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proxmark3/armsrc/spiffs.c
nvx 8dd963d305 make style
2023-08-24 16:34:33 +10:00

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//-----------------------------------------------------------------------------
// Borrowed initially from https://github.com/pellepl/spiffs
// Copyright (c) 2013-2017 Peter Andersson (pelleplutt1976 at gmail.com)
// Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// See LICENSE.txt for the text of the license.
//-----------------------------------------------------------------------------
// SPIFFS api for RDV40 Integration
//-----------------------------------------------------------------------------
#define SPIFFS_CFG_PHYS_SZ (1024 * 192)
#define SPIFFS_CFG_PHYS_ERASE_SZ (4 * 1024)
#define SPIFFS_CFG_PHYS_ADDR (0)
#define SPIFFS_CFG_LOG_PAGE_SZ (256)
#define SPIFFS_CFG_LOG_BLOCK_SZ (4 * 1024)
#define LOG_PAGE_SIZE 256
#define RDV40_SPIFFS_WORKBUF_SZ (LOG_PAGE_SIZE * 2)
// Experimental : 4 full pages(LOG_PAGE_SIZE + file descript size) of cache for
// Reading and writing if reading cache is stable, writing cache may need more
// testing regarding power loss, page consistency checks, Garbage collector
// Flushing handling... in doubt, use maximal safetylevel as, in most of the
// case, will ensure a flush by rollbacking to previous Unmounted state
#define RDV40_SPIFFS_CACHE_SZ ((LOG_PAGE_SIZE + 32) * 4)
#define SPIFFS_FD_SIZE (32)
#define RDV40_SPIFFS_MAX_FD (3)
#define RDV40_SPIFFS_FDBUF_SZ (SPIFFS_FD_SIZE * RDV40_SPIFFS_MAX_FD)
#define RDV40_LLERASE_BLOCKSIZE (64*1024)
#define RDV40_SPIFFS_LAZY_HEADER \
int changed = 0; \
if ((level == RDV40_SPIFFS_SAFETY_LAZY) || (level == RDV40_SPIFFS_SAFETY_SAFE)) { \
changed = rdv40_spiffs_lazy_mount(); \
}
#define RDV40_SPIFFS_SAFE_FOOTER \
if (level == RDV40_SPIFFS_SAFETY_SAFE) { \
changed = rdv40_spiffs_lazy_mount_rollback(changed); \
} \
return changed;
#define RDV40_SPIFFS_SAFE_FUNCTION(RDV40_SPIFFS_LLFUNCT) \
RDV40_SPIFFS_LAZY_HEADER \
RDV40_SPIFFS_LLFUNCT \
RDV40_SPIFFS_SAFE_FOOTER
#include "spiffs.h"
#include "BigBuf.h"
#include "dbprint.h"
///// FLASH LEVEL R/W/E operations for feeding SPIFFS Driver/////////////////
static s32_t rdv40_spiffs_llread(u32_t addr, u32_t size, u8_t *dst) {
if (!Flash_ReadData(addr, dst, size)) {
return 128;
}
return SPIFFS_OK;
}
static s32_t rdv40_spiffs_llwrite(u32_t addr, u32_t size, u8_t *src) {
if (FlashInit() == false) {
return 129;
}
Flash_Write(addr, src, size);
return SPIFFS_OK;
}
static s32_t rdv40_spiffs_llerase(u32_t addr, u32_t size) {
if (FlashInit() == false) {
return 130;
}
if (g_dbglevel >= DBG_DEBUG) Dbprintf("LLERASEDBG : Orig addr : %d\n", addr);
uint8_t block, sector = 0;
block = addr / RDV40_LLERASE_BLOCKSIZE;
if (block) {
addr = addr - (block * RDV40_LLERASE_BLOCKSIZE);
}
if (g_dbglevel >= DBG_DEBUG) Dbprintf("LLERASEDBG : Result addr : %d\n", addr);
sector = addr / SPIFFS_CFG_LOG_BLOCK_SZ;
Flash_CheckBusy(BUSY_TIMEOUT);
Flash_WriteEnable();
if (g_dbglevel >= DBG_DEBUG) Dbprintf("LLERASEDBG : block : %d, sector : %d \n", block, sector);
uint8_t erased = Flash_Erase4k(block, sector);
Flash_CheckBusy(BUSY_TIMEOUT);
FlashStop();
// iceman: SPIFFS_OK expands to 0, erased is bool from Flash_Erase4k, which returns TRUE if ok.
