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/*
* SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "nvs_storage.hpp"
#if __has_include(<bsd/string.h>)
// for strlcpy
#include <bsd/string.h>
#endif
#ifndef ESP_PLATFORM
// We need NO_DEBUG_STORAGE here since the integration tests on the host add some debug code.
// The unit tests, however, don't want debug code since they check the behavior via data in/output and disturb
// the order of calling mocked functions.
#ifndef NO_DEBUG_STORAGE
#include <map>
#include <sstream>
#define DEBUG_STORAGE
#endif
#endif // !ESP_PLATFORM
#include "esp_log.h"
#include "spi_flash_mmap.h"
#define TAG "nvs_storage"
#if defined(SEGGER_H) && defined(GLOBAL_H)
NVS_GUARD_SYSVIEW_MACRO_EXPANSION_PUSH();
#undef U8
#undef I8
#undef U16
#undef I16
#undef U32
#undef I32
#undef U64
#undef I64
#endif
namespace nvs
{
Storage::~Storage()
{
clearNamespaces();
}
void Storage::clearNamespaces()
{
mNamespaces.clearAndFreeNodes();
}
esp_err_t Storage::populateBlobIndices(TBlobIndexList& blobIdxList)
{
for (auto it = mPageManager.begin(); it != mPageManager.end(); ++it) {
Page& p = *it;
size_t itemIndex = 0;
Item item;
/* If the power went off just after writing a blob index, the duplicate detection
* logic in pagemanager will remove the earlier index. So we should never find a
* duplicate index at this point */
while (p.findItem(Page::NS_ANY, ItemType::BLOB_IDX, nullptr, itemIndex, item) == ESP_OK) {
BlobIndexNode* entry = new (std::nothrow) BlobIndexNode;
if (!entry) return ESP_ERR_NO_MEM;
item.getKey(entry->key, sizeof(entry->key));
entry->nsIndex = item.nsIndex;
entry->chunkStart = item.blobIndex.chunkStart;
entry->chunkCount = item.blobIndex.chunkCount;
entry->dataSize = item.blobIndex.dataSize;
entry->observedDataSize = 0;
entry->observedChunkCount = 0;
blobIdxList.push_back(entry);
itemIndex += item.span;
}
}
return ESP_OK;
}
// Check BLOB_DATA entries belonging to BLOB_INDEX entries for mismatched records.
// BLOB_INDEX record is compared with information collected from BLOB_DATA records
// matched using namespace index, key and chunk version. Mismatched summary length
// or wrong number of chunks are checked. Mismatched BLOB_INDEX data are deleted
// and removed from the blobIdxList. The BLOB_DATA are left as orphans and removed
// later by the call to eraseOrphanDataBlobs().
void Storage::eraseMismatchedBlobIndexes(TBlobIndexList& blobIdxList)
{
for (auto it = mPageManager.begin(); it != mPageManager.end(); ++it) {
Page& p = *it;
size_t itemIndex = 0;
Item item;
/* Chunks with same <ns,key> and with chunkIndex in the following ranges
* belong to same family.
