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OVMS3-idf/components/nvs_flash/src/nvs_api.cpp

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// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// 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 "nvs.hpp"
#include "nvs_flash.h"
#include "nvs_storage.hpp"
#include "intrusive_list.h"
#include "nvs_platform.hpp"
#include "esp_partition.h"
#include "sdkconfig.h"
#ifdef CONFIG_NVS_ENCRYPTION
#include "nvs_encr.hpp"
#endif
#ifdef ESP_PLATFORM
#include <rom/crc.h>
// Uncomment this line to force output from this module
// #define LOG_LOCAL_LEVEL ESP_LOG_DEBUG
#include "esp_log.h"
static const char* TAG = "nvs";
#else
#include "crc.h"
#define ESP_LOGD(...)
#endif
extern "C" void nvs_dump(const char *partName);
extern "C" esp_err_t nvs_flash_init_custom(const char *partName, uint32_t baseSector, uint32_t sectorCount);
#ifdef CONFIG_NVS_ENCRYPTION
extern "C" esp_err_t nvs_flash_secure_init_custom(const char *partName, uint32_t baseSector, uint32_t sectorCount, nvs_sec_cfg_t* cfg);
#endif
class HandleEntry : public intrusive_list_node<HandleEntry>
{
static uint32_t s_nvs_next_handle;
public:
HandleEntry() {}
HandleEntry(bool readOnly, uint8_t nsIndex, nvs::Storage* StoragePtr) :
mHandle(++s_nvs_next_handle), // Begin the handle value with 1
mReadOnly(readOnly),
mNsIndex(nsIndex),
mStoragePtr(StoragePtr)
{
}
nvs_handle mHandle;
uint8_t mReadOnly;
uint8_t mNsIndex;
nvs::Storage* mStoragePtr;
};
#ifdef ESP_PLATFORM
SemaphoreHandle_t nvs::Lock::mSemaphore = NULL;
#endif
using namespace std;
using namespace nvs;
static intrusive_list<HandleEntry> s_nvs_handles;
uint32_t HandleEntry::s_nvs_next_handle;
static intrusive_list<nvs::Storage> s_nvs_storage_list;
static nvs::Storage* lookup_storage_from_name(const char *name)
{
auto it = find_if(begin(s_nvs_storage_list), end(s_nvs_storage_list), [=](Storage& e) -> bool {
return (strcmp(e.getPartName(), name) == 0);
});
if (it == end(s_nvs_storage_list)) {
return NULL;
}
return it;
}
extern "C" void nvs_dump(const char *partName)
{
Lock lock;
nvs::Storage* pStorage;
pStorage = lookup_storage_from_name(partName);
if (pStorage == NULL) {
return;
}
pStorage->debugDump();
return;
}
extern "C" esp_err_t nvs_flash_init_custom(const char *partName, uint32_t baseSector, uint32_t sectorCount)
{
ESP_LOGD(TAG, "nvs_flash_init_custom partition=%s start=%d count=%d", partName, baseSector, sectorCount);
nvs::Storage* new_storage = NULL;
nvs::Storage* storage = lookup_storage_from_name(partName);
if (storage == NULL) {
new_storage = new (std::nothrow) nvs::Storage((const char *)partName);
if (!new_storage) return ESP_ERR_NO_MEM;
storage = new_storage;
}
esp_err_t err = storage->init(baseSector, sectorCount);
if (new_storage != NULL) {
if (err == ESP_OK) {
s_nvs_storage_list.push_back(new_storage);
} else {
delete new_storage;
}
}
return err;
}
#ifdef CONFIG_NVS_ENCRYPTION
extern "C" esp_err_t nvs_flash_secure_init_custom(const char *partName, uint32_t baseSector, uint32_t sectorCount, nvs_sec_cfg_t* cfg)
{
ESP_LOGD(TAG, "nvs_flash_secure_init_custom partition=%s start=%d count=%d", partName, baseSector, sectorCount);
if(cfg) {
auto encrMgr = EncrMgr::getInstance();
if (!encrMgr) return ESP_ERR_NO_MEM;
auto err = encrMgr->setSecurityContext(baseSector, sectorCount, cfg);
if(err != ESP_OK) {
return err;
}
}
return nvs_flash_init_custom(partName, baseSector, sectorCount);
}