// so this return logic looks wrong.
return (SPIFFS_OK == erased);
}
////////////////////////////////////////////////////////////////////////////////
////// SPIFFS LOW LEVEL OPERATIONS /////////////////////////////////////////////
static u8_t spiffs_work_buf[RDV40_SPIFFS_WORKBUF_SZ] __attribute__((aligned));
static u8_t spiffs_fds[RDV40_SPIFFS_FDBUF_SZ] __attribute__((aligned));
static u8_t spiffs_cache_buf[RDV40_SPIFFS_CACHE_SZ] __attribute__((aligned));
static spiffs fs;
static enum spiffs_mount_status {
RDV40_SPIFFS_UNMOUNTED,
RDV40_SPIFFS_MOUNTED,
RDV40_SPIFFS_UNKNOWN
} RDV40_SPIFFS_MOUNT_STATUS;
static int rdv40_spiffs_mounted(void) {
int ret = 0;
switch (RDV40_SPIFFS_MOUNT_STATUS) {
case RDV40_SPIFFS_MOUNTED:
ret = 1;
break;
case RDV40_SPIFFS_UNMOUNTED:
case RDV40_SPIFFS_UNKNOWN:
default:
ret = 0;
}
return ret;
}
int rdv40_spiffs_mount(void) {
if (rdv40_spiffs_mounted()) {
Dbprintf("ERR: SPIFFS already mounted !");
return SPIFFS_ERR_MOUNTED;
}
spiffs_config cfg;
cfg.hal_read_f = rdv40_spiffs_llread;
cfg.hal_write_f = rdv40_spiffs_llwrite;
cfg.hal_erase_f = rdv40_spiffs_llerase;
// uncached version
// int ret = SPIFFS_mount(&fs, &cfg, spiffs_work_buf, spiffs_fds,
// sizeof(spiffs_fds), 0, 0, 0); cached version, experimental
int ret = SPIFFS_mount(
&fs,
&cfg,
spiffs_work_buf,
spiffs_fds,
sizeof(spiffs_fds),
spiffs_cache_buf,
sizeof(spiffs_cache_buf),
0
);
if (ret == SPIFFS_OK) {
RDV40_SPIFFS_MOUNT_STATUS = RDV40_SPIFFS_MOUNTED;
}
return ret;
}
int rdv40_spiffs_unmount(void) {
if (!rdv40_spiffs_mounted()) {
Dbprintf("ERR: SPIFFS not mounted !");
return SPIFFS_ERR_NOT_MOUNTED;
}
SPIFFS_clearerr(&fs);
SPIFFS_unmount(&fs);
int ret = SPIFFS_errno(&fs);
if (ret == SPIFFS_OK) {
RDV40_SPIFFS_MOUNT_STATUS = RDV40_SPIFFS_UNMOUNTED;
}
return ret;
}
int rdv40_spiffs_check(void) {
rdv40_spiffs_lazy_mount();
SPIFFS_check(&fs);
SPIFFS_gc_quick(&fs, 0);
rdv40_spiffs_lazy_unmount();
rdv40_spiffs_lazy_mount();
return SPIFFS_gc(&fs, 8192) == SPIFFS_OK;
}
////////////////////////////////////////////////////////////////////////////////
///// Base RDV40_SPIFFS_SAFETY_NORMAL operations////////////////////////////////
void write_to_spiffs(const char *filename, const uint8_t *src, uint32_t size) {
spiffs_file fd = SPIFFS_open(&fs, filename, SPIFFS_CREAT | SPIFFS_TRUNC | SPIFFS_RDWR, 0);
// Note: SPIFFS_write() doesn't declare third parameter as const (but should)
if (SPIFFS_write(&fs, fd, (void *)src, size) < 0) {
Dbprintf("wr errno %i\n", SPIFFS_errno(&fs));
}
SPIFFS_close(&fs, fd);
}
void append_to_spiffs(const char *filename, const uint8_t *src, uint32_t size) {
spiffs_file fd = SPIFFS_open(&fs, filename, SPIFFS_APPEND | SPIFFS_RDWR, 0);
// Note: SPIFFS_write() doesn't declare third parameter as const (but should)
if (SPIFFS_write(&fs, fd, (void *)src, size) < 0) {
Dbprintf("errno %i\n", SPIFFS_errno(&fs));
}
SPIFFS_close(&fs, fd);
}
