mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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654 lines
19 KiB
C
654 lines
19 KiB
C
/*
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* Copyright (c) 2018-2019 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <errno.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <time.h>
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#include <fcntl.h>
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#include <sys/iosupport.h>
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#include <sys/param.h>
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#include <unistd.h>
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#include "lib/fatfs/ff.h"
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#if FF_VOLUMES != 10
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#error "FatFs misconfigured, expected FF_VOLUMES == 10"
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#endif
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#include "fs_dev.h"
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/* Quite a bit of code comes from https://github.com/switchbrew/libnx/blob/master/nx/source/runtime/devices/fs_dev.c */
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static int fsdev_convert_rc(struct _reent *r, FRESULT rc);
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static void fsdev_filinfo_to_st(struct stat *st, const FILINFO *info);
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static int fsdev_open(struct _reent *r, void *fileStruct, const char *path, int flags, int mode);
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static int fsdev_close(struct _reent *r, void *fd);
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static ssize_t fsdev_write(struct _reent *r, void *fd, const char *ptr, size_t len);
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static ssize_t fsdev_read(struct _reent *r, void *fd, char *ptr, size_t len);
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static off_t fsdev_seek(struct _reent *r, void *fd, off_t pos, int dir);
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static int fsdev_fstat(struct _reent *r, void *fd, struct stat *st);
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static int fsdev_stat(struct _reent *r, const char *file, struct stat *st);
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static int fsdev_link(struct _reent *r, const char *existing, const char *newLink);
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static int fsdev_unlink(struct _reent *r, const char *name);
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static int fsdev_chdir(struct _reent *r, const char *name);
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static int fsdev_rename(struct _reent *r, const char *oldName, const char *newName);
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static int fsdev_mkdir(struct _reent *r, const char *path, int mode);
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static DIR_ITER* fsdev_diropen(struct _reent *r, DIR_ITER *dirState, const char *path);
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static int fsdev_dirreset(struct _reent *r, DIR_ITER *dirState);
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static int fsdev_dirnext(struct _reent *r, DIR_ITER *dirState, char *filename, struct stat *filestat);
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static int fsdev_dirclose(struct _reent *r, DIR_ITER *dirState);
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static int fsdev_statvfs(struct _reent *r, const char *path, struct statvfs *buf);
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static int fsdev_ftruncate(struct _reent *r, void *fd, off_t len);
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static int fsdev_fsync(struct _reent *r, void *fd);
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static int fsdev_chmod(struct _reent *r, const char *path, mode_t mode);
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static int fsdev_fchmod(struct _reent *r, void *fd, mode_t mode);
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static int fsdev_rmdir(struct _reent *r, const char *name);
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static devoptab_t g_fsdev_devoptab = {
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.structSize = sizeof(FIL),
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.open_r = fsdev_open,
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.close_r = fsdev_close,
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.write_r = fsdev_write,
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.read_r = fsdev_read,
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.seek_r = fsdev_seek,
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.fstat_r = fsdev_fstat,
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.stat_r = fsdev_stat,
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.link_r = fsdev_link,
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.unlink_r = fsdev_unlink,
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.chdir_r = fsdev_chdir,
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.rename_r = fsdev_rename,
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.mkdir_r = fsdev_mkdir,
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.dirStateSize = sizeof(DIR),
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.diropen_r = fsdev_diropen,
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.dirreset_r = fsdev_dirreset,
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.dirnext_r = fsdev_dirnext,
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.dirclose_r = fsdev_dirclose,
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.statvfs_r = fsdev_statvfs,
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.ftruncate_r = fsdev_ftruncate,
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.fsync_r = fsdev_fsync,
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.deviceData = NULL,
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.chmod_r = fsdev_chmod,
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.fchmod_r = fsdev_fchmod,
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.rmdir_r = fsdev_rmdir,
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};
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typedef struct fsdev_device_t {
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devoptab_t devoptab;
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device_partition_t devpart;
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FATFS fatfs;
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char name[32+1];
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bool setup, registered;
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} fsdev_device_t;
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static fsdev_device_t g_fsdev_devices[FF_VOLUMES] = { 0 };
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/* Required by ff.c */