* 1) VER_0_OFFSET <= chunkIndex < VER_1_OFFSET-1 => Version0 chunks
* 2) VER_1_OFFSET <= chunkIndex < VER_ANY => Version1 chunks
*/
while (p.findItem(Page::NS_ANY, ItemType::BLOB_DATA, nullptr, itemIndex, item) == ESP_OK) {
auto iter = std::find_if(blobIdxList.begin(),
blobIdxList.end(),
[=] (const BlobIndexNode& e) -> bool
{return (strncmp(item.key, e.key, sizeof(e.key) - 1) == 0)
&& (item.nsIndex == e.nsIndex)
&& (item.chunkIndex >= static_cast<uint8_t> (e.chunkStart))
&& (item.chunkIndex < static_cast<uint8_t> ((e.chunkStart == nvs::VerOffset::VER_0_OFFSET) ? nvs::VerOffset::VER_1_OFFSET : nvs::VerOffset::VER_ANY));});
if (iter != std::end(blobIdxList)) {
// accumulate the size
iter->observedDataSize += item.varLength.dataSize;
iter->observedChunkCount++;
}
itemIndex += item.span;
}
}
auto iter = blobIdxList.begin();
while (iter != blobIdxList.end())
{
if ( (iter->observedDataSize != iter->dataSize) || (iter->observedChunkCount != iter->chunkCount) )
{
// Delete blob_index from flash
// This is very rare case, so we can loop over all pages
for (auto it = mPageManager.begin(); it != mPageManager.end(); ++it) {
// skip pages in non eligible states
if (it->state() == nvs::Page::PageState::CORRUPT
|| it->state() == nvs::Page::PageState::INVALID
|| it->state() == nvs::Page::PageState::UNINITIALIZED){
continue;
}
Page& p = *it;
if(p.eraseItem(iter->nsIndex, nvs::ItemType::BLOB_IDX, iter->key, 255, iter->chunkStart) == ESP_OK){
break;
}
}
// Delete blob index from the blobIdxList
auto tmp = iter;
++iter;
blobIdxList.erase(tmp);
delete (nvs::Storage::BlobIndexNode*)tmp;
}
else
{
// Blob index OK
++iter;
}
}
}
void Storage::eraseOrphanDataBlobs(TBlobIndexList& blobIdxList)
{
for (auto it = mPageManager.begin(); it != mPageManager.end(); ++it) {
Page& p = *it;
size_t itemIndex = 0;
Item item;
/* Chunks with same <ns,key> and with chunkIndex in the following ranges
* belong to same family.
* 1) VER_0_OFFSET <= chunkIndex < VER_1_OFFSET-1 => Version0 chunks
* 2) VER_1_OFFSET <= chunkIndex < VER_ANY => Version1 chunks
*/
while (p.findItem(Page::NS_ANY, ItemType::BLOB_DATA, nullptr, itemIndex, item) == ESP_OK) {
auto iter = std::find_if(blobIdxList.begin(),
blobIdxList.end(),
[=] (const BlobIndexNode& e) -> bool
{return (strncmp(item.key, e.key, sizeof(e.key) - 1) == 0)
&& (item.nsIndex == e.nsIndex)
&& (item.chunkIndex >= static_cast<uint8_t> (e.chunkStart))
&& (item.chunkIndex < static_cast<uint8_t> (e.chunkStart) + e.chunkCount);});
if (iter == std::end(blobIdxList)) {
p.eraseItem(item.nsIndex, item.datatype, item.key, item.chunkIndex);
}
itemIndex += item.span;
}
}
}
esp_err_t Storage::init(uint32_t baseSector, uint32_t sectorCount)
{
auto err = mPageManager.load(mPartition, baseSector, sectorCount);
if (err != ESP_OK) {
mState = StorageState::INVALID;
return err;
}
// load namespaces list
clearNamespaces();
std::fill_n(mNamespaceUsage.data(), mNamespaceUsage.byteSize() / 4, 0);
for (auto it = mPageManager.begin(); it != mPageManager.end(); ++it) {
Page& p = *it;
size_t itemIndex = 0;
Item item;
while (p.findItem(Page::NS_INDEX, ItemType::U8, nullptr, itemIndex, item) == ESP_OK) {
NamespaceEntry* entry = new (std::nothrow) NamespaceEntry;
if (!entry) {
mState = StorageState::INVALID;
return ESP_ERR_NO_MEM;
}
item.getKey(entry->mName, sizeof(entry->mName));
err = item.getValue(entry->mIndex);
if (err != ESP_OK) {
delete entry;
return err;
}
if (mNamespaceUsage.set(entry->mIndex, true) != ESP_OK) {
delete entry;
return ESP_FAIL;
}
mNamespaces.push_back(entry);
itemIndex += item.span;
}
}
if (mNamespaceUsage.set(0, true) != ESP_OK) {
return ESP_FAIL;
}
if (mNamespaceUsage.set(255, true) != ESP_OK) {
return ESP_FAIL;
}
// Populate list of multi-page index entries.