void read_from_spiffs(const char *filename, uint8_t *dst, uint32_t size) {
spiffs_file fd = SPIFFS_open(&fs, filename, SPIFFS_RDWR, 0);
if (SPIFFS_read(&fs, fd, dst, size) < 0) {
Dbprintf("errno %i\n", SPIFFS_errno(&fs));
}
SPIFFS_close(&fs, fd);
}
static void rename_in_spiffs(const char *old_filename, const char *new_filename) {
if (SPIFFS_rename(&fs, old_filename, new_filename) < 0) {
Dbprintf("errno %i\n", SPIFFS_errno(&fs));
}
}
static void remove_from_spiffs(const char *filename) {
if (SPIFFS_remove(&fs, filename) < 0) {
Dbprintf("errno %i\n", SPIFFS_errno(&fs));
}
}
uint32_t size_in_spiffs(const char *filename) {
spiffs_stat s;
if (SPIFFS_stat(&fs, filename, &s) < 0) {
Dbprintf("errno %i\n", SPIFFS_errno(&fs));
return 0;
}
return s.size;
}
static rdv40_spiffs_fsinfo info_of_spiffs(void) {
rdv40_spiffs_fsinfo fsinfo;
fsinfo.blockSize = SPIFFS_CFG_LOG_BLOCK_SZ;
fsinfo.pageSize = LOG_PAGE_SIZE;
fsinfo.maxOpenFiles = RDV40_SPIFFS_MAX_FD;
fsinfo.maxPathLength = SPIFFS_OBJ_NAME_LEN;
if (SPIFFS_info(&fs, &fsinfo.totalBytes, &fsinfo.usedBytes) < 0) {
Dbprintf("errno %i\n", SPIFFS_errno(&fs));
}
fsinfo.freeBytes = fsinfo.totalBytes - fsinfo.usedBytes;
// Rounding without float may be improved
fsinfo.usedPercent = ((100 * fsinfo.usedBytes) + (fsinfo.totalBytes / 2)) / fsinfo.totalBytes;
fsinfo.freePercent = (100 - fsinfo.usedPercent);
return fsinfo;
}
int exists_in_spiffs(const char *filename) {
spiffs_stat stat;
int rc = SPIFFS_stat(&fs, filename, &stat);
return (rc == SPIFFS_OK);
}
static RDV40SpiFFSFileType filetype_in_spiffs(const char *filename) {
RDV40SpiFFSFileType filetype = RDV40_SPIFFS_FILETYPE_UNKNOWN;
char symlinked[SPIFFS_OBJ_NAME_LEN];
sprintf(symlinked, "%s.lnk", filename);
if (exists_in_spiffs(filename)) {
filetype = RDV40_SPIFFS_FILETYPE_REAL;
}
if (exists_in_spiffs(symlinked)) {
if (filetype != RDV40_SPIFFS_FILETYPE_UNKNOWN) {
filetype = RDV40_SPIFFS_FILETYPE_BOTH;
} else {
filetype = RDV40_SPIFFS_FILETYPE_SYMLINK;
}
}
if (g_dbglevel >= DBG_DEBUG) {
switch (filetype) {
case RDV40_SPIFFS_FILETYPE_REAL:
Dbprintf("Filetype is " _YELLOW_("RDV40_SPIFFS_FILETYPE_REAL"));
break;
case RDV40_SPIFFS_FILETYPE_SYMLINK:
Dbprintf("Filetype is " _YELLOW_("RDV40_SPIFFS_FILETYPE_SYMLINK"));
break;
case RDV40_SPIFFS_FILETYPE_BOTH:
Dbprintf("Filetype is " _YELLOW_("RDV40_SPIFFS_FILETYPE_BOTH"));
break;
case RDV40_SPIFFS_FILETYPE_UNKNOWN:
Dbprintf("Filetype is " _YELLOW_("RDV40_SPIFFS_FILETYPE_UNKNOWN"));
break;
}
}
return filetype;
}
/*
static int is_valid_filename(const char *filename) {
if (filename == NULL) {
return false;
}
uint32_t len = strlen(filename);
return len > 0 && len < SPIFFS_OBJ_NAME_LEN;
}
*/
static void copy_in_spiffs(const char *src, const char *dst) {
uint32_t size = size_in_spiffs(src);
uint8_t *mem = BigBuf_malloc(size);
read_from_spiffs(src, (uint8_t *)mem, size);
write_to_spiffs(dst, (uint8_t *)mem, size);
}
////////////////////////////////////////////////////////////////////////////////
