Make sure to unmount SPIFFS during OTA

components/ocs_system/CMakeLists.txt

@@ -23,6 +23,7 @@ idf_component_register(
     "target_esp32/native_updater.cpp"
     "target_esp32/partition_updater.cpp"
     "target_esp32/cache_updater.cpp"
+    "target_esp32/spiffs_updater.cpp"
 
     REQUIRES
     "esp_timer"

components/ocs_system/target_esp32/spiffs_updater.cpp

@@ -0,0 +1,51 @@
+/*
+ * SPDX-FileCopyrightText: 2025 Tendry Lab
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "freertos/FreeRTOSConfig.h"
+
+#include "esp_spiffs.h"
+
+#include "ocs_core/log.h"
+#include "ocs_system/target_esp32/spiffs_updater.h"
+
+namespace ocs {
+namespace system {
+
+namespace {
+
+const char* log_tag = "spiffs_updater";
+
+} // namespace
+
+SpiffsUpdater::SpiffsUpdater(IUpdater& updater, const char* partition_label)
+    : partition_label_(partition_label)
+    , updater_(updater) {
+}
+
+status::StatusCode SpiffsUpdater::begin(size_t total_size, uint32_t crc32) {
+    const auto err = esp_vfs_spiffs_unregister(partition_label_.c_str());
+    if (err != ESP_OK) {
+        ocs_loge(log_tag, "esp_vfs_spiffs_unregister(): %s", esp_err_to_name(err));
+
+        return status::StatusCode::Error;
+    }
+
+    return updater_.begin(total_size, crc32);
+}
+
+status::StatusCode SpiffsUpdater::write(const uint8_t* buf, size_t len) {
+    return updater_.write(buf, len);
+}
+
+status::StatusCode SpiffsUpdater::commit() {
+    return updater_.commit();
+}
+
+status::StatusCode SpiffsUpdater::end() {
+    return updater_.end();
+}
+
+} // namespace system
+} // namespace ocs

components/ocs_system/target_esp32/spiffs_updater.h

@@ -0,0 +1,44 @@
+/*
+ * SPDX-FileCopyrightText: 2025 Tendry Lab
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#pragma once
+
+#include <string>
+
+#include "ocs_core/noncopyable.h"
+#include "ocs_system/iupdater.h"
+
+namespace ocs {
+namespace system {
+
+class SpiffsUpdater : public IUpdater, private core::NonCopyable<> {
+public:
+    //! Initialize.
+    //!
+    //! @params
+    //!  - @p updater - to perform the actual update process.
+    //!  - @p partition_label - SPIFFS partition label.
+    SpiffsUpdater(IUpdater& updater, const char* partition_label);
+
+    //! Unmount SPIFFS partition and begin the firmware update process.
+    status::StatusCode begin(size_t total_size, uint32_t crc32) override;
+
+    //! Write firmware data.
+    status::StatusCode write(const uint8_t* buf, size_t len) override;
+
+    //! Commit firmware update.
+    status::StatusCode commit() override;
+
+    //! End firmware update.
+    status::StatusCode end() override;
+
+private:
+    const std::string partition_label_;
+
+    IUpdater& updater_;
+};
+
+} // namespace system
+} // namespace ocs