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/* FF_VOLUMES = 10 */
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#define FKNAM "\xff$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$" /* Workaround for fatfs. */
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const char *VolumeStr[FF_VOLUMES] = { FKNAM, FKNAM, FKNAM, FKNAM, FKNAM, FKNAM, FKNAM, FKNAM, FKNAM, FKNAM };
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/* For diskio.c code */
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device_partition_t *g_volume_to_devparts[FF_VOLUMES] = { NULL };
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static fsdev_device_t *fsdev_find_device(const char *name) {
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for (size_t i = 0; i < FF_VOLUMES; i++) {
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if (g_fsdev_devices[i].setup && strcmp(g_fsdev_devices[i].name, name) == 0) {
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return &g_fsdev_devices[i];
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}
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}
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return NULL;
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}
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int fsdev_mount_device(const char *name, const device_partition_t *devpart, bool initialize_immediately) {
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fsdev_device_t *device = fsdev_find_device(name);
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FRESULT rc;
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char drname[40];
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if (device != NULL) {
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errno = EEXIST; /* Device already exists */
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return -1;
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}
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strcpy(drname, name);
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strcat(drname, ":");
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if (name[0] == '\0' || strcmp(name, FKNAM) == 0 || devpart == NULL) {
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errno = EINVAL;
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return -1;
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}
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if (strlen(name) > 32) {
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errno = ENAMETOOLONG;
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return -1;
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}
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/* Find an unused slot. */
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for(size_t i = 0; i < FF_VOLUMES; i++) {
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if (!g_fsdev_devices[i].setup) {
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device = &g_fsdev_devices[i];
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break;
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}
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}
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if (device == NULL) {
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errno = ENOMEM;
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return -1;
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}
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memset(device, 0, sizeof(fsdev_device_t));
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strcpy(device->name, name);
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device->devoptab = g_fsdev_devoptab;
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device->devpart = *devpart;
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device->devoptab.name = device->name;
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device->devoptab.deviceData = device;
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VolumeStr[device - g_fsdev_devices] = device->name;
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g_volume_to_devparts[device - g_fsdev_devices] = &device->devpart;
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rc = f_mount(&device->fatfs, drname, initialize_immediately ? 1 : 0);
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if (rc != FR_OK) {
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g_volume_to_devparts[device - g_fsdev_devices] = NULL;
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VolumeStr[device - g_fsdev_devices] = FKNAM;
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return fsdev_convert_rc(NULL, rc);
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}
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device->setup = true;
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device->registered = false;
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return 0;
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}
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int fsdev_register_device(const char *name) {
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fsdev_device_t *device = fsdev_find_device(name);
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if (device == NULL) {
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errno = ENOENT;
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return -1;
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}
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if (device->registered) {
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/* Do nothing if the device is already registered. */
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return 0;
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}
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if (AddDevice(&device->devoptab) == -1) {
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errno = ENOMEM;
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return -1;
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} else {
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device->registered = true;
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return 0;
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}
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}
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int fsdev_unregister_device(const char *name) {
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fsdev_device_t *device = fsdev_find_device(name);
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char drname[40];
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if (device == NULL) {
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errno = ENOENT;
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return -1;
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}
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if (!device->registered) {
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/* Do nothing if the device is not registered. */