TBlobIndexList blobIdxList;
err = populateBlobIndices(blobIdxList);
if (err != ESP_OK) {
mState = StorageState::INVALID;
return ESP_ERR_NO_MEM;
}
// remove blob indexes with mismatched blob data length or chunk count
eraseMismatchedBlobIndexes(blobIdxList);
// Remove the entries for which there is no parent multi-page index.
eraseOrphanDataBlobs(blobIdxList);
// Purge the blob index list
blobIdxList.clearAndFreeNodes();
mState = StorageState::ACTIVE;
#ifdef DEBUG_STORAGE
debugCheck();
#endif
return ESP_OK;
}
bool Storage::isValid() const
{
return mState == StorageState::ACTIVE;
}
esp_err_t Storage::findItem(uint8_t nsIndex, ItemType datatype, const char* key, Page* &page, Item& item, uint8_t chunkIdx, VerOffset chunkStart)
{
for (auto it = std::begin(mPageManager); it != std::end(mPageManager); ++it) {
size_t itemIndex = 0;
auto err = it->findItem(nsIndex, datatype, key, itemIndex, item, chunkIdx, chunkStart);
if (err == ESP_OK) {
page = it;
return ESP_OK;
}
}
return ESP_ERR_NVS_NOT_FOUND;
}
esp_err_t Storage::writeMultiPageBlob(uint8_t nsIndex, const char* key, const void* data, size_t dataSize, VerOffset chunkStart)
{
uint8_t chunkCount = 0;
TUsedPageList usedPages;
size_t remainingSize = dataSize;
size_t offset = 0;
esp_err_t err = ESP_OK;
/* Check how much maximum data can be accommodated**/
uint32_t max_pages = mPageManager.getPageCount() - 1;
if(max_pages > (Page::CHUNK_ANY-1)/2) {
max_pages = (Page::CHUNK_ANY-1)/2;
}
if (dataSize > max_pages * Page::CHUNK_MAX_SIZE) {
return ESP_ERR_NVS_VALUE_TOO_LONG;
}
do {
Page& page = getCurrentPage();
size_t tailroom = page.getVarDataTailroom();
size_t chunkSize = 0;
if (chunkCount == 0U && ((tailroom < dataSize) || (tailroom == 0 && dataSize == 0)) && tailroom < Page::CHUNK_MAX_SIZE/10) {
/** This is the first chunk and tailroom is too small ***/
if (page.state() != Page::PageState::FULL) {
err = page.markFull();
if (err != ESP_OK) {
return err;
}
}
err = mPageManager.requestNewPage();
if (err != ESP_OK) {
return err;
} else if(getCurrentPage().getVarDataTailroom() == tailroom) {
/* We got the same page or we are not improving.*/
return ESP_ERR_NVS_NOT_ENOUGH_SPACE;
} else {
continue;
}
} else if (!tailroom) {
err = ESP_ERR_NVS_NOT_ENOUGH_SPACE;
break;
}
/* Split the blob into two and store the chunk of available size onto the current page */
NVS_ASSERT_OR_RETURN(tailroom != 0, ESP_FAIL);
chunkSize = (remainingSize > tailroom)? tailroom : remainingSize;
remainingSize -= chunkSize;
err = page.writeItem(nsIndex, ItemType::BLOB_DATA, key,
static_cast<const uint8_t*> (data) + offset, chunkSize, static_cast<uint8_t> (chunkStart) + chunkCount);
chunkCount++;
if (err != ESP_OK) {
NVS_ASSERT_OR_RETURN(err != ESP_ERR_NVS_PAGE_FULL, err);
break;
} else {
UsedPageNode* node = new (std::nothrow) UsedPageNode();
if (!node) {
err = ESP_ERR_NO_MEM;
break;
}
node->mPage = &page;
usedPages.push_back(node);
if (remainingSize || (tailroom - chunkSize) < Page::ENTRY_SIZE) {
if (page.state() != Page::PageState::FULL) {
err = page.markFull();
if (err != ESP_OK) {
break;
}
}
err = mPageManager.requestNewPage();
if (err != ESP_OK) {
break;
}
}
}
offset += chunkSize;
if (!remainingSize) {
/* All pages are stored. Now store the index.*/
Item item;
std::fill_n(item.data, sizeof(item.data), 0xff);
