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feat(nvs): Optimize read-only NVS loading

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This commit is contained in:
Adam Múdry
2025-03-24 15:55:18 +01:00
parent 851e869bb2
commit 4a6b99bc4a
3 changed files with 61 additions and 63 deletions
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components/nvs_flash/src/nvs_pagemanager.cpp
+58 -56
View File
@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2015-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -56,77 +56,79 @@ esp_err_t PageManager::load(Partition *partition, uint32_t baseSector, uint32_t
// if power went out after a new item for the given key was written,
// but before the old one was erased, we end up with a duplicate item
Page& lastPage = back();
size_t lastItemIndex = SIZE_MAX;
Item item;
size_t itemIndex = 0;
while (lastPage.findItem(Page::NS_ANY, ItemType::ANY, nullptr, itemIndex, item) == ESP_OK) {
itemIndex += item.span;
lastItemIndex = itemIndex;
}
if (lastItemIndex != SIZE_MAX) {
auto last = PageManager::TPageListIterator(&lastPage);
TPageListIterator it;
for (it = begin(); it != last; ++it) {
if ((it->state() != Page::PageState::FREEING) &&
(it->eraseItem(item.nsIndex, item.datatype, item.key, item.chunkIndex) == ESP_OK)) {
break;
}
if (!partition->get_readonly()) {
Page& lastPage = back();
size_t lastItemIndex = SIZE_MAX;
Item item;
size_t itemIndex = 0;
while (lastPage.findItem(Page::NS_ANY, ItemType::ANY, nullptr, itemIndex, item) == ESP_OK) {
itemIndex += item.span;
lastItemIndex = itemIndex;
}
if ((it == last) && (item.datatype == ItemType::BLOB_IDX)) {
/* Rare case in which the blob was stored using old format, but power went just after writing
* blob index during modification. Loop again and delete the old version blob*/
if (lastItemIndex != SIZE_MAX) {
auto last = PageManager::TPageListIterator(&lastPage);
TPageListIterator it;
for (it = begin(); it != last; ++it) {
if ((it->state() != Page::PageState::FREEING) &&
(it->eraseItem(item.nsIndex, ItemType::BLOB, item.key, item.chunkIndex) == ESP_OK)) {
(it->eraseItem(item.nsIndex, item.datatype, item.key, item.chunkIndex) == ESP_OK)) {
break;
}
}
}
}
if ((it == last) && (item.datatype == ItemType::BLOB_IDX)) {
/* Rare case in which the blob was stored using old format, but power went just after writing
* blob index during modification. Loop again and delete the old version blob*/
for (it = begin(); it != last; ++it) {
// check if power went out while page was being freed
for (auto it = begin(); it!= end(); ++it) {
if (it->state() == Page::PageState::FREEING) {
Page* newPage = &mPageList.back();
if (newPage->state() == Page::PageState::ACTIVE) {
auto err = newPage->erase();
if ((it->state() != Page::PageState::FREEING) &&
(it->eraseItem(item.nsIndex, ItemType::BLOB, item.key, item.chunkIndex) == ESP_OK)) {
break;
}
}
}
}
// check if power went out while page was being freed
for (auto it = begin(); it!= end(); ++it) {
if (it->state() == Page::PageState::FREEING) {
Page* newPage = &mPageList.back();
if (newPage->state() == Page::PageState::ACTIVE) {
auto err = newPage->erase();
if (err != ESP_OK) {
return err;
}
mPageList.erase(newPage);
mFreePageList.push_back(newPage);
}
auto err = activatePage();
if (err != ESP_OK) {
return err;
}
mPageList.erase(newPage);
mFreePageList.push_back(newPage);
}
auto err = activatePage();
if (err != ESP_OK) {
return err;
}
newPage = &mPageList.back();
newPage = &mPageList.back();
err = it->copyItems(*newPage);
if (err != ESP_OK && err != ESP_ERR_NVS_NOT_FOUND) {
return err;
}
err = it->copyItems(*newPage);
if (err != ESP_OK && err != ESP_ERR_NVS_NOT_FOUND) {
return err;
}
err = it->erase();
if (err != ESP_OK) {
return err;
}
err = it->erase();
if (err != ESP_OK) {
return err;
}
Page* p = static_cast<Page*>(it);
mPageList.erase(it);
mFreePageList.push_back(p);
break;
Page* p = static_cast<Page*>(it);
mPageList.erase(it);
mFreePageList.push_back(p);
break;
}
}
}
// partition should have at least one free page if it is not read-only
if (!partition->get_readonly() && mFreePageList.empty()) {
return ESP_ERR_NVS_NO_FREE_PAGES;
// partition should have at least one free page if it is not read-only
if (mFreePageList.empty()) {
return ESP_ERR_NVS_NO_FREE_PAGES;
}
}
return ESP_OK;