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return 0;
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}
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strcpy(drname, name);
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strcat(drname, ":");
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if (RemoveDevice(drname) == -1) {
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errno = ENOENT;
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return -1;
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} else {
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device->registered = false;
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return 0;
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}
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}
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int fsdev_set_default_device(const char *name) {
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int ret = 0;
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int devid;
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char drname[40];
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strcpy(drname, name);
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strcat(drname, ":");
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devid = FindDevice(drname);
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if (devid == -1 || fsdev_find_device(name) == NULL) {
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errno = ENOENT;
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return -1;
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}
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ret = fsdev_convert_rc(NULL, f_chdrive(drname));
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if (ret == 0) {
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setDefaultDevice(devid);
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}
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return ret;
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}
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int fsdev_is_exfat(const char *name) {
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fsdev_device_t *device = fsdev_find_device(name);
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if (device != NULL) {
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if (device->registered) {
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return ((device->fatfs.fs_type == FS_EXFAT) ? 1 : 0);
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}
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}
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errno = ENOENT;
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return -1;
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}
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int fsdev_unmount_device(const char *name) {
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int ret;
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char drname[40];
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fsdev_device_t *device = fsdev_find_device(name);
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if (device == NULL) {
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errno = ENOENT;
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return -1;
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}
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ret = fsdev_unregister_device(name);
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if (ret == -1) {
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return -1;
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}
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strcpy(drname, name);
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strcat(drname, ":");
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ret = fsdev_convert_rc(NULL, f_unmount(drname));
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if (ret == 0) {
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VolumeStr[device - g_fsdev_devices] = FKNAM;
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g_volume_to_devparts[device - g_fsdev_devices] = NULL;
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device->devpart.finalizer(&device->devpart);
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memset(device, 0, sizeof(fsdev_device_t));
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}
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return ret;
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}
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int fsdev_unmount_all(void) {
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for (size_t i = 0; i < FF_VOLUMES; i++) {
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int ret = fsdev_unmount_device(g_fsdev_devices[i].name);
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if (ret != 0) {
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return ret;
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}
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}
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return 0;
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}
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/* Adapted from https://github.com/benemorius/openOBC-devboard/blob/bf0a4a33e22d24e7c299f921d185da27377310e0/lib/fatfs/FatFS.cpp#L173 */
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static int fsdev_convert_rc(struct _reent *r, FRESULT rc) {
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int errornumber;
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switch(rc) {
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case FR_OK: /* (0) Succeeded */
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errornumber = 0;
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break;
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case FR_DISK_ERR: /* (1) A hard error occurred in the low level disk I/O layer */
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errornumber = EIO;
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break;
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case FR_INT_ERR: /* (2) Assertion failed */
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errornumber = EINVAL;
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break;
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case FR_NOT_READY: /* (3) The physical drive cannot work */
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errornumber = EIO;
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break;
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case FR_NO_FILE: /* (4) Could not find the file */
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errornumber = ENOENT;
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break;
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case FR_NO_PATH: /* (5) Could not find the path */
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errornumber = ENOENT;