item.blobIndex.dataSize = dataSize;
item.blobIndex.chunkCount = chunkCount;
item.blobIndex.chunkStart = chunkStart;
err = getCurrentPage().writeItem(nsIndex, ItemType::BLOB_IDX, key, item.data, sizeof(item.data));
NVS_ASSERT_OR_RETURN(err != ESP_ERR_NVS_PAGE_FULL, err);
break;
}
} while (1);
if (err != ESP_OK) {
/* Anything failed, then we should erase all the written chunks*/
int ii=0;
for (auto it = std::begin(usedPages); it != std::end(usedPages); it++) {
it->mPage->eraseItem(nsIndex, ItemType::BLOB_DATA, key, ii++);
}
}
usedPages.clearAndFreeNodes();
return err;
}
esp_err_t Storage::writeItem(uint8_t nsIndex, ItemType datatype, const char* key, const void* data, size_t dataSize)
{
if (mState != StorageState::ACTIVE) {
return ESP_ERR_NVS_NOT_INITIALIZED;
}
Page* findPage = nullptr;
bool matchedTypePageFound = false;
Item item;
esp_err_t err;
if (datatype == ItemType::BLOB) {
err = findItem(nsIndex, ItemType::BLOB_IDX, key, findPage, item);
if(err == ESP_OK) {
matchedTypePageFound = true;
}
} else {
#ifdef CONFIG_NVS_LEGACY_DUP_KEYS_COMPATIBILITY
err = findItem(nsIndex, datatype, key, findPage, item);
if(err == ESP_OK && findPage != nullptr) {
matchedTypePageFound = true;
}
#else
err = findItem(nsIndex, ItemType::ANY, key, findPage, item);
if(err == ESP_OK && datatype == item.datatype) {
matchedTypePageFound = true;
}
#endif
}
if (err != ESP_OK && err != ESP_ERR_NVS_NOT_FOUND) {
return err;
}
if (datatype == ItemType::BLOB) {
VerOffset prevStart, nextStart;
prevStart = nextStart = VerOffset::VER_0_OFFSET;
if (matchedTypePageFound) {
// Do a sanity check that the item in question is actually being modified.
// If it isn't, it is cheaper to purposefully not write out new data.
// since it may invoke an erasure of flash.
if (cmpMultiPageBlob(nsIndex, key, data, dataSize) == ESP_OK) {
return ESP_OK;
}
if (findPage->state() == Page::PageState::UNINITIALIZED ||
findPage->state() == Page::PageState::INVALID) {
err = findItem(nsIndex, datatype, key, findPage, item);
if (err != ESP_OK) {
return err;
}
}
/* Get the version of the previous index with same <ns,key> */
prevStart = item.blobIndex.chunkStart;
NVS_ASSERT_OR_RETURN(prevStart == VerOffset::VER_0_OFFSET || prevStart == VerOffset::VER_1_OFFSET, ESP_FAIL);
/* Toggle the version by changing the offset */
nextStart
= (prevStart == VerOffset::VER_1_OFFSET) ? VerOffset::VER_0_OFFSET : VerOffset::VER_1_OFFSET;
}
/* Write the blob with new version*/
err = writeMultiPageBlob(nsIndex, key, data, dataSize, nextStart);
if (err == ESP_ERR_NVS_PAGE_FULL) {
return ESP_ERR_NVS_NOT_ENOUGH_SPACE;
}
if (err != ESP_OK) {
return err;
}
if (matchedTypePageFound) {
/* Erase the blob with earlier version*/
err = eraseMultiPageBlob(nsIndex, key, prevStart);
if (err == ESP_ERR_FLASH_OP_FAIL) {
return ESP_ERR_NVS_REMOVE_FAILED;
}
if (err != ESP_OK) {
return err;
}
findPage = nullptr;
} else {
/* Support for earlier versions where BLOBS were stored without index */
err = findItem(nsIndex, datatype, key, findPage, item);
if (err != ESP_OK && err != ESP_ERR_NVS_NOT_FOUND) {
return err;
}
}
} else {
// Do a sanity check that the item in question is actually being modified.
// If it isn't, it is cheaper to purposefully not write out new data.
// since it may invoke an erasure of flash.