#endif
#ifdef ESP_PLATFORM
extern "C" esp_err_t nvs_flash_init_partition(const char *part_name)
{
Lock::init();
Lock lock;
nvs::Storage* mStorage;
mStorage = lookup_storage_from_name(part_name);
if (mStorage) {
return ESP_OK;
}
const esp_partition_t* partition = esp_partition_find_first(
ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_DATA_NVS, part_name);
if (partition == NULL) {
return ESP_ERR_NOT_FOUND;
}
return nvs_flash_init_custom(part_name, partition->address / SPI_FLASH_SEC_SIZE,
partition->size / SPI_FLASH_SEC_SIZE);
}
extern "C" esp_err_t nvs_flash_init(void)
{
return nvs_flash_init_partition(NVS_DEFAULT_PART_NAME);
}
#ifdef CONFIG_NVS_ENCRYPTION
extern "C" esp_err_t nvs_flash_secure_init_partition(const char *part_name, nvs_sec_cfg_t* cfg)
{
Lock::init();
Lock lock;
nvs::Storage* mStorage;
mStorage = lookup_storage_from_name(part_name);
if (mStorage) {
return ESP_OK;
}
const esp_partition_t* partition = esp_partition_find_first(
ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_DATA_NVS, part_name);
if (partition == NULL) {
return ESP_ERR_NOT_FOUND;
}
return nvs_flash_secure_init_custom(part_name, partition->address / SPI_FLASH_SEC_SIZE,
partition->size / SPI_FLASH_SEC_SIZE, cfg);
}
extern "C" esp_err_t nvs_flash_secure_init(nvs_sec_cfg_t* cfg)
{
return nvs_flash_secure_init_partition(NVS_DEFAULT_PART_NAME, cfg);
}
#endif
extern "C" esp_err_t nvs_flash_erase_partition(const char *part_name)
{
const esp_partition_t* partition = esp_partition_find_first(
ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_DATA_NVS, part_name);
if (partition == NULL) {
return ESP_ERR_NOT_FOUND;
}
return esp_partition_erase_range(partition, 0, partition->size);
}
extern "C" esp_err_t nvs_flash_erase()
{
return nvs_flash_erase_partition(NVS_DEFAULT_PART_NAME);
}
#endif // ESP_PLATFORM
extern "C" esp_err_t nvs_flash_deinit_partition(const char* partition_name)
{
Lock::init();
Lock lock;
nvs::Storage* storage = lookup_storage_from_name(partition_name);
if (!storage) {
return ESP_ERR_NVS_NOT_INITIALIZED;
}
#ifdef CONFIG_NVS_ENCRYPTION
if(EncrMgr::isEncrActive()) {
auto encrMgr = EncrMgr::getInstance();
encrMgr->removeSecurityContext(storage->getBaseSector());
}
#endif
/* Clean up handles related to the storage being deinitialized */
auto it = s_nvs_handles.begin();
auto next = it;
while(it != s_nvs_handles.end()) {
next++;
if (it->mStoragePtr == storage) {
ESP_LOGD(TAG, "Deleting handle %d (ns=%d) related to partition \"%s\" (missing call to nvs_close?)",
it->mHandle, it->mNsIndex, partition_name);
s_nvs_handles.erase(it);
delete static_cast<HandleEntry*>(it);
}
it = next;
}
/* Finally delete the storage itself */
s_nvs_storage_list.erase(storage);
delete storage;
return ESP_OK;
}
extern "C" esp_err_t nvs_flash_deinit(void)
{
return nvs_flash_deinit_partition(NVS_DEFAULT_PART_NAME);
}
static esp_err_t nvs_find_ns_handle(nvs_handle handle, HandleEntry& entry)
{
auto it = find_if(begin(s_nvs_handles), end(s_nvs_handles), [=](HandleEntry& e) -> bool {
return e.mHandle == handle;
});
if (it == end(s_nvs_handles)) {
return ESP_ERR_NVS_INVALID_HANDLE;
}
entry = *it;
return ESP_OK;
}
extern "C" esp_err_t nvs_open_from_partition(const char *part_name, const char* name, nvs_open_mode open_mode, nvs_handle *out_handle)
{
Lock lock;
ESP_LOGD(TAG, "%s %s %d", __func__, name, open_mode);
uint8_t nsIndex;
nvs::Storage* sHandle;
sHandle = lookup_storage_from_name(part_name);