////// Abstract Operations for base Safetyness /////////////////////////////////
//
// mount if not already
// As an "hint" to the behavior one should adopt after his or her laziness
// it will return 0 if the call was a noop, either because it did not need to
// change OR because it wasn't ABLE to change :)
// 1 if the mount status actually changed
// so you know what to do IN CASE you wished to set things "back to previous
// state"
int rdv40_spiffs_lazy_mount(void) {
int changed = 0;
if (!rdv40_spiffs_mounted()) {
changed = rdv40_spiffs_mount();
/* if changed = 0 = SPIFFS_OK then all went well then the change
* actually occurred :)*/
changed = !changed;
}
return changed;
}
// unmount if not already
int rdv40_spiffs_lazy_unmount(void) {
int changed = 0;
if (rdv40_spiffs_mounted()) {
changed = rdv40_spiffs_unmount();
changed = !changed;
}
return changed;
}
// Before further Reading, it is required to have in mind that UNMOUTING is
// important in some ways Because it is the ONLY operation which ensure that
// -> all Caches and writings are flushed to the FS
// -> all FD are properly closed
// -> Every best effort has been done to ensure consistency and integrity of the
// state reputated to be the actual state of the Filesystem.
//---
// This will "toggle" mount status
// on "changement" conditional
// so it is for the former lazy_ mounting function to actually rollback or not
// depending on the result of the previous This is super lazy implementation as
// it is either a toggle to previous state or again a noop as everything was a
// nonevent If you have a function which NEEDS mounting but you want to exit
// this function in the very state mounting was before your intervention all
// things can now be transparent like
/*
void my_lazy_spiffs_act(){
uint8_t changed = rdv40_spiffs_lazy_mount();
[..] Do what you have to do with spiffs
rdv40_spiffs_lazy_rollback(changed)
}
*/
// The exact same goes for needed unmouting with eventual rollback, you just
// have to use lazy_unmount insted of lazy mount This way, you can ensure
// consistency in operation even with complex chain of mounting and unmounting
// Lets's say you are in a function which needs to mount if not already, and in
// the middle of itself calls function which indeed will need to unmount if not
// already. Well you better use safe or wrapped function which are made to
// rollback to previous state, so you can continue right after to do your
// things.
//
// As an extreme example: let's imagine that we have a function which is made
// to FORMAT the whole SPIFFS if a SPECIFIC content is written in the 4 first
// byte of that file. Also in such a case it should quickly create a bunch of
// skkeleton to get itself back to a known and wanted state. This behavior has
// to be done at every "manual" (not a lazy or internal event) mounting, just
// like an action upon boot.
