2014-12-27 20:20:51 +00:00
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/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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2015-11-24 22:43:11 +00:00
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#include "py/mpconfig.h"
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#if MICROPY_FSUSERMOUNT
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2016-02-09 22:51:47 +00:00
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#include <string.h>
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#include <errno.h>
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2015-11-24 22:43:11 +00:00
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2015-01-01 21:06:20 +00:00
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#include "py/nlr.h"
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#include "py/runtime.h"
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2015-03-04 20:35:41 +00:00
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#include "lib/fatfs/ff.h"
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2014-12-27 20:20:51 +00:00
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#include "fsusermount.h"
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2016-02-09 22:50:07 +00:00
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STATIC mp_obj_t fatfs_mount_mkfs(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args, bool mkfs) {
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2014-12-27 20:20:51 +00:00
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_readonly, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
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{ MP_QSTR_mkfs, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
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};
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// parse args
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mp_obj_t device = pos_args[0];
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mp_obj_t mount_point = pos_args[1];
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all(n_args - 2, pos_args + 2, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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// get the mount point
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mp_uint_t mnt_len;
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const char *mnt_str = mp_obj_str_get_data(mount_point, &mnt_len);
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if (device == mp_const_none) {
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// umount
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FRESULT res = FR_NO_FILESYSTEM;
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2016-02-10 16:32:57 +00:00
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for (size_t i = 0; i < MP_ARRAY_SIZE(MP_STATE_PORT(fs_user_mount)); ++i) {
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fs_user_mount_t *vfs = MP_STATE_PORT(fs_user_mount)[i];
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if (vfs != NULL && !memcmp(mnt_str, vfs->str, mnt_len + 1)) {
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res = f_mount(NULL, vfs->str, 0);
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if (vfs->flags & FSUSER_FREE_OBJ) {
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m_del_obj(fs_user_mount_t, vfs);
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}
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MP_STATE_PORT(fs_user_mount)[i] = NULL;
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break;
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}
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2014-12-27 20:20:51 +00:00
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}
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if (res != FR_OK) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "can't umount"));
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}
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} else {
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// mount
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2016-02-10 16:32:57 +00:00
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size_t i = 0;
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for (; i < MP_ARRAY_SIZE(MP_STATE_PORT(fs_user_mount)); ++i) {
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if (MP_STATE_PORT(fs_user_mount)[i] == NULL) {
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break;
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}
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}
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if (i == MP_ARRAY_SIZE(MP_STATE_PORT(fs_user_mount))) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "too many devices mounted"));
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2014-12-27 20:20:51 +00:00
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}
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// create new object
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2016-02-06 20:25:16 +00:00
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fs_user_mount_t *vfs;
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2016-02-10 16:32:57 +00:00
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MP_STATE_PORT(fs_user_mount)[i] = vfs = m_new_obj(fs_user_mount_t);
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2016-02-06 20:25:16 +00:00
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vfs->str = mnt_str;
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vfs->len = mnt_len;
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2016-02-10 16:32:57 +00:00
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vfs->flags = FSUSER_FREE_OBJ;
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2014-12-27 20:20:51 +00:00
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// load block protocol methods
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2016-02-06 20:25:16 +00:00
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mp_load_method(device, MP_QSTR_readblocks, vfs->readblocks);
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mp_load_method_maybe(device, MP_QSTR_writeblocks, vfs->writeblocks);
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2016-02-09 14:28:50 +00:00
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mp_load_method_maybe(device, MP_QSTR_ioctl, vfs->u.ioctl);
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if (vfs->u.ioctl[0] != MP_OBJ_NULL) {
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// device supports new block protocol, so indicate it
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2016-02-10 16:32:57 +00:00
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vfs->flags |= FSUSER_HAVE_IOCTL;
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2016-02-09 14:28:50 +00:00
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} else {
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// no ioctl method, so assume the device uses the old block protocol
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mp_load_method_maybe(device, MP_QSTR_sync, vfs->u.old.sync);
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mp_load_method(device, MP_QSTR_count, vfs->u.old.count);
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}
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2014-12-27 20:20:51 +00:00
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// Read-only device indicated by writeblocks[0] == MP_OBJ_NULL.