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break;
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case FR_INVALID_NAME: /* (6) The path name format is invalid */
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errornumber = EINVAL;
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break;
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case FR_DENIED: /* (7) Access denied due to prohibited access or directory full */
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errornumber = EACCES;
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break;
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case FR_EXIST: /* (8) Access denied due to prohibited access */
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errornumber = EEXIST;
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break;
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case FR_INVALID_OBJECT: /* (9) The file/directory object is invalid */
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errornumber = EFAULT;
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break;
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case FR_WRITE_PROTECTED: /* (10) The physical drive is write protected */
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errornumber = EROFS;
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break;
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case FR_INVALID_DRIVE: /* (11) The logical drive number is invalid */
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errornumber = ENODEV;
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break;
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case FR_NOT_ENABLED: /* (12) The volume has no work area */
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errornumber = ENOEXEC;
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break;
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case FR_NO_FILESYSTEM: /* (13) There is no valid FAT volume */
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errornumber = ENFILE;
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break;
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case FR_MKFS_ABORTED: /* (14) The f_mkfs() aborted due to any parameter error */
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errornumber = ENOEXEC;
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break;
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case FR_TIMEOUT: /* (15) Could not get a grant to access the volume within defined period */
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errornumber = EAGAIN;
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break;
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case FR_LOCKED: /* (16) The operation is rejected according to the file sharing policy */
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errornumber = EBUSY;
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break;
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case FR_NOT_ENOUGH_CORE: /* (17) LFN working buffer could not be allocated */
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errornumber = ENOMEM;
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break;
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case FR_TOO_MANY_OPEN_FILES: /* (18) Number of open files > _FS_SHARE */
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errornumber = EMFILE;
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break;
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case FR_INVALID_PARAMETER: /* (19) Given parameter is invalid */
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errornumber = EINVAL;
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break;
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default:
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errornumber = EPERM;
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break;
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}
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if (r != NULL) {
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r->_errno = errornumber;
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} else {
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errno = errornumber;
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}
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return errornumber == 0 ? 0 : -1;
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}
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static void fsdev_filinfo_to_st(struct stat *st, const FILINFO *info) {
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/* Date of last modification */
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struct tm date;
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memset(st, 0, sizeof(struct stat));
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date.tm_mday = info->fdate & 31;
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date.tm_mon = ((info->fdate >> 5) & 15) - 1;
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date.tm_year = ((info->fdate >> 9) & 127) - 1980 + 1900;
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date.tm_sec = (info->ftime << 1) & 63;
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date.tm_min = (info->ftime >> 5) & 63;
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date.tm_hour = (info->ftime >> 11) & 31;
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date.tm_isdst = 0;
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st->st_atime = st->st_mtime = st->st_ctime = mktime(&date);
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st->st_size = (off_t)info->fsize;
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st->st_nlink = 1;
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if (info->fattrib & AM_DIR) {
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st->st_mode = S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO;
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} else {
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st->st_mode = S_IFREG | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
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}
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st->st_blksize = 512;
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st->st_blocks = st->st_size / st->st_blksize;
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}
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static int fsdev_open(struct _reent *r, void *fileStruct, const char *path, int flags, int mode) {
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(void)mode;
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FIL *f = (FIL *)fileStruct;
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BYTE ff_flags = 0;
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static const struct {
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int posix_flag;
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BYTE ff_flag;
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} flag_mappings[] = {