/*
void my_spiffs_boot(){
uint8_t resetret[4];
// this lazy_mount since needed and can also report back the change on
state implied by eventual mount, if needed rdv40_spiffs_lazy_read((const char
*)".SHOULDRESET",(uint8_t *)resetret,4); if( resetret == "YESS" ) { uint8_t
changed = rdv40_spiffs_lazy_format(void); // this will imply change only if we where
already mounted beforehand, was the case after our reading without further
rollback rdv40_spiffs_lazy_mount_rollback(changed); // so if we were mounted
just get back to this state. If not, just don't.
[...]
}
[...]
}
*/
// Again : This will "toggle" spiffs mount status only if a "change" occurred
// (and should be fed by the result of a spiffs_lazy* function) If everything
// went well, it will return SPIFFS_OK if everything went well, and a report
// back the chain a SPI_ERRNO if not.
int rdv40_spiffs_lazy_mount_rollback(int changed) {
if (!changed) {
return SPIFFS_OK;
}
if (rdv40_spiffs_mounted()) {
return rdv40_spiffs_unmount();
}
return rdv40_spiffs_mount();
}
///////////////////////////////////////////////////////////////////////////////
// High level functions with SafetyLevel
// Beware that different safety level makes different return behavior
//
// RDV40_SPIFFS_SAFETY_NORMAL : will operate withtout further change on mount
// status RDV40_SPIFFS_SAFETY_LAZY : will ensure mount status already being in
// correct state before ops,
// will return !false if mount state had to change
// RDV40_SPIFFS_SAFETY_SAFE : will do same as RDV40_SPIFFS_SAFETY_LAZY
// will also safely rollback to previous state IF
// mount state had to change will return SPIFFS_OK /
// 0 / false if everything went well
// TODO : this functions are common enough to be unified with a switchcase
// statement or some function taking function parameters
// TODO : forbid writing to a filename which already exists as lnk !
// TODO : forbid writing to a filename.lnk which already exists without lnk !
// Note: Writing in SPIFFS_WRITE_CHUNK_SIZE (8192) byte chucks helps to ensure "free space" has been erased by GC (Garbage collection)
int rdv40_spiffs_write(const char *filename, const uint8_t *src, uint32_t size, RDV40SpiFFSSafetyLevel level) {
RDV40_SPIFFS_SAFE_FUNCTION(
uint32_t idx;
if (size <= SPIFFS_WRITE_CHUNK_SIZE) {
// write small file
write_to_spiffs(filename, src, size);
size = 0;
} else { //
// write first SPIFFS_WRITE_CHUNK_SIZE bytes
// need to write the first chuck of data, then append
write_to_spiffs(filename, src, SPIFFS_WRITE_CHUNK_SIZE);
}
// append remaing SPIFFS_WRITE_CHUNK_SIZE byte chuncks
for (idx = 1; idx < (size / SPIFFS_WRITE_CHUNK_SIZE); idx++) {
append_to_spiffs(filename, &src[SPIFFS_WRITE_CHUNK_SIZE * idx], SPIFFS_WRITE_CHUNK_SIZE);
}
// append remaing bytes
if (((int64_t)size - (SPIFFS_WRITE_CHUNK_SIZE * idx)) > 0) {
append_to_spiffs(filename, &src[SPIFFS_WRITE_CHUNK_SIZE * idx], size - (SPIFFS_WRITE_CHUNK_SIZE * idx));
}
)
}
int rdv40_spiffs_append(const char *filename, const uint8_t *src, uint32_t size, RDV40SpiFFSSafetyLevel level) {
RDV40_SPIFFS_SAFE_FUNCTION(
uint32_t idx;
// Append any SPIFFS_WRITE_CHUNK_SIZE byte chunks
for (idx = 0; idx < (size / SPIFFS_WRITE_CHUNK_SIZE); idx++) {
append_to_spiffs(filename, &src[SPIFFS_WRITE_CHUNK_SIZE * idx], SPIFFS_WRITE_CHUNK_SIZE);
}
// Append remain bytes
if (((int64_t)size - (SPIFFS_WRITE_CHUNK_SIZE * idx)) > 0) {
append_to_spiffs(filename, &src[SPIFFS_WRITE_CHUNK_SIZE * idx], size - (SPIFFS_WRITE_CHUNK_SIZE * idx));
}
)
}
// todo integrate reading symlinks transparently
int rdv40_spiffs_read(const char *filename, uint8_t *dst, uint32_t size, RDV40SpiFFSSafetyLevel level) {
RDV40_SPIFFS_SAFE_FUNCTION(
read_from_spiffs(filename, dst, size);
)
}
// TODO : forbid writing to a filename which already exists as lnk !
