInterface* blob)
+{
+ using namespace std::chrono_literals;
+
+ static constexpr auto verificationSleep = 5s;
+ ipmi_flash::ActionStatus result = ipmi_flash::ActionStatus::unknown;
+
+ try
+ {
+ static constexpr int commandAttempts = 20;
+ int attempts = 0;
+ bool exitLoop = false;
+
+ /* Reach back the current status from the verification service output.
+ */
+ while (attempts++ < commandAttempts)
+ {
+ ipmiblob::StatResponse resp = blob->getStat(session);
+
+ if (resp.metadata.size() != sizeof(std::uint8_t))
+ {
+ /* TODO: How do we want to handle the verification failures,
+ * because closing the session to the verify blob has a special
+ * as-of-yet not fully defined behavior.
+ */
+ std::fprintf(stderr, "Received invalid metadata response!!!\n");
+ }
+
+ result = static_cast<ipmi_flash::ActionStatus>(resp.metadata[0]);
+
+ switch (result)
+ {
+ case ipmi_flash::ActionStatus::failed:
+ std::fprintf(stderr, "failed\n");
+ exitLoop = true;
+ break;
+ case ipmi_flash::ActionStatus::unknown:
+ std::fprintf(stderr, "other\n");
+ break;
+ case ipmi_flash::ActionStatus::running:
+ std::fprintf(stderr, "running\n");
+ break;
+ case ipmi_flash::ActionStatus::success:
+ std::fprintf(stderr, "success\n");
+ exitLoop = true;
+ break;
+ default:
+ std::fprintf(stderr, "wat\n");
+ }
+
+ if (exitLoop)
+ {
+ break;
+ }
+ std::this_thread::sleep_for(verificationSleep);
+ }
+ }
+ catch (const ipmiblob::BlobException& b)
+ {
+ throw ToolException("blob exception received: " +
+ std::string(b.what()));
+ }
+
+ /* TODO: If this is reached and it's not success, it may be worth just
+ * throwing a ToolException with a timeout message specifying the final
+ * read's value.
+ *
+ * TODO: Given that excepting from certain points leaves the BMC update
+ * state machine in an inconsistent state, we need to carefully evaluate
+ * which exceptions from the lower layers allow one to try and delete the
+ * blobs to rollback the state and progress.
+ */
+ return (result == ipmi_flash::ActionStatus::success);
+}
+
+} // namespace host_tool