if (matchedTypePageFound &&
findPage->cmpItem(nsIndex, datatype, key, data, dataSize) == ESP_OK) {
return ESP_OK;
}
Page& page = getCurrentPage();
err = page.writeItem(nsIndex, datatype, key, data, dataSize);
if (err == ESP_ERR_NVS_PAGE_FULL) {
if (page.state() != Page::PageState::FULL) {
err = page.markFull();
if (err != ESP_OK) {
return err;
}
}
err = mPageManager.requestNewPage();
if (err != ESP_OK) {
return err;
}
err = getCurrentPage().writeItem(nsIndex, datatype, key, data, dataSize);
if (err == ESP_ERR_NVS_PAGE_FULL) {
return ESP_ERR_NVS_NOT_ENOUGH_SPACE;
}
if (err != ESP_OK) {
return err;
}
} else if (err != ESP_OK) {
return err;
}
}
if (findPage) {
if (findPage->state() == Page::PageState::UNINITIALIZED ||
findPage->state() == Page::PageState::INVALID) {
#ifdef CONFIG_NVS_LEGACY_DUP_KEYS_COMPATIBILITY
err = findItem(nsIndex, datatype, key, findPage, item);
#else
err = findItem(nsIndex, ItemType::ANY, key, findPage, item);
#endif
if (err != ESP_OK) {
return err;
}
}
#ifdef CONFIG_NVS_LEGACY_DUP_KEYS_COMPATIBILITY
err = findPage->eraseItem(nsIndex, datatype, key);
#else
err = findPage->eraseItem(nsIndex, ItemType::ANY, key);
#endif
if (err == ESP_ERR_FLASH_OP_FAIL) {
return ESP_ERR_NVS_REMOVE_FAILED;
}
if (err != ESP_OK) {
return err;
}
}
#ifdef DEBUG_STORAGE
debugCheck();
#endif
return ESP_OK;
}
esp_err_t Storage::createOrOpenNamespace(const char* nsName, bool canCreate, uint8_t& nsIndex)
{
if (mState != StorageState::ACTIVE) {
return ESP_ERR_NVS_NOT_INITIALIZED;
}
auto it = std::find_if(mNamespaces.begin(), mNamespaces.end(), [=] (const NamespaceEntry& e) -> bool {
return strncmp(nsName, e.mName, sizeof(e.mName) - 1) == 0;
});
if (it == std::end(mNamespaces)) {
if (!canCreate) {
return ESP_ERR_NVS_NOT_FOUND;
}
uint8_t ns;
bool ns_state;
for (ns = 1; ns < 255; ++ns) {
if (mNamespaceUsage.get(ns, &ns_state) != ESP_OK) {
return ESP_FAIL;
}
if (!ns_state) {
break;
}
}
if (ns == 255) {
return ESP_ERR_NVS_NOT_ENOUGH_SPACE;
}
auto err = writeItem(Page::NS_INDEX, ItemType::U8, nsName, &ns, sizeof(ns));
if (err != ESP_OK) {
return err;
}
if (mNamespaceUsage.set(ns, true) != ESP_OK) {
return ESP_FAIL;
}
nsIndex = ns;
NamespaceEntry* entry = new (std::nothrow) NamespaceEntry;
if (!entry) {
return ESP_ERR_NO_MEM;
}
entry->mIndex = ns;
strncpy(entry->mName, nsName, sizeof(entry->mName) - 1);
entry->mName[sizeof(entry->mName) - 1] = 0;
mNamespaces.push_back(entry);
} else {
nsIndex = it->mIndex;
}
return ESP_OK;
}
esp_err_t Storage::readMultiPageBlob(uint8_t nsIndex, const char* key, void* data, size_t dataSize)
{
Item item;
Page* findPage = nullptr;
/* First read the blob index */
auto err = findItem(nsIndex, ItemType::BLOB_IDX, key, findPage, item);
if (err != ESP_OK) {
return err;
}
uint8_t chunkCount = item.blobIndex.chunkCount;
VerOffset chunkStart = item.blobIndex.chunkStart;
size_t offset = 0;
NVS_ASSERT_OR_RETURN(dataSize == item.blobIndex.dataSize, ESP_FAIL);
/* Now read corresponding chunks */
for (uint8_t chunkNum = 0; chunkNum < chunkCount; chunkNum++) {
err = findItem(nsIndex, ItemType::BLOB_DATA, key, findPage, item, static_cast<uint8_t> (chunkStart) + chunkNum);
if (err != ESP_OK) {
if (err == ESP_ERR_NVS_NOT_FOUND) {
break;
}
return err;
}
if (item.varLength.dataSize > dataSize - offset) {