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// User can specify read-only device by:
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// 1. readonly=True keyword argument
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// 2. nonexistent writeblocks method (then writeblocks[0] == MP_OBJ_NULL already)
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if (args[0].u_bool) {
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2016-02-06 20:25:16 +00:00
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vfs->writeblocks[0] = MP_OBJ_NULL;
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2014-12-27 20:20:51 +00:00
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}
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2016-02-09 22:50:07 +00:00
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// mount the block device (if mkfs, only pre-mount)
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FRESULT res = f_mount(&vfs->fatfs, vfs->str, !mkfs);
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2014-12-27 20:20:51 +00:00
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// check the result
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if (res == FR_OK) {
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2016-02-09 22:50:07 +00:00
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if (mkfs) {
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goto mkfs;
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}
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2014-12-27 20:20:51 +00:00
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} else if (res == FR_NO_FILESYSTEM && args[1].u_bool) {
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2016-02-09 22:50:07 +00:00
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mkfs:
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2016-02-06 20:25:16 +00:00
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res = f_mkfs(vfs->str, 1, 0);
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2014-12-27 20:20:51 +00:00
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if (res != FR_OK) {
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2016-02-09 22:50:07 +00:00
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mkfs_error:
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2014-12-27 20:20:51 +00:00
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "can't mkfs"));
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}
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2016-02-09 22:50:07 +00:00
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if (mkfs) {
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// If requested to only mkfs, unmount pre-mounted device
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res = f_mount(NULL, vfs->str, 0);
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if (res != FR_OK) {
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goto mkfs_error;
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}
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2016-02-10 16:32:57 +00:00
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MP_STATE_PORT(fs_user_mount)[i] = NULL;
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2016-02-09 22:50:07 +00:00
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}
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2014-12-27 20:20:51 +00:00
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} else {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "can't mount"));
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}
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/*
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2016-02-06 20:25:16 +00:00
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if (vfs->writeblocks[0] == MP_OBJ_NULL) {
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2014-12-27 20:20:51 +00:00
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printf("mounted read-only");
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} else {
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printf("mounted read-write");
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}
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DWORD nclst;
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FATFS *fatfs;
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2016-02-06 20:25:16 +00:00
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f_getfree(vfs->str, &nclst, &fatfs);
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printf(" on %s with %u bytes free\n", vfs->str, (uint)(nclst * fatfs->csize * 512));
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2014-12-27 20:20:51 +00:00
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*/
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}
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return mp_const_none;
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}
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2016-02-09 22:50:07 +00:00
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STATIC mp_obj_t fatfs_mount(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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return fatfs_mount_mkfs(n_args, pos_args, kw_args, false);
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}
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MP_DEFINE_CONST_FUN_OBJ_KW(fsuser_mount_obj, 2, fatfs_mount);
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2016-02-09 22:51:47 +00:00
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STATIC mp_obj_t fatfs_umount(mp_obj_t bdev_or_path_in) {
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2016-02-10 16:32:57 +00:00
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size_t i = 0;
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2016-02-09 22:51:47 +00:00
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if (MP_OBJ_IS_STR(bdev_or_path_in)) {
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mp_uint_t mnt_len;
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const char *mnt_str = mp_obj_str_get_data(bdev_or_path_in, &mnt_len);
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2016-02-10 16:32:57 +00:00
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for (; i < MP_ARRAY_SIZE(MP_STATE_PORT(fs_user_mount)); ++i) {
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fs_user_mount_t *vfs = MP_STATE_PORT(fs_user_mount)[i];
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if (!memcmp(mnt_str, vfs->str, mnt_len + 1)) {
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break;
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}
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2016-02-09 22:51:47 +00:00
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}
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2016-02-10 16:32:57 +00:00
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} else {
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for (; i < MP_ARRAY_SIZE(MP_STATE_PORT(fs_user_mount)); ++i) {
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fs_user_mount_t *vfs = MP_STATE_PORT(fs_user_mount)[i];
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if (bdev_or_path_in == vfs->readblocks[1]) {
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break;
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}
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}
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}
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if (i == MP_ARRAY_SIZE(MP_STATE_PORT(fs_user_mount))) {
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nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(EINVAL)));
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2016-02-09 22:51:47 +00:00
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}
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2016-02-10 16:32:57 +00:00
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fs_user_mount_t *vfs = MP_STATE_PORT(fs_user_mount)[i];
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FRESULT res = f_mount(NULL, vfs->str, 0);
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if (vfs->flags & FSUSER_FREE_OBJ) {
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m_del_obj(fs_user_mount_t, vfs);
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}
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MP_STATE_PORT(fs_user_mount)[i] = NULL;
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2016-02-09 22:51:47 +00:00
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if (res != FR_OK) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "can't umount"));
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}
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(fsuser_umount_obj, fatfs_umount);
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2016-02-09 22:50:07 +00:00
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STATIC mp_obj_t fatfs_mkfs(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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return fatfs_mount_mkfs(n_args, pos_args, kw_args, true);
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}
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MP_DEFINE_CONST_FUN_OBJ_KW(fsuser_mkfs_obj, 2, fatfs_mkfs);
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2015-11-24 22:43:11 +00:00
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#endif // MICROPY_FSUSERMOUNT
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