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https://github.com/trezor/trezor-firmware.git
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core/fatfs: ensure functions can only be called on a mounted filesystem
ff.c has a lazy-mounting feature, where any filesystem call will mount the volume if it can. This messes with predictability of the mounted state, so all (except mount/unmount/mkfs) Python functions will first check if the fs is mounted.
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@ -34,6 +34,13 @@ static FATFS fs_instance;
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bool _fatfs_instance_is_mounted() { return fs_instance.fs_type != 0; }
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bool _fatfs_instance_is_mounted() { return fs_instance.fs_type != 0; }
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void _fatfs_unmount_instance() { fs_instance.fs_type = 0; }
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void _fatfs_unmount_instance() { fs_instance.fs_type = 0; }
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#define FATFS_ONLY_MOUNTED \
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{ \
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if (!_fatfs_instance_is_mounted()) { \
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mp_raise_OSError(MP_ENODEV); \
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} \
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}
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DSTATUS disk_initialize(BYTE pdrv) { return disk_status(pdrv); }
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DSTATUS disk_initialize(BYTE pdrv) { return disk_status(pdrv); }
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DSTATUS disk_status(BYTE pdrv) {
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DSTATUS disk_status(BYTE pdrv) {
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@ -327,6 +334,7 @@ STATIC const mp_obj_type_t mod_trezorio_FatFSDir_type = {
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/// Open or create a file
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/// Open or create a file
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/// """
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/// """
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STATIC mp_obj_t mod_trezorio_fatfs_open(mp_obj_t path, mp_obj_t flags) {
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STATIC mp_obj_t mod_trezorio_fatfs_open(mp_obj_t path, mp_obj_t flags) {
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FATFS_ONLY_MOUNTED;
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mp_buffer_info_t _path, _flags;
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mp_buffer_info_t _path, _flags;
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mp_get_buffer_raise(path, &_path, MP_BUFFER_READ);
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mp_get_buffer_raise(path, &_path, MP_BUFFER_READ);
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mp_get_buffer_raise(flags, &_flags, MP_BUFFER_READ);
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mp_get_buffer_raise(flags, &_flags, MP_BUFFER_READ);
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@ -369,6 +377,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorio_fatfs_open_obj,
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/// List a directory (return generator)
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/// List a directory (return generator)
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/// """
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/// """
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STATIC mp_obj_t mod_trezorio_fatfs_listdir(mp_obj_t path) {
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STATIC mp_obj_t mod_trezorio_fatfs_listdir(mp_obj_t path) {
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FATFS_ONLY_MOUNTED;
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mp_buffer_info_t _path;
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mp_buffer_info_t _path;
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mp_get_buffer_raise(path, &_path, MP_BUFFER_READ);
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mp_get_buffer_raise(path, &_path, MP_BUFFER_READ);
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DIR dp;
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DIR dp;
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@ -389,6 +398,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorio_fatfs_listdir_obj,
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/// Create a sub directory
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/// Create a sub directory
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/// """
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/// """
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STATIC mp_obj_t mod_trezorio_fatfs_mkdir(size_t n_args, const mp_obj_t *args) {
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STATIC mp_obj_t mod_trezorio_fatfs_mkdir(size_t n_args, const mp_obj_t *args) {
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FATFS_ONLY_MOUNTED;
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mp_buffer_info_t path;
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mp_buffer_info_t path;
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mp_get_buffer_raise(args[0], &path, MP_BUFFER_READ);
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mp_get_buffer_raise(args[0], &path, MP_BUFFER_READ);
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FRESULT res = f_mkdir(path.buf);
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FRESULT res = f_mkdir(path.buf);
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@ -409,6 +419,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_trezorio_fatfs_mkdir_obj, 1, 2,
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/// Delete an existing file or directory
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/// Delete an existing file or directory
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/// """
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/// """
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STATIC mp_obj_t mod_trezorio_fatfs_unlink(mp_obj_t path) {
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STATIC mp_obj_t mod_trezorio_fatfs_unlink(mp_obj_t path) {
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FATFS_ONLY_MOUNTED;
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mp_buffer_info_t _path;
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mp_buffer_info_t _path;
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mp_get_buffer_raise(path, &_path, MP_BUFFER_READ);
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mp_get_buffer_raise(path, &_path, MP_BUFFER_READ);
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FRESULT res = f_unlink(_path.buf);
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FRESULT res = f_unlink(_path.buf);
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@ -425,6 +436,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorio_fatfs_unlink_obj,
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/// Get file status
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/// Get file status
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/// """
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/// """
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STATIC mp_obj_t mod_trezorio_fatfs_stat(mp_obj_t path) {
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STATIC mp_obj_t mod_trezorio_fatfs_stat(mp_obj_t path) {
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FATFS_ONLY_MOUNTED;
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mp_buffer_info_t _path;
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mp_buffer_info_t _path;
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mp_get_buffer_raise(path, &_path, MP_BUFFER_READ);
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mp_get_buffer_raise(path, &_path, MP_BUFFER_READ);
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FILINFO info;
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FILINFO info;
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@ -442,6 +454,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorio_fatfs_stat_obj,
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/// Rename/Move a file or directory
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/// Rename/Move a file or directory
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/// """
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/// """
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STATIC mp_obj_t mod_trezorio_fatfs_rename(mp_obj_t oldpath, mp_obj_t newpath) {
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STATIC mp_obj_t mod_trezorio_fatfs_rename(mp_obj_t oldpath, mp_obj_t newpath) {
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FATFS_ONLY_MOUNTED;
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mp_buffer_info_t _oldpath, _newpath;
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mp_buffer_info_t _oldpath, _newpath;
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mp_get_buffer_raise(oldpath, &_oldpath, MP_BUFFER_READ);
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mp_get_buffer_raise(oldpath, &_oldpath, MP_BUFFER_READ);
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mp_get_buffer_raise(newpath, &_newpath, MP_BUFFER_READ);
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mp_get_buffer_raise(newpath, &_newpath, MP_BUFFER_READ);
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@ -513,9 +526,10 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_0(mod_trezorio_fatfs_mkfs_obj,
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/// Set volume label
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/// Set volume label
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/// """
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/// """
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STATIC mp_obj_t mod_trezorio_fatfs_setlabel(mp_obj_t label) {
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STATIC mp_obj_t mod_trezorio_fatfs_setlabel(mp_obj_t label) {
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if (_fatfs_instance_is_mounted()) {
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/* setlabel is marked as only-mounted, because "mounting" in ff.c terms means
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mp_raise_OSError(MP_EBUSY);
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having parsed the FAT table, which is of course a prerequisite for setting
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}
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label. */
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FATFS_ONLY_MOUNTED;
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mp_buffer_info_t _label;
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mp_buffer_info_t _label;
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mp_get_buffer_raise(label, &_label, MP_BUFFER_READ);
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mp_get_buffer_raise(label, &_label, MP_BUFFER_READ);
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FRESULT res = f_setlabel(_label.buf);
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FRESULT res = f_setlabel(_label.buf);
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