circuitpython/shared-bindings/storage/__init__.c

317 lines
13 KiB
C

/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George
* Copyright (c) 2015 Josef Gajdusek
* Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <string.h>
#include "extmod/vfs_fat.h"
#include "py/obj.h"
#include "py/objnamedtuple.h"
#include "py/runtime.h"
#include "shared-bindings/storage/__init__.h"
#include "supervisor/flash.h"
//| """Storage management
//|
//| The `storage` provides storage management functionality such as mounting and
//| unmounting which is typically handled by the operating system hosting Python.
//| CircuitPython does not have an OS, so this module provides this functionality
//| directly.
//|
//| For more information regarding using the `storage` module, refer to the `CircuitPython
//| Essentials Learn guide
//| <https://learn.adafruit.com/circuitpython-essentials/circuitpython-storage>`_.
//| """
//|
//| def mount(filesystem: VfsFat, mount_path: str, *, readonly: bool = False) -> None:
//| """Mounts the given filesystem object at the given path.
//|
//| This is the CircuitPython analog to the UNIX ``mount`` command.
//|
//| :param VfsFat filesystem: The filesystem to mount.
//| :param str mount_path: Where to mount the filesystem.
//| :param bool readonly: True when the filesystem should be readonly to CircuitPython.
//| """
//| ...
//|
STATIC mp_obj_t storage_mount(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_filesystem, ARG_mount_path, ARG_readonly };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_filesystem, MP_ARG_OBJ | MP_ARG_REQUIRED },
{ MP_QSTR_mount_path, MP_ARG_OBJ | MP_ARG_REQUIRED },
{ MP_QSTR_readonly, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
// get the mount point
const char *mnt_str = mp_obj_str_get_str(args[ARG_mount_path].u_obj);
// Make sure we're given an object we can mount.
// TODO(tannewt): Make sure we have all the methods we need to operating it
// as a file system.
mp_obj_t vfs_obj = args[ARG_filesystem].u_obj;
mp_obj_t dest[2];
mp_load_method_maybe(vfs_obj, MP_QSTR_mount, dest);
if (dest[0] == MP_OBJ_NULL) {
mp_raise_ValueError(MP_ERROR_TEXT("filesystem must provide mount method"));
}
common_hal_storage_mount(vfs_obj, mnt_str, args[ARG_readonly].u_bool);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(storage_mount_obj, 0, storage_mount);
//| def umount(mount: Union[str, VfsFat]) -> None:
//| """Unmounts the given filesystem object or if *mount* is a path, then unmount
//| the filesystem mounted at that location.
//|
//| This is the CircuitPython analog to the UNIX ``umount`` command."""
//| ...
//|
STATIC mp_obj_t storage_umount(mp_obj_t mnt_in) {
if (mp_obj_is_str(mnt_in)) {
common_hal_storage_umount_path(mp_obj_str_get_str(mnt_in));
} else {
common_hal_storage_umount_object(mnt_in);
}
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_1(storage_umount_obj, storage_umount);
//| def remount(
//| mount_path: str,
//| readonly: bool = False,
//| *,
//| disable_concurrent_write_protection: bool = False
//| ) -> None:
//| """Remounts the given path with new parameters.
//|
//| :param str mount_path: The path to remount.
//| :param bool readonly: True when the filesystem should be readonly to CircuitPython.
//| :param bool disable_concurrent_write_protection: When True, the check that makes sure the
//| underlying filesystem data is written by one computer is disabled. Disabling the protection
//| allows CircuitPython and a host to write to the same filesystem with the risk that the
//| filesystem will be corrupted."""
//| ...
//|
STATIC mp_obj_t storage_remount(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_mount_path, ARG_readonly, ARG_disable_concurrent_write_protection };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_mount_path, MP_ARG_OBJ | MP_ARG_REQUIRED },
{ MP_QSTR_readonly, MP_ARG_BOOL, {.u_bool = false} },
{ MP_QSTR_disable_concurrent_write_protection, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
const char *mnt_str = mp_obj_str_get_str(args[ARG_mount_path].u_obj);
common_hal_storage_remount(mnt_str, args[ARG_readonly].u_bool, args[ARG_disable_concurrent_write_protection].u_bool);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(storage_remount_obj, 0, storage_remount);
//| def getmount(mount_path: str) -> VfsFat:
//| """Retrieves the mount object associated with the mount path"""
//| ...
//|
STATIC mp_obj_t storage_getmount(const mp_obj_t mnt_in) {
return common_hal_storage_getmount(mp_obj_str_get_str(mnt_in));
}
MP_DEFINE_CONST_FUN_OBJ_1(storage_getmount_obj, storage_getmount);
//| def erase_filesystem(extended: Optional[bool] = None) -> None:
//| """Erase and re-create the ``CIRCUITPY`` filesystem.
//|
//| On boards that present USB-visible ``CIRCUITPY`` drive (e.g., SAMD21 and SAMD51),
//| then call `microcontroller.reset()` to restart CircuitPython and have the
//| host computer remount CIRCUITPY.
//|
//| This function can be called from the REPL when ``CIRCUITPY``
//| has become corrupted.
//|
//| :param bool extended: On boards that support ``dualbank`` module
//| and the ``extended`` parameter, the ``CIRCUITPY`` storage can be
//| extended by setting this to `True`. If this isn't provided or
//| set to `None` (default), the existing configuration will be used.
//|
//| .. note:: New firmware starts with storage extended. In case of an existing
//| filesystem (e.g. uf2 load), the existing extension setting is preserved.
//|
//| .. warning:: All the data on ``CIRCUITPY`` will be lost, and
//| CircuitPython will restart on certain boards."""
//| ...
