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/**
* @file FSCommon.cpp
* @brief This file contains functions for common filesystem operations such as copying, renaming, listing and deleting files and
* directories.
*
* The functions in this file are used to perform common filesystem operations such as copying, renaming, listing and deleting
* files and directories. These functions are used in the Meshtastic-device project to manage files and directories on the
* device's filesystem.
*
*/
#include "FSCommon.h"
#include "SPILock.h"
#include "configuration.h"
#if defined(ARCH_PORTDUINO)
#include <filesystem>
#endif
#if defined(ARCH_NRF52) || defined(ARCH_STM32)
// Adafruit_LittleFS (nRF52) and STM32_LittleFS both wrap littlefs v1, which predates lfs_fs_size().
// Count the blocks currently in use with lfs_traverse() instead.
static int fsCountBlockCb(void *ctx, lfs_block_t)
{
*static_cast<size_t *>(ctx) += 1;
return 0;
}
size_t fsTotalBytes()
{
lfs_t *fs = FSCom._getFS();
if (!fs || !fs->cfg)
return 0;
return (size_t)fs->cfg->block_count * (size_t)fs->cfg->block_size;
}
size_t fsUsedBytes()
{
lfs_t *fs = FSCom._getFS();
if (!fs || !fs->cfg)
return 0;
size_t blocks = 0;
FSCom._lockFS();
int err = lfs_traverse(fs, fsCountBlockCb, &blocks);
FSCom._unlockFS();
if (err < 0)
return fsTotalBytes(); // report "full" so capacity checks fail safe
return blocks * (size_t)fs->cfg->block_size;
}
#elif defined(ARCH_RP2040)
// arduino-pico reports capacity through FSInfo rather than as methods.
size_t fsTotalBytes()
{
FSInfo info;
return FSCom.info(info) ? (size_t)info.totalBytes : 0;
}
size_t fsUsedBytes()
{
FSInfo info;
return FSCom.info(info) ? (size_t)info.usedBytes : 0;
}
#elif defined(ARCH_PORTDUINO)
// Portduino is backed by the host filesystem; ask the OS about the volume holding the working
// directory. std::filesystem keeps this working on native-windows too, where statvfs() does not
// exist. On error we report "full" so capacity checks fail safe.
size_t fsTotalBytes()
{
std::error_code ec;
const auto info = std::filesystem::space(".", ec);
return ec ? 0 : (size_t)info.capacity;
}
size_t fsUsedBytes()
{
std::error_code ec;
const auto info = std::filesystem::space(".", ec);
if (ec || info.capacity < info.available)
return fsTotalBytes();
return (size_t)(info.capacity - info.available);
}
#else
// ESP32 LittleFS and the nRF54L15 wrapper expose these directly.
size_t fsTotalBytes()
{
return FSCom.totalBytes();
}
size_t fsUsedBytes()
{
return FSCom.usedBytes();
}
#endif
// Software SPI is used by MUI so disable SD card here until it's also implemented
#if defined(HAS_SDCARD) && !defined(SDCARD_USE_SOFT_SPI)
#include <SD.h>
#include <SPI.h>
#ifdef SDCARD_USE_SPI1
SPIClass SPI_HSPI(HSPI);
#define SDHandler SPI_HSPI
#else
#define SDHandler SPI
#endif
#ifndef SD_SPI_FREQUENCY
#define SD_SPI_FREQUENCY 4000000U
#endif
#endif // HAS_SDCARD
/**
* Renames a file from pathFrom to pathTo.
*
* @param pathFrom The original path of the file.
* @param pathTo The new path of the file.
*
* @return True if the file was successfully renamed, false otherwise.
*/
bool renameFile(const char *pathFrom, const char *pathTo)
{
#ifdef FSCom
spiLock->lock();
bool result = FSCom.rename(pathFrom, pathTo);
spiLock->unlock();
return result;
#else
return false;
#endif
}
#include <cstring>
#include <new>
#include <stdexcept>
#include <vector>
/**
* @brief Platform-agnostic filesystem format / wipe.
*
* On embedded targets (ESP32, NRF52, STM32WL, RP2040) this calls the
* native FSCom.format() which erases and reinitialises the LittleFS
* partition.
*
* On Portduino the fs::FS backend has no format() method. We instead
* delete /prefs (the only meshtastic data directory written at runtime)
* and return. rmDir("/prefs") is already called unconditionally by
* factoryReset() so this is a proven primitive on Portduino.