if (sHandle == NULL) {
return ESP_ERR_NVS_PART_NOT_FOUND;
}
esp_err_t err = sHandle->createOrOpenNamespace(name, open_mode == NVS_READWRITE, nsIndex);
if (err != ESP_OK) {
return err;
}
HandleEntry *handle_entry = new (std::nothrow) HandleEntry(open_mode==NVS_READONLY, nsIndex, sHandle);
if (!handle_entry) return ESP_ERR_NO_MEM;
s_nvs_handles.push_back(handle_entry);
*out_handle = handle_entry->mHandle;
return ESP_OK;
}
extern "C" esp_err_t nvs_open(const char* name, nvs_open_mode open_mode, nvs_handle *out_handle)
{
if (s_nvs_storage_list.size() == 0) {
return ESP_ERR_NVS_NOT_INITIALIZED;
}
return nvs_open_from_partition(NVS_DEFAULT_PART_NAME, name, open_mode, out_handle);
}
extern "C" void nvs_close(nvs_handle handle)
{
Lock lock;
ESP_LOGD(TAG, "%s %d", __func__, handle);
auto it = find_if(begin(s_nvs_handles), end(s_nvs_handles), [=](HandleEntry& e) -> bool {
return e.mHandle == handle;
});
if (it == end(s_nvs_handles)) {
return;
}
s_nvs_handles.erase(it);
delete static_cast<HandleEntry*>(it);
}
extern "C" esp_err_t nvs_erase_key(nvs_handle handle, const char* key)
{
Lock lock;
ESP_LOGD(TAG, "%s %s\r\n", __func__, key);
HandleEntry entry;
auto err = nvs_find_ns_handle(handle, entry);
if (err != ESP_OK) {
return err;
}
if (entry.mReadOnly) {
return ESP_ERR_NVS_READ_ONLY;
}
return entry.mStoragePtr->eraseItem(entry.mNsIndex, key);
}
extern "C" esp_err_t nvs_erase_all(nvs_handle handle)
{
Lock lock;
ESP_LOGD(TAG, "%s\r\n", __func__);
HandleEntry entry;
auto err = nvs_find_ns_handle(handle, entry);
if (err != ESP_OK) {
return err;
}
if (entry.mReadOnly) {
return ESP_ERR_NVS_READ_ONLY;
}
return entry.mStoragePtr->eraseNamespace(entry.mNsIndex);
}
template<typename T>
static esp_err_t nvs_set(nvs_handle handle, const char* key, T value)
{
Lock lock;
ESP_LOGD(TAG, "%s %s %d %d", __func__, key, sizeof(T), (uint32_t) value);
HandleEntry entry;
auto err = nvs_find_ns_handle(handle, entry);
if (err != ESP_OK) {
return err;
}
if (entry.mReadOnly) {
return ESP_ERR_NVS_READ_ONLY;
}
return entry.mStoragePtr->writeItem(entry.mNsIndex, key, value);
}
extern "C" esp_err_t nvs_set_i8 (nvs_handle handle, const char* key, int8_t value)
{
return nvs_set(handle, key, value);
}
extern "C" esp_err_t nvs_set_u8 (nvs_handle handle, const char* key, uint8_t value)
{
return nvs_set(handle, key, value);
}
extern "C" esp_err_t nvs_set_i16 (nvs_handle handle, const char* key, int16_t value)
{
return nvs_set(handle, key, value);
}
extern "C" esp_err_t nvs_set_u16 (nvs_handle handle, const char* key, uint16_t value)
{
return nvs_set(handle, key, value);
}
extern "C" esp_err_t nvs_set_i32 (nvs_handle handle, const char* key, int32_t value)
{
return nvs_set(handle, key, value);
}
extern "C" esp_err_t nvs_set_u32 (nvs_handle handle, const char* key, uint32_t value)
{
return nvs_set(handle, key, value);
}
extern "C" esp_err_t nvs_set_i64 (nvs_handle handle, const char* key, int64_t value)
{
return nvs_set(handle, key, value);
}
extern "C" esp_err_t nvs_set_u64 (nvs_handle handle, const char* key, uint64_t value)
{
return nvs_set(handle, key, value);
}
extern "C" esp_err_t nvs_commit(nvs_handle handle)
{
Lock lock;
// no-op for now, to be used when intermediate cache is added
HandleEntry entry;
return nvs_find_ns_handle(handle, entry);
}
extern "C" esp_err_t nvs_set_str(nvs_handle handle, const char* key, const char* value)
{
Lock lock;
ESP_LOGD(TAG, "%s %s %s", __func__, key, value);