/* The size of the entry in the index is inconsistent with the sum of the sizes of chunks */
err = ESP_ERR_NVS_INVALID_LENGTH;
break;
}
err = findPage->readItem(nsIndex, ItemType::BLOB_DATA, key, static_cast<uint8_t*>(data) + offset, item.varLength.dataSize, static_cast<uint8_t> (chunkStart) + chunkNum);
if (err != ESP_OK) {
return err;
}
NVS_ASSERT_OR_RETURN(static_cast<uint8_t> (chunkStart) + chunkNum == item.chunkIndex, ESP_FAIL);
offset += item.varLength.dataSize;
}
if (err == ESP_ERR_NVS_NOT_FOUND || err == ESP_ERR_NVS_INVALID_LENGTH) {
// cleanup if a chunk is not found or the size is inconsistent
eraseMultiPageBlob(nsIndex, key);
}
NVS_ASSERT_OR_RETURN(offset == dataSize, ESP_FAIL);
return err;
}
esp_err_t Storage::cmpMultiPageBlob(uint8_t nsIndex, const char* key, const void* data, size_t dataSize)
{
Item item;
Page* findPage = nullptr;
/* First read the blob index */
auto err = findItem(nsIndex, ItemType::BLOB_IDX, key, findPage, item);
if (err != ESP_OK) {
return err;
}
uint8_t chunkCount = item.blobIndex.chunkCount;
VerOffset chunkStart = item.blobIndex.chunkStart;
size_t readSize = item.blobIndex.dataSize;
size_t offset = 0;
if (dataSize != readSize) {
return ESP_ERR_NVS_CONTENT_DIFFERS;
}
/* Now read corresponding chunks */
for (uint8_t chunkNum = 0; chunkNum < chunkCount; chunkNum++) {
err = findItem(nsIndex, ItemType::BLOB_DATA, key, findPage, item, static_cast<uint8_t> (chunkStart) + chunkNum);
if (err != ESP_OK) {
if (err == ESP_ERR_NVS_NOT_FOUND) {
break;
}
return err;
}
err = findPage->cmpItem(nsIndex, ItemType::BLOB_DATA, key, static_cast<const uint8_t*>(data) + offset, item.varLength.dataSize, static_cast<uint8_t> (chunkStart) + chunkNum);
if (err != ESP_OK) {
return err;
}
NVS_ASSERT_OR_RETURN(static_cast<uint8_t> (chunkStart) + chunkNum == item.chunkIndex, ESP_FAIL);
offset += item.varLength.dataSize;
}
NVS_ASSERT_OR_RETURN(offset == dataSize, ESP_FAIL);
return err;
}
esp_err_t Storage::readItem(uint8_t nsIndex, ItemType datatype, const char* key, void* data, size_t dataSize)
{
if (mState != StorageState::ACTIVE) {
return ESP_ERR_NVS_NOT_INITIALIZED;
}
Item item;
Page* findPage = nullptr;
if (datatype == ItemType::BLOB) {
auto err = readMultiPageBlob(nsIndex, key, data, dataSize);
if (err != ESP_ERR_NVS_NOT_FOUND) {
return err;
} // else check if the blob is stored with earlier version format without index
}
auto err = findItem(nsIndex, datatype, key, findPage, item);
if (err != ESP_OK) {
return err;
}
return findPage->readItem(nsIndex, datatype, key, data, dataSize);
}
esp_err_t Storage::eraseMultiPageBlob(uint8_t nsIndex, const char* key, VerOffset chunkStart)
{
if (mState != StorageState::ACTIVE) {
return ESP_ERR_NVS_NOT_INITIALIZED;
}
Item item;
Page* findPage = nullptr;
auto err = findItem(nsIndex, ItemType::BLOB_IDX, key, findPage, item, Page::CHUNK_ANY, chunkStart);
if (err != ESP_OK) {
return err;
}
// Erase the index first and make children blobs orphan
err = findPage->eraseItem(nsIndex, ItemType::BLOB_IDX, key, Page::CHUNK_ANY, chunkStart);
if (err != ESP_OK) {
return err;
}
// If caller requires delete of VER_ANY
// We may face dirty NVS partition and version duplicates can be there
// Make second attempt to delete index and ignore eventual not found
if(chunkStart == VerOffset::VER_ANY)
{
err = findItem(nsIndex, ItemType::BLOB_IDX, key, findPage, item, Page::CHUNK_ANY, chunkStart);