* FSBegin() is a no-op (#define FSBegin() true) on Portduino.
*
* @return true on success, false on failure or if no filesystem is configured.
*/
bool fsFormat()
{
#ifdef FSCom
#if defined(ARCH_PORTDUINO)
rmDir("/prefs");
return FSBegin();
#else
return FSCom.format();
#endif
#else
return false;
#endif
}
#ifdef FSCom
namespace
{
bool pathEndsWithDot(const char *path)
{
if (!path)
return false;
size_t length = strlen(path);
return length > 0 && path[length - 1] == '.';
}
bool copyFilePath(char *dest, size_t destSize, const char *path, bool *wasLimited)
{
if (!path || destSize == 0) {
if (wasLimited)
*wasLimited = true;
return false;
}
if (strlcpy(dest, path, destSize) >= destSize) {
if (wasLimited)
*wasLimited = true;
return false;
}
return true;
}
void collectFiles(const char *dirname, uint8_t levels, size_t maxCount, std::vector<meshtastic_FileInfo> &filenames,
bool *wasLimited)
{
if (!dirname)
return;
File root = FSCom.open(dirname, FILE_O_READ);
if (!root)
return;
if (!root.isDirectory()) {
root.close();
return;
}
File file = root.openNextFile();
// file.name()[0] check is a workaround for a bug in the Adafruit LittleFS nrf52 glue (see issue 4395)
while (file && file.name()[0]) {
if (filenames.size() >= maxCount) {
if (wasLimited)
*wasLimited = true;
file.close();
break;
}
const char *fileName = file.name();
if (file.isDirectory() && !pathEndsWithDot(fileName)) {
char pathBuffer[sizeof(((meshtastic_FileInfo *)nullptr)->file_name)] = {};
#ifdef ARCH_ESP32
const char *subDirPath = file.path();
#else
const char *subDirPath = fileName;
#endif
bool hasSubDirPath = copyFilePath(pathBuffer, sizeof(pathBuffer), subDirPath, wasLimited);
file.close();
if (levels && hasSubDirPath) {
collectFiles(pathBuffer, levels - 1, maxCount, filenames, wasLimited);
} else if (wasLimited) {
*wasLimited = true;
}
} else {
meshtastic_FileInfo fileInfo = {"", static_cast<uint32_t>(file.size())};
#ifdef ARCH_ESP32
bool hasFilePath = copyFilePath(fileInfo.file_name, sizeof(fileInfo.file_name), file.path(), wasLimited);
#else
bool hasFilePath = copyFilePath(fileInfo.file_name, sizeof(fileInfo.file_name), file.name(), wasLimited);
#endif
if (hasFilePath && !pathEndsWithDot(fileInfo.file_name)) {
filenames.push_back(fileInfo);
}
file.close();
}
file = root.openNextFile();
}
root.close();
}
} // namespace
#endif
/**
* @brief Get the list of files in a directory.
*
* This function returns a list of files in a directory. The list includes the full path of each file.
* We can't use SPILOCK here because of recursion. Callers of this function should use SPILOCK.
*
* @param dirname The name of the directory.
* @param levels The number of levels of subdirectories to list.
* @param maxCount The maximum number of files to collect before truncating the walk.
* @param wasLimited Optional out-param, set to true if the listing was truncated (by maxCount or low memory).
* @return A vector of meshtastic_FileInfo for each file in the directory.
*/
std::vector<meshtastic_FileInfo> getFiles(const char *dirname, uint8_t levels, size_t maxCount, bool *wasLimited)
{
std::vector<meshtastic_FileInfo> filenames = {};
if (wasLimited)
*wasLimited = false;
#ifdef FSCom
#if defined(__cpp_exceptions) || defined(__EXCEPTIONS)
size_t reservedCount = maxCount;
while (reservedCount > 0) {
try {
filenames.reserve(reservedCount);
break;
} catch (const std::bad_alloc &) {
reservedCount /= 2;
} catch (const std::length_error &) {
reservedCount /= 2;
}
}
if (reservedCount == 0) {
if (wasLimited)
*wasLimited = true;
return filenames;
}
if (reservedCount < maxCount) {
if (wasLimited)
*wasLimited = true;
maxCount = reservedCount;
}
#endif
collectFiles(dirname, levels, maxCount, filenames, wasLimited);
#endif
return filenames;
}
/**
* Lists the contents of a directory.