HandleEntry entry;
auto err = nvs_find_ns_handle(handle, entry);
if (err != ESP_OK) {
return err;
}
return entry.mStoragePtr->writeItem(entry.mNsIndex, nvs::ItemType::SZ, key, value, strlen(value) + 1);
}
extern "C" esp_err_t nvs_set_blob(nvs_handle handle, const char* key, const void* value, size_t length)
{
Lock lock;
ESP_LOGD(TAG, "%s %s %d", __func__, key, length);
HandleEntry entry;
auto err = nvs_find_ns_handle(handle, entry);
if (err != ESP_OK) {
return err;
}
return entry.mStoragePtr->writeItem(entry.mNsIndex, nvs::ItemType::BLOB, key, value, length);
}
template<typename T>
static esp_err_t nvs_get(nvs_handle handle, const char* key, T* out_value)
{
Lock lock;
ESP_LOGD(TAG, "%s %s %d", __func__, key, sizeof(T));
HandleEntry entry;
auto err = nvs_find_ns_handle(handle, entry);
if (err != ESP_OK) {
return err;
}
return entry.mStoragePtr->readItem(entry.mNsIndex, key, *out_value);
}
extern "C" esp_err_t nvs_get_i8 (nvs_handle handle, const char* key, int8_t* out_value)
{
return nvs_get(handle, key, out_value);
}
extern "C" esp_err_t nvs_get_u8 (nvs_handle handle, const char* key, uint8_t* out_value)
{
return nvs_get(handle, key, out_value);
}
extern "C" esp_err_t nvs_get_i16 (nvs_handle handle, const char* key, int16_t* out_value)
{
return nvs_get(handle, key, out_value);
}
extern "C" esp_err_t nvs_get_u16 (nvs_handle handle, const char* key, uint16_t* out_value)
{
return nvs_get(handle, key, out_value);
}
extern "C" esp_err_t nvs_get_i32 (nvs_handle handle, const char* key, int32_t* out_value)
{
return nvs_get(handle, key, out_value);
}
extern "C" esp_err_t nvs_get_u32 (nvs_handle handle, const char* key, uint32_t* out_value)
{
return nvs_get(handle, key, out_value);
}
extern "C" esp_err_t nvs_get_i64 (nvs_handle handle, const char* key, int64_t* out_value)
{
return nvs_get(handle, key, out_value);
}
extern "C" esp_err_t nvs_get_u64 (nvs_handle handle, const char* key, uint64_t* out_value)
{
return nvs_get(handle, key, out_value);
}
static esp_err_t nvs_get_str_or_blob(nvs_handle handle, nvs::ItemType type, const char* key, void* out_value, size_t* length)
{
Lock lock;
ESP_LOGD(TAG, "%s %s", __func__, key);
HandleEntry entry;
auto err = nvs_find_ns_handle(handle, entry);
if (err != ESP_OK) {
return err;
}
size_t dataSize;
err = entry.mStoragePtr->getItemDataSize(entry.mNsIndex, type, key, dataSize);
if (err != ESP_OK) {
return err;
}
if (length == nullptr) {
return ESP_ERR_NVS_INVALID_LENGTH;
} else if (out_value == nullptr) {
*length = dataSize;
return ESP_OK;
} else if (*length < dataSize) {
*length = dataSize;
return ESP_ERR_NVS_INVALID_LENGTH;
}
*length = dataSize;
return entry.mStoragePtr->readItem(entry.mNsIndex, type, key, out_value, dataSize);
}
extern "C" esp_err_t nvs_get_str(nvs_handle handle, const char* key, char* out_value, size_t* length)
{
return nvs_get_str_or_blob(handle, nvs::ItemType::SZ, key, out_value, length);
}
extern "C" esp_err_t nvs_get_blob(nvs_handle handle, const char* key, void* out_value, size_t* length)
{
return nvs_get_str_or_blob(handle, nvs::ItemType::BLOB, key, out_value, length);
}
extern "C" esp_err_t nvs_get_stats(const char* part_name, nvs_stats_t* nvs_stats)
{
Lock lock;
nvs::Storage* pStorage;
if (nvs_stats == NULL) {
return ESP_ERR_INVALID_ARG;
}
nvs_stats->used_entries = 0;
nvs_stats->free_entries = 0;
nvs_stats->total_entries = 0;
nvs_stats->namespace_count = 0;