//|
STATIC mp_obj_t storage_erase_filesystem(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_extended };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_extended, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
#if CIRCUITPY_STORAGE_EXTEND
bool extended = (args[ARG_extended].u_obj == mp_const_none) ? supervisor_flash_get_extended() : mp_obj_is_true(args[ARG_extended].u_obj);
common_hal_storage_erase_filesystem(extended);
#else
if (mp_obj_is_true(args[ARG_extended].u_obj)) {
mp_raise_NotImplementedError_varg(MP_ERROR_TEXT("%q=%q"), MP_QSTR_extended, MP_QSTR_True);
}
common_hal_storage_erase_filesystem(false);
#endif
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(storage_erase_filesystem_obj, 0, storage_erase_filesystem);
//| def disable_usb_drive() -> None:
//| """Disable presenting ``CIRCUITPY`` as a USB mass storage device.
//| By default, the device is enabled and ``CIRCUITPY`` is visible.
//| Can be called in ``boot.py``, before USB is connected."""
//| ...
//|
STATIC mp_obj_t storage_disable_usb_drive(void) {
#if CIRCUITPY_USB_MSC
if (!common_hal_storage_disable_usb_drive()) {
#else
if (true) {
#endif
mp_raise_RuntimeError(MP_ERROR_TEXT("Cannot change USB devices now"));
}
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_0(storage_disable_usb_drive_obj, storage_disable_usb_drive);
//| def enable_usb_drive() -> None:
//| """Enabled presenting ``CIRCUITPY`` as a USB mass storage device.
//| By default, the device is enabled and ``CIRCUITPY`` is visible,
//| so you do not normally need to call this function.
//| Can be called in ``boot.py``, before USB is connected.
//|
//| If you enable too many devices at once, you will run out of USB endpoints.
//| The number of available endpoints varies by microcontroller.
//| CircuitPython will go into safe mode after running boot.py to inform you if
//| not enough endpoints are available.
//| """
//| ...
//|
STATIC mp_obj_t storage_enable_usb_drive(void) {
#if CIRCUITPY_USB_MSC
if (!common_hal_storage_enable_usb_drive()) {
#else
if (true) {
#endif
mp_raise_RuntimeError(MP_ERROR_TEXT("Cannot change USB devices now"));
}
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_0(storage_enable_usb_drive_obj, storage_enable_usb_drive);
STATIC const mp_rom_map_elem_t storage_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_storage) },
{ MP_ROM_QSTR(MP_QSTR_mount), MP_ROM_PTR(&storage_mount_obj) },
{ MP_ROM_QSTR(MP_QSTR_umount), MP_ROM_PTR(&storage_umount_obj) },
{ MP_ROM_QSTR(MP_QSTR_remount), MP_ROM_PTR(&storage_remount_obj) },
{ MP_ROM_QSTR(MP_QSTR_getmount), MP_ROM_PTR(&storage_getmount_obj) },
{ MP_ROM_QSTR(MP_QSTR_erase_filesystem), MP_ROM_PTR(&storage_erase_filesystem_obj) },
{ MP_ROM_QSTR(MP_QSTR_disable_usb_drive), MP_ROM_PTR(&storage_disable_usb_drive_obj) },
{ MP_ROM_QSTR(MP_QSTR_enable_usb_drive), MP_ROM_PTR(&storage_enable_usb_drive_obj) },
//| class VfsFat:
//| def __init__(self, block_device: BlockDevice) -> None:
//| """Create a new VfsFat filesystem around the given block device.
//|
//| :param block_device: Block device the the filesystem lives on"""
//| label: str
//| """The filesystem label, up to 11 case-insensitive bytes. Note that
//| this property can only be set when the device is writable by the
//| microcontroller."""
//| ...
//| readonly: bool
//| """``True`` when the device is mounted as readonly by the microcontroller.
//| This property cannot be changed, use `storage.remount` instead."""
//| ...
//|
//| @staticmethod
//| def mkfs(block_device: BlockDevice) -> None:
//| """Format the block device, deleting any data that may have been there.
//|
//| **Limitations**: On SAMD21 builds, `mkfs()` will raise ``OSError(22)`` when
//| attempting to format filesystems larger than 4GB. The extra code to format larger
//| filesystems will not fit on these builds. You can still access
//| larger filesystems, but you will need to format the filesystem on another device.
//| """
//| ...
//| def open(self, path: str, mode: str) -> None:
//| """Like builtin ``open()``"""
//| ...
//| def ilistdir(
//| self, path: str
//| ) -> Iterator[Union[Tuple[AnyStr, int, int, int], Tuple[AnyStr, int, int]]]:
//| """Return an iterator whose values describe files and folders within
//| ``path``"""
//| ...
//| def mkdir(self, path: str) -> None:
//| """Like `os.mkdir`"""
//| ...
//| def rmdir(self, path: str) -> None:
//| """Like `os.rmdir`"""
//| ...
//| def stat(self, path: str) -> Tuple[int, int, int, int, int, int, int, int, int, int]:
//| """Like `os.stat`"""
//| ...
//| def statvfs(self, path: int) -> Tuple[int, int, int, int, int, int, int, int, int, int]:
//| """Like `os.statvfs`"""
//| ...
//| def mount(self, readonly: bool, mkfs: VfsFat) -> None:
//| """Don't call this directly, call `storage.mount`."""
//| ...
//| def umount(self) -> None:
//| """Don't call this directly, call `storage.umount`."""
//| ...
//|
{ MP_ROM_QSTR(MP_QSTR_VfsFat), MP_ROM_PTR(&mp_fat_vfs_type) },
};
STATIC MP_DEFINE_CONST_DICT(storage_module_globals, storage_module_globals_table);
const mp_obj_module_t storage_module = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t *)&storage_module_globals,
};
MP_REGISTER_MODULE(MP_QSTR_storage, storage_module);