// TODO : forbid writing to a filename.lnk which already exists without lnk !
int rdv40_spiffs_rename(const char *old_filename, const char *new_filename, RDV40SpiFFSSafetyLevel level) {
RDV40_SPIFFS_SAFE_FUNCTION( //
rename_in_spiffs(old_filename, new_filename); //
)
}
int rdv40_spiffs_remove(const char *filename, RDV40SpiFFSSafetyLevel level) {
RDV40_SPIFFS_SAFE_FUNCTION( //
remove_from_spiffs(filename); //
)
}
int rdv40_spiffs_copy(const char *src_filename, const char *dst_filename, RDV40SpiFFSSafetyLevel level) {
RDV40_SPIFFS_SAFE_FUNCTION( //
copy_in_spiffs(src_filename, dst_filename); //
)
}
int rdv40_spiffs_stat(const char *filename, uint32_t *size_in_bytes, RDV40SpiFFSSafetyLevel level) {
RDV40_SPIFFS_SAFE_FUNCTION( //
*size_in_bytes = size_in_spiffs(filename); //
)
}
static int rdv40_spiffs_getfsinfo(rdv40_spiffs_fsinfo *fsinfo, RDV40SpiFFSSafetyLevel level) {
RDV40_SPIFFS_SAFE_FUNCTION( //
*fsinfo = info_of_spiffs(); //
)
}
// test for symlink from filename
int rdv40_spiffs_is_symlink(const char *s) {
int ret = 0;
if (s != NULL) {
size_t size = strlen(s);
if (size >= 4 && s[size - 4] == '.' && s[size - 3] == 'l' && s[size - 2] == 'n' && s[size - 1] == 'k') {
ret = 1;
}
}
return ret;
}
// since FILENAME can't be longer than 32Bytes as of hard configuration, we're
// safe with Such maximum. So the "size" variable is actually the known/intended
// size of DESTINATION file, may it be known (may we provide a "stat from
// symlink ?")
// ATTENTION : you must NOT provide the whole filename (so please do not include the .lnk extension)
// TODO : integrate in read_function
int rdv40_spiffs_read_as_symlink(const char *filename, uint8_t *dst, uint32_t size, RDV40SpiFFSSafetyLevel level) {
RDV40_SPIFFS_SAFE_FUNCTION(
char linkdest[SPIFFS_OBJ_NAME_LEN];
char linkfilename[SPIFFS_OBJ_NAME_LEN];
sprintf(linkfilename, "%s.lnk", filename);
if (g_dbglevel >= DBG_DEBUG)
Dbprintf("Link real filename is " _YELLOW_("%s"), linkfilename);
read_from_spiffs((char *)linkfilename, (uint8_t *)linkdest, SPIFFS_OBJ_NAME_LEN);
if (g_dbglevel >= DBG_DEBUG)
Dbprintf("Symlink destination is " _YELLOW_("%s"), linkdest);
read_from_spiffs((char *)linkdest, (uint8_t *)dst, size);
)
}
// BEWARE ! This function is DESTRUCTIVE as it will UPDATE an existing symlink
// Since it creates a .lnk extension file it may be minor to mistake the order of arguments
// Still please use this function with care.
// Also, remind that it will NOT check if destination filename actually exists
// As a mnenotechnic, think about the "ln" unix command, which order is the same as "cp" unix command
// in regard of arguments orders.
