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FIX: NVS preferences being written even if unchanged (#3647)

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Javier Peletier 2022-07-25 00:10:37 +02:00 committed by GitHub
parent 578671ea94
commit f33d829ce9
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 18 additions and 6 deletions
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24
esphome/components/esp32/preferences.cpp
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@ -110,9 +110,11 @@ class ESP32Preferences : public ESPPreferences {
if (s_pending_save.empty()) if (s_pending_save.empty())
return true; return true;
ESP_LOGD(TAG, "Saving preferences to flash..."); ESP_LOGD(TAG, "Saving %d preferences to flash...", s_pending_save.size());
// goal try write all pending saves even if one fails // goal try write all pending saves even if one fails
bool any_failed = false; int cached = 0, written = 0, failed = 0;
esp_err_t last_err = ESP_OK;
std::string last_key{};
// go through vector from back to front (makes erase easier/more efficient) // go through vector from back to front (makes erase easier/more efficient)
for (ssize_t i = s_pending_save.size() - 1; i >= 0; i--) { for (ssize_t i = s_pending_save.size() - 1; i >= 0; i--) {
@ -124,14 +126,24 @@ class ESP32Preferences : public ESPPreferences {
if (err != 0) { if (err != 0) {
ESP_LOGV(TAG, "nvs_set_blob('%s', len=%u) failed: %s", save.key.c_str(), save.data.size(), ESP_LOGV(TAG, "nvs_set_blob('%s', len=%u) failed: %s", save.key.c_str(), save.data.size(),
esp_err_to_name(err)); esp_err_to_name(err));
any_failed = true; failed++;
last_err = err;
last_key = save.key;
continue; continue;
} }
written++;
} else { } else {
ESP_LOGD(TAG, "NVS data not changed skipping %s len=%u", save.key.c_str(), save.data.size()); ESP_LOGV(TAG, "NVS data not changed skipping %s len=%u", save.key.c_str(), save.data.size());
cached++;
} }
s_pending_save.erase(s_pending_save.begin() + i); s_pending_save.erase(s_pending_save.begin() + i);
} }
ESP_LOGD(TAG, "Saving %d preferences to flash: %d cached, %d written, %d failed", cached + written + failed, cached,
written, failed);
if (failed > 0) {
ESP_LOGD(TAG, "Error saving %d preferences to flash. Last error=%s for key=%s", failed, esp_err_to_name(last_err),
last_key.c_str());
}
// note: commit on esp-idf currently is a no-op, nvs_set_blob always writes // note: commit on esp-idf currently is a no-op, nvs_set_blob always writes
esp_err_t err = nvs_commit(nvs_handle); esp_err_t err = nvs_commit(nvs_handle);
@ -140,7 +152,7 @@ class ESP32Preferences : public ESPPreferences {
return false; return false;
} }
return !any_failed; return failed == 0;
} }
bool is_changed(const uint32_t nvs_handle, const NVSData &to_save) { bool is_changed(const uint32_t nvs_handle, const NVSData &to_save) {
NVSData stored_data{}; NVSData stored_data{};
@ -150,7 +162,7 @@ class ESP32Preferences : public ESPPreferences {
ESP_LOGV(TAG, "nvs_get_blob('%s'): %s - the key might not be set yet", to_save.key.c_str(), esp_err_to_name(err)); ESP_LOGV(TAG, "nvs_get_blob('%s'): %s - the key might not be set yet", to_save.key.c_str(), esp_err_to_name(err));
return true; return true;
} }
stored_data.data.reserve(actual_len); stored_data.data.resize(actual_len);
err = nvs_get_blob(nvs_handle, to_save.key.c_str(), stored_data.data.data(), &actual_len); err = nvs_get_blob(nvs_handle, to_save.key.c_str(), stored_data.data.data(), &actual_len);
if (err != 0) { if (err != 0) {
ESP_LOGV(TAG, "nvs_get_blob('%s') failed: %s", to_save.key.c_str(), esp_err_to_name(err)); ESP_LOGV(TAG, "nvs_get_blob('%s') failed: %s", to_save.key.c_str(), esp_err_to_name(err));