if (err == ESP_OK) {
err = findPage->eraseItem(nsIndex, ItemType::BLOB_IDX, key, Page::CHUNK_ANY, chunkStart);
if (err != ESP_OK) {
return err;
}
} else if (err != ESP_ERR_NVS_NOT_FOUND) {
return err;
}
}
// setup limits for chunkIndex-es to be deleted
uint8_t minChunkIndex = (uint8_t) VerOffset::VER_0_OFFSET;
uint8_t maxChunkIndex = (uint8_t) VerOffset::VER_ANY;
if(chunkStart == VerOffset::VER_0_OFFSET) {
maxChunkIndex = (uint8_t) VerOffset::VER_1_OFFSET;
} else if (chunkStart == VerOffset::VER_1_OFFSET) {
minChunkIndex = (uint8_t) VerOffset::VER_1_OFFSET;
}
for (auto it = std::begin(mPageManager); it != std::end(mPageManager); ++it) {
size_t itemIndex = 0;
do {
err = it->findItem(nsIndex, ItemType::BLOB_DATA, key, itemIndex, item);
if (err == ESP_ERR_NVS_NOT_FOUND) {
break;
} else if (err == ESP_OK) {
// check if item.chunkIndex is within the version range indicated by chunkStart, if so, delete it
if((item.chunkIndex >= minChunkIndex) && (item.chunkIndex < maxChunkIndex)) {
err = it->eraseEntryAndSpan(itemIndex);
}
// continue findItem until end of page
itemIndex += item.span;
}
if(err != ESP_OK) {
return err;
}
} while (err == ESP_OK && itemIndex < Page::ENTRY_COUNT);
}
return ESP_OK;
}
esp_err_t Storage::eraseItem(uint8_t nsIndex, ItemType datatype, const char* key)
{
if (mState != StorageState::ACTIVE) {
return ESP_ERR_NVS_NOT_INITIALIZED;
}
if (datatype == ItemType::BLOB) {
return eraseMultiPageBlob(nsIndex, key);
}
Item item;
Page* findPage = nullptr;
auto err = findItem(nsIndex, datatype, key, findPage, item);
if (err != ESP_OK) {
return err;
}
if (item.datatype == ItemType::BLOB_DATA || item.datatype == ItemType::BLOB_IDX) {
return eraseMultiPageBlob(nsIndex, key);
}
return findPage->eraseItem(nsIndex, datatype, key);
}
esp_err_t Storage::eraseNamespace(uint8_t nsIndex)
{
if (mState != StorageState::ACTIVE) {
return ESP_ERR_NVS_NOT_INITIALIZED;
}
for (auto it = std::begin(mPageManager); it != std::end(mPageManager); ++it) {
while (true) {
auto err = it->eraseItem(nsIndex, ItemType::ANY, nullptr);
if (err == ESP_ERR_NVS_NOT_FOUND) {
break;
}
else if (err != ESP_OK) {
return err;
}
}
}
return ESP_OK;
}
esp_err_t Storage::findKey(const uint8_t nsIndex, const char* key, ItemType* datatype)
{
if (mState != StorageState::ACTIVE) {
return ESP_ERR_NVS_NOT_INITIALIZED;
}
Item item;
Page* findPage = nullptr;
auto err = findItem(nsIndex, ItemType::ANY, key, findPage, item);
if (err != ESP_OK) {
return err;
}
if(datatype != nullptr) {
*datatype = item.datatype;
}
return err;
}
esp_err_t Storage::getItemDataSize(uint8_t nsIndex, ItemType datatype, const char* key, size_t& dataSize)
{
if (mState != StorageState::ACTIVE) {
return ESP_ERR_NVS_NOT_INITIALIZED;
}
Item item;
Page* findPage = nullptr;
auto err = findItem(nsIndex, datatype, key, findPage, item);
if (err != ESP_OK) {
if (datatype != ItemType::BLOB) {
return err;
}
err = findItem(nsIndex, ItemType::BLOB_IDX, key, findPage, item);
if (err != ESP_OK) {
return err;
}
dataSize = item.blobIndex.dataSize;
return ESP_OK;
}
dataSize = item.varLength.dataSize;
return ESP_OK;
}
void Storage::debugDump()
{
for (auto p = mPageManager.begin(); p != mPageManager.end(); ++p) {
p->debugDump();
}
}
#ifdef DEBUG_STORAGE
void Storage::debugCheck()
{
std::map<std::string, Page*> keys;