// Eg :
// rdv40_spiffs_make_symlink((uint8_t *)"hello", (uint8_t *)"world", RDV40_SPIFFS_SAFETY_SAFE)
// will generate a file named "world.lnk" with the path to file "hello" written in
// which you can then read back with :
// rdv40_spiffs_read_as_symlink((uint8_t *)"world",(uint8_t *) buffer, orig_file_size, RDV40_SPIFFS_SAFETY_SAFE);
// TODO : FORBID creating a symlink with a basename (before.lnk) which already exists as a file !
int rdv40_spiffs_make_symlink(const char *linkdest, const char *filename, RDV40SpiFFSSafetyLevel level) {
RDV40_SPIFFS_SAFE_FUNCTION(
char linkfilename[SPIFFS_OBJ_NAME_LEN];
sprintf(linkfilename, "%s.lnk", filename);
write_to_spiffs(linkfilename, (const uint8_t *)linkdest, SPIFFS_OBJ_NAME_LEN);
)
}
// filename and filename.lnk will both the existence-checked
// if filename exists, read will be used, if filename.lnk exists, read_as_symlink will be used
// Both existence is not handled right now and should not happen or create a default fallback behavior
// Still, this case won't happen when the write(s) functions will check for both symlink and real file
// preexistence, avoiding a link being created if filename exists, or avoiding a file being created if
// symlink exists with same name
int rdv40_spiffs_read_as_filetype(const char *filename, uint8_t *dst, uint32_t size, RDV40SpiFFSSafetyLevel level) {
RDV40_SPIFFS_SAFE_FUNCTION(
RDV40SpiFFSFileType filetype = filetype_in_spiffs((char *)filename);
switch (filetype) {
case RDV40_SPIFFS_FILETYPE_REAL:
rdv40_spiffs_read(filename, dst, size, level);
break;
case RDV40_SPIFFS_FILETYPE_SYMLINK:
rdv40_spiffs_read_as_symlink(filename, dst, size, level);
break;
case RDV40_SPIFFS_FILETYPE_BOTH:
case RDV40_SPIFFS_FILETYPE_UNKNOWN:
default:
break;
}
)
}
// TODO regarding reads/write and symlinks :
// Provide a higher level readFile function which
// - don't need a size to be provided, getting it from STAT call and using bigbuff malloc
// - send back the whole read file as return Result
// Maybe a good think to implement a VFS api here.
////////////////////////////////////////////////////////////////////////////////
///////// MISC HIGH LEVEL FUNCTIONS ////////////////////////////////////////////
#define SPIFFS_BANNER DbpString(_CYAN_("Flash Memory FileSystem tree (SPIFFS)"));
void rdv40_spiffs_safe_print_fsinfo(void) {
rdv40_spiffs_fsinfo fsinfo;
rdv40_spiffs_getfsinfo(&fsinfo, RDV40_SPIFFS_SAFETY_SAFE);
Dbprintf(" Logical block size... " _YELLOW_("%d")" bytes", fsinfo.blockSize);
Dbprintf(" Logical page size.... " _YELLOW_("%d")" bytes", fsinfo.pageSize);
Dbprintf(" Max open files....... " _YELLOW_("%d")" file descriptors", fsinfo.maxOpenFiles);
Dbprintf(" Max path length...... " _YELLOW_("%d")" chars", fsinfo.maxPathLength);
DbpString("");
Dbprintf(" Filesystem size used available use% mounted");
DbpString("------------------------------------------------------------------");
Dbprintf(" spiffs %6d B %6d B %6d B " _YELLOW_("%2d%")" /"
, fsinfo.totalBytes
, fsinfo.usedBytes
, fsinfo.freeBytes
, fsinfo.usedPercent
);
DbpString("");
}
// this function is safe and WILL rollback since it is only a PRINTING function,
// not a function intended to give any sort of struct to manipulate the FS
// objects
// TODO : Fake the Directory availability by splitting strings , buffering,
// maintaining prefix list sorting, unique_checking, THEN outputting precomputed
// tree Other solution would be to add directory support to SPIFFS, but that we
// don't want, as prefix are way easier and lighter in every aspect.