* We can't use SPILOCK here because of recursion. Callers of this function should use SPILOCK.
*
* @param dirname The name of the directory to list.
* @param levels The number of levels of subdirectories to list.
* @param del Whether or not to delete the contents of the directory after listing.
*/
void listDir(const char *dirname, uint8_t levels, bool del)
{
#ifdef FSCom
char buffer[255];
File root = FSCom.open(dirname, FILE_O_READ);
if (!root || !root.isDirectory())
return;
File file = root.openNextFile();
while (file && file.name()[0]) { // file.name()[0] check: workaround for Adafruit LittleFS nRF52 bug #4395
#ifdef ARCH_ESP32
const char *filepath = file.path();
#else
const char *filepath = file.name();
#endif
if (file.isDirectory() && !String(file.name()).endsWith(".")) {
if (levels) {
listDir(filepath, levels - 1, del);
if (del) {
LOG_DEBUG("Remove %s", filepath);
strncpy(buffer, filepath, sizeof(buffer) - 1);
buffer[sizeof(buffer) - 1] = '\0';
file.close();
FSCom.rmdir(buffer);
} else {
file.close();
}
}
} else {
if (del) {
LOG_DEBUG("Delete %s", filepath);
strncpy(buffer, filepath, sizeof(buffer) - 1);
buffer[sizeof(buffer) - 1] = '\0';
file.close();
FSCom.remove(buffer);
} else {
LOG_TRACE(" %s (%i Bytes)", filepath, file.size());
file.close();
}
}
file = root.openNextFile();
}
#ifdef ARCH_ESP32
const char *rootpath = root.path();
#else
const char *rootpath = root.name();
#endif
if (del) {
LOG_DEBUG("Remove %s", rootpath);
strncpy(buffer, rootpath, sizeof(buffer) - 1);
buffer[sizeof(buffer) - 1] = '\0';
root.close();
FSCom.rmdir(buffer);
} else {
root.close();
}
#endif
}
/**
* @brief Removes a directory and all its contents.
*
* This function recursively removes a directory and all its contents, including subdirectories and files.
*
* @param dirname The name of the directory to remove.
*/
void rmDir(const char *dirname)
{
#ifdef FSCom
listDir(dirname, 10, true);
#endif
}
/**
* Some platforms (nrf52) might need to do an extra step before FSBegin().
*/
__attribute__((weak, noinline)) void preFSBegin() {}
void fsInit()
{
#ifdef FSCom
concurrency::LockGuard g(spiLock);
preFSBegin();
if (!FSBegin()) {
LOG_ERROR("Filesystem mount failed");
// assert(0); This auto-formats the partition, so no need to fail here.
}
#if defined(ARCH_ESP32)
LOG_DEBUG("Filesystem files (%d/%d Bytes):", FSCom.usedBytes(), FSCom.totalBytes());
#else
LOG_TRACE("Filesystem files:");
#endif
listDir("/", 10);
#endif
}
/**
* Initializes the SD card and mounts the file system.
*/
void setupSDCard()
{
#if defined(HAS_SDCARD) && !defined(SDCARD_USE_SOFT_SPI) && !defined(HAS_SD_MMC)
concurrency::LockGuard g(spiLock);
SDHandler.begin(SPI_SCK, SPI_MISO, SPI_MOSI);
if (!SD.begin(SDCARD_CS, SDHandler, SD_SPI_FREQUENCY)) {
LOG_DEBUG("No SD_MMC card detected");
return;
}
uint8_t cardType = SD.cardType();
if (cardType == CARD_NONE) {
LOG_DEBUG("No SD_MMC card attached");
return;
}
LOG_DEBUG("SD_MMC Card Type: ");
if (cardType == CARD_MMC) {
LOG_DEBUG("MMC");
} else if (cardType == CARD_SD) {
LOG_DEBUG("SDSC");
} else if (cardType == CARD_SDHC) {
LOG_DEBUG("SDHC");
} else {
LOG_DEBUG("UNKNOWN");
}
uint64_t cardSize = SD.cardSize() / (1024 * 1024);
LOG_DEBUG("SD Card Size: %lu MB", (uint32_t)cardSize);
LOG_DEBUG("Total space: %lu MB", (uint32_t)(SD.totalBytes() / (1024 * 1024)));
LOG_DEBUG("Used space: %lu MB", (uint32_t)(SD.usedBytes() / (1024 * 1024)));
#endif
}