for (auto p = mPageManager.begin(); p != mPageManager.end(); ++p) {
size_t itemIndex = 0;
size_t usedCount = 0;
Item item;
while (p->findItem(Page::NS_ANY, ItemType::ANY, nullptr, itemIndex, item) == ESP_OK) {
std::stringstream keyrepr;
keyrepr << static_cast<unsigned>(item.nsIndex) << "_" << static_cast<unsigned>(item.datatype) << "_" << item.key <<"_"<<static_cast<unsigned>(item.chunkIndex);
std::string keystr = keyrepr.str();
if (keys.find(keystr) != std::end(keys)) {
printf("Duplicate key: %s\n", keystr.c_str());
debugDump();
assert(0);
}
keys.insert(std::make_pair(keystr, static_cast<Page*>(p)));
itemIndex += item.span;
usedCount += item.span;
}
assert(usedCount == p->getUsedEntryCount());
}
}
#endif //DEBUG_STORAGE
esp_err_t Storage::fillStats(nvs_stats_t& nvsStats)
{
nvsStats.namespace_count = mNamespaces.size();
return mPageManager.fillStats(nvsStats);
}
esp_err_t Storage::calcEntriesInNamespace(uint8_t nsIndex, size_t& usedEntries)
{
usedEntries = 0;
if (mState != StorageState::ACTIVE) {
return ESP_ERR_NVS_NOT_INITIALIZED;
}
for (auto it = std::begin(mPageManager); it != std::end(mPageManager); ++it) {
size_t itemIndex = 0;
Item item;
while (true) {
auto err = it->findItem(nsIndex, ItemType::ANY, nullptr, itemIndex, item);
if (err == ESP_ERR_NVS_NOT_FOUND) {
break;
}
else if (err != ESP_OK) {
return err;
}
usedEntries += item.span;
itemIndex += item.span;
if (itemIndex >= it->ENTRY_COUNT) break;
}
}
return ESP_OK;
}
void Storage::fillEntryInfo(Item &item, nvs_entry_info_t &info)
{
info.type = static_cast<nvs_type_t>(item.datatype);
strncpy(info.key, item.key, sizeof(info.key) - 1);
info.key[sizeof(info.key) - 1] = '\0';
for (auto &name : mNamespaces) {
if(item.nsIndex == name.mIndex) {
strlcpy(info.namespace_name, name.mName, sizeof(info.namespace_name));
break;
}
}
}
bool Storage::findEntry(nvs_opaque_iterator_t* it, const char* namespace_name)
{
it->entryIndex = 0;
it->nsIndex = Page::NS_ANY;
it->page = mPageManager.begin();
if (namespace_name != nullptr) {
if(createOrOpenNamespace(namespace_name, false, it->nsIndex) != ESP_OK) {
return false;
}
}
return nextEntry(it);
}
bool Storage::findEntryNs(nvs_opaque_iterator_t* it, uint8_t nsIndex)
{
it->entryIndex = 0;
it->nsIndex = nsIndex;
it->page = mPageManager.begin();
return nextEntry(it);
}
inline bool isIterableItem(Item& item)
{
return (item.nsIndex != 0 &&
item.datatype != ItemType::BLOB &&
item.datatype != ItemType::BLOB_IDX);
}
inline bool isMultipageBlob(Item& item)
{
return (item.datatype == ItemType::BLOB_DATA &&
!(item.chunkIndex == static_cast<uint8_t>(VerOffset::VER_0_OFFSET)
|| item.chunkIndex == static_cast<uint8_t>(VerOffset::VER_1_OFFSET)));
}
bool Storage::nextEntry(nvs_opaque_iterator_t* it)
{
Item item;
esp_err_t err;
for (auto page = it->page; page != mPageManager.end(); ++page) {
do {
err = page->findItem(it->nsIndex, (ItemType)it->type, nullptr, it->entryIndex, item);
it->entryIndex += item.span;
if(err == ESP_OK && isIterableItem(item) && !isMultipageBlob(item)) {
fillEntryInfo(item, it->entry_info);
it->page = page;
return true;
}
} while (err != ESP_ERR_NVS_NOT_FOUND);
it->entryIndex = 0;
}
return false;
}
}
#if defined(SEGGER_H) && defined(GLOBAL_H)
NVS_GUARD_SYSVIEW_MACRO_EXPANSION_POP();
#endif
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