void rdv40_spiffs_safe_print_tree(void) {
int changed = rdv40_spiffs_lazy_mount();
spiffs_DIR d;
struct spiffs_dirent e;
struct spiffs_dirent *pe = &e;
SPIFFS_opendir(&fs, "/", &d);
while ((pe = SPIFFS_readdir(&d, pe))) {
char resolvedlink[11 + SPIFFS_OBJ_NAME_LEN];
if (rdv40_spiffs_is_symlink((const char *)pe->name)) {
char linkdest[SPIFFS_OBJ_NAME_LEN];
read_from_spiffs((char *)pe->name, (uint8_t *)linkdest, SPIFFS_OBJ_NAME_LEN);
sprintf(resolvedlink, "(.lnk) --> %s", linkdest);
// Kind of stripping the .lnk extension
strtok((char *)pe->name, ".");
} else {
memset(resolvedlink, 0, sizeof(resolvedlink));
}
Dbprintf("[%04x]\t " _YELLOW_("%i") " B |-- %s%s", pe->obj_id, pe->size, pe->name, resolvedlink);
}
SPIFFS_closedir(&d);
rdv40_spiffs_lazy_mount_rollback(changed);
}
void rdv40_spiffs_safe_wipe(void) {
int changed = rdv40_spiffs_lazy_mount();
spiffs_DIR d;
struct spiffs_dirent e;
struct spiffs_dirent *pe = &e;
SPIFFS_opendir(&fs, "/", &d);
while ((pe = SPIFFS_readdir(&d, pe))) {
if (rdv40_spiffs_is_symlink((const char *)pe->name)) {
char linkdest[SPIFFS_OBJ_NAME_LEN];
read_from_spiffs((char *)pe->name, (uint8_t *)linkdest, SPIFFS_OBJ_NAME_LEN);
remove_from_spiffs(linkdest);
Dbprintf(".lnk removed %s", pe->name);
remove_from_spiffs((char *)pe->name);
Dbprintf("removed %s", linkdest);
} else {
remove_from_spiffs((char *)pe->name);
Dbprintf("removed %s", pe->name);
}
}
SPIFFS_closedir(&d);
rdv40_spiffs_lazy_mount_rollback(changed);
}
// Selftest function
void test_spiffs(void) {
Dbprintf("----------------------------------------------");
Dbprintf("Testing SPIFFS operations");
Dbprintf("----------------------------------------------");
Dbprintf("-- all test are made using lazy safetylevel");
Dbprintf(" Mounting filesystem (lazy).......");
int changed = rdv40_spiffs_lazy_mount();
Dbprintf(" Printing tree..............");
rdv40_spiffs_safe_print_tree();
Dbprintf(" Writing 'I love Proxmark3 RDV4' in a testspiffs.txt");
// Since We lazy_mounted manually before hand, the write safety level will
// just imply noops
rdv40_spiffs_write((char *)"testspiffs.txt", (uint8_t *)"I love Proxmark3 RDV4", 21, RDV40_SPIFFS_SAFETY_SAFE);
Dbprintf(" Printing tree again.......");
rdv40_spiffs_safe_print_tree();
Dbprintf(" Making a symlink to testspiffs.txt");
rdv40_spiffs_make_symlink((char *)"testspiffs.txt", (char *)"linktotestspiffs.txt", RDV40_SPIFFS_SAFETY_SAFE);
Dbprintf(" Printing tree again.......");
rdv40_spiffs_safe_print_tree();
// TODO READBACK, rename,print tree read back, remove, print tree;
Dbprintf(" Rollbacking The mount status IF things have changed");
rdv40_spiffs_lazy_mount_rollback(changed);
Dbprintf(_GREEN_("All done"));
return;
}
///////////////////////////////////////////////////////////////////////////////
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