pStorage = lookup_storage_from_name((part_name == NULL) ? NVS_DEFAULT_PART_NAME : part_name);
if (pStorage == NULL) {
return ESP_ERR_NVS_NOT_INITIALIZED;
}
if(!pStorage->isValid()){
return ESP_ERR_NVS_INVALID_STATE;
}
return pStorage->fillStats(*nvs_stats);
}
extern "C" esp_err_t nvs_get_used_entry_count(nvs_handle handle, size_t* used_entries)
{
Lock lock;
if(used_entries == NULL){
return ESP_ERR_INVALID_ARG;
}
*used_entries = 0;
HandleEntry entry;
auto err = nvs_find_ns_handle(handle, entry);
if (err != ESP_OK) {
return err;
}
size_t used_entry_count;
err = entry.mStoragePtr->calcEntriesInNamespace(entry.mNsIndex, used_entry_count);
if(err == ESP_OK){
*used_entries = used_entry_count;
}
return err;
}
#if (defined CONFIG_NVS_ENCRYPTION) && (defined ESP_PLATFORM)
extern "C" esp_err_t nvs_flash_generate_keys(const esp_partition_t* partition, nvs_sec_cfg_t* cfg)
{
auto err = esp_partition_erase_range(partition, 0, partition->size);
if(err != ESP_OK) {
return err;
}
for(uint8_t cnt = 0; cnt < NVS_KEY_SIZE; cnt++) {
cfg->eky[cnt] = 0xff;
cfg->tky[cnt] = 0xee;
}
err = spi_flash_write(partition->address, cfg->eky, NVS_KEY_SIZE);
if(err != ESP_OK) {
return err;
}
err = spi_flash_write(partition->address + NVS_KEY_SIZE, cfg->tky, NVS_KEY_SIZE);
if(err != ESP_OK) {
return err;
}
err = esp_partition_read(partition, 0, cfg->eky, NVS_KEY_SIZE);
if(err != ESP_OK) {
return err;
}
err = esp_partition_read(partition, NVS_KEY_SIZE, cfg->tky, NVS_KEY_SIZE);
if(err != ESP_OK) {
return err;
}
uint32_t crc_calc = crc32_le(0xffffffff, cfg->eky, NVS_KEY_SIZE);
crc_calc = crc32_le(crc_calc, cfg->tky, NVS_KEY_SIZE);
uint8_t crc_wr[16];
memset(crc_wr, 0xff, sizeof(crc_wr));
memcpy(crc_wr, &crc_calc, 4);
err = esp_partition_write(partition, 2 * NVS_KEY_SIZE, crc_wr, sizeof(crc_wr));
if(err != ESP_OK) {
return err;
}
return ESP_OK;
}
extern "C" esp_err_t nvs_flash_read_security_cfg(const esp_partition_t* partition, nvs_sec_cfg_t* cfg)
{
uint8_t eky_raw[NVS_KEY_SIZE], tky_raw[NVS_KEY_SIZE];
uint32_t crc_raw, crc_read, crc_calc;
auto check_if_initialized = [](uint8_t* eky, uint8_t* tky, uint32_t crc) {
uint8_t cnt = 0;
while(cnt < NVS_KEY_SIZE && eky[cnt] == 0xff && tky[cnt] == 0xff) cnt++;
if(cnt == NVS_KEY_SIZE && crc == 0xffffffff) {
return false;
}
return true;
};
auto err = spi_flash_read(partition->address, eky_raw, NVS_KEY_SIZE);
if(err != ESP_OK) {
return err;
}
err = spi_flash_read(partition->address + NVS_KEY_SIZE, tky_raw, NVS_KEY_SIZE);
if(err != ESP_OK) {
return err;
}
err = spi_flash_read(partition->address + 2 * NVS_KEY_SIZE, &crc_raw, 4);
if(err != ESP_OK) {
return err;
}
if(!check_if_initialized(eky_raw, tky_raw, crc_raw)) {
/* This is an uninitialized key partition*/
return ESP_ERR_NVS_KEYS_NOT_INITIALIZED;
}
err = esp_partition_read(partition, 0, cfg->eky, NVS_KEY_SIZE);
if(err != ESP_OK) {
return err;
}
err = esp_partition_read(partition, NVS_KEY_SIZE, cfg->tky, NVS_KEY_SIZE);
if(err != ESP_OK) {
return err;
}
err = esp_partition_read(partition, 2 * NVS_KEY_SIZE, &crc_read, 4);
if(err != ESP_OK) {
return err;
}
crc_calc = crc32_le(0xffffffff, cfg->eky, NVS_KEY_SIZE);
crc_calc = crc32_le(crc_calc, cfg->tky, NVS_KEY_SIZE);
if(crc_calc != crc_read) {
if(!check_if_initialized(cfg->eky, cfg->tky, crc_read)) {
/* This is an uninitialized key partition*/
return ESP_ERR_NVS_KEYS_NOT_INITIALIZED;
}
return ESP_ERR_NVS_CORRUPT_KEY_PART;
}
return ESP_OK;
}
#endif
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