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{ O_APPEND, FA_OPEN_APPEND },
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{ O_CREAT , FA_OPEN_ALWAYS },
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{ O_EXCL , FA_CREATE_NEW },
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{ O_TRUNC , FA_CREATE_ALWAYS },
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/*{ O_RDONLY, FA_READ }, O_RDONLY is 0*/
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{ O_WRONLY, FA_WRITE },
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{ O_RDWR , FA_READ | FA_WRITE },
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};
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if ((flags & O_RDWR) & (O_RDONLY | O_WRONLY)) {
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r->_errno = EINVAL;
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return -1;
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}
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if ((flags & O_APPEND) && (flags & O_ACCMODE) == O_RDONLY) {
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r->_errno = EINVAL;
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return -1;
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}
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for (size_t i = 0; i < sizeof(flag_mappings)/sizeof(flag_mappings[0]); i++) {
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if (flags & flag_mappings[i].posix_flag) {
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ff_flags |= flag_mappings[i].ff_flag;
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}
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}
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if ((flags & O_ACCMODE) == O_RDONLY) {
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ff_flags |= FA_READ;
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}
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/* Normalize O_CREAT|O_TRUNC */
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if ((ff_flags & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS)) == (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS)) {
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ff_flags &= ~FA_OPEN_ALWAYS;
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}
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return fsdev_convert_rc(r, f_open(f, path, ff_flags));
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}
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static int fsdev_close(struct _reent *r, void *fd) {
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FIL *f = (FIL *)fd;
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return fsdev_convert_rc(r, f_close(f));
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}
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static ssize_t fsdev_write(struct _reent *r, void *fd, const char *ptr, size_t len) {
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FIL *f = (FIL *)fd;
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UINT wr;
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int ret = fsdev_convert_rc(r, f_write(f, ptr, (UINT)len, &wr));
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return ret == -1 ? -1 : (ssize_t)wr;
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}
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static ssize_t fsdev_read(struct _reent *r, void *fd, char *ptr, size_t len) {
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FIL *f = (FIL *)fd;
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UINT rd;
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int ret = fsdev_convert_rc(r, f_read(f, ptr, (UINT)len, &rd));
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return ret == -1 ? -1 : (ssize_t)rd;
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}
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static off_t fsdev_seek(struct _reent *r, void *fd, off_t pos, int whence) {
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FIL *f = (FIL *)fd;
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FSIZE_t off;
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int ret;
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switch (whence) {
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case SEEK_SET:
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|
off = 0;
|
|
break;
|
|
case SEEK_CUR:
|
|
off = f_tell(f);
|
|
break;
|
|
case SEEK_END:
|
|
off = f_size(f);
|
|
break;
|
|
default:
|
|
r->_errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
if ((FSIZE_t)pos < 0 && (FSIZE_t)pos + off < 0) {
|
|
/* don't allow seek to before the beginning of the file */
|
|
r->_errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
ret = fsdev_convert_rc(r, f_lseek(f, off + (FSIZE_t)pos));
|
|
return ret == -1 ? -1 : (off_t)(off + (FSIZE_t)pos);
|
|
}
|
|
|
|
static int fsdev_fstat(struct _reent *r, void *fd, struct stat *st) {
|
|
(void)fd;
|
|
(void)st;
|
|
|
|
r->_errno = ENOSYS;
|
|
return -1;
|
|
}
|
|
|
|
static int fsdev_stat(struct _reent *r, const char *file, struct stat *st) {
|
|
FILINFO info;
|
|
FRESULT rc = f_stat(file, &info);
|
|
|
|
if (rc == FR_OK) {
|
|
fsdev_filinfo_to_st(st, &info);
|
|
return 0;
|
|
}
|
|
|
|
return fsdev_convert_rc(r, rc);
|
|
}
|
|
|
|
static int fsdev_link(struct _reent *r, const char *existing, const char *newLink) {
|
|
(void)existing;
|
|
(void)newLink;
|
|
r->_errno = ENOSYS;
|
|
return -1;
|
|
}
|
|
|
|
static int fsdev_unlink(struct _reent *r, const char *name) {
|
|
return fsdev_convert_rc(r, f_unlink(name));
|
|
}
|
|
|
|
static int fsdev_chdir(struct _reent *r, const char *name) {
|
|
return fsdev_convert_rc(r, f_chdir(name));
|
|
}
|
|
|
|
static int fsdev_rename(struct _reent *r, const char *oldName, const char *newName) {
|
|
return fsdev_convert_rc(r, f_rename(oldName, newName));
|
|
}
|
|
|
|
static int fsdev_mkdir(struct _reent *r, const char *path, int mode) {
|
|
(void)mode;
|
|
return fsdev_convert_rc(r, f_mkdir(path));
|
|
}
|
|
|
|
static DIR_ITER* fsdev_diropen(struct _reent *r, DIR_ITER *dirState, const char *path) {
|
|
DIR *d = (DIR *)(dirState->dirStruct);
|
|
return fsdev_convert_rc(r, f_opendir(d, path)) == -1 ? NULL : dirState;
|
|
}
|
|
|
|
static int fsdev_dirreset(struct _reent *r, DIR_ITER *dirState) {
|
|
(void)dirState;
|
|
r->_errno = ENOSYS;
|
|
return -1;
|
|
}
|
|
|
|
static int fsdev_dirnext(struct _reent *r, DIR_ITER *dirState, char *filename, struct stat *filestat) {
|
|
FILINFO info;
|
|
DIR *d = (DIR *)(dirState->dirStruct);
|
|
FRESULT rc = f_readdir(d, &info);
|
|
|
|
if (rc == FR_OK) {
|
|
fsdev_filinfo_to_st(filestat, &info);
|
|
|
|
if(info.fname[0] == '\0') {
|
|
/* End of directory */
|
|
r->_errno = ENOENT;
|
|
return -1;
|
|
}
|
|
|
|
strcpy(filename, info.fname);
|
|
return 0;
|
|
} else {
|
|
return fsdev_convert_rc(r, rc);
|
|
}
|
|
}
|
|
|
|
static int fsdev_dirclose(struct _reent *r, DIR_ITER *dirState) {
|
|
DIR *d = (DIR *)(dirState->dirStruct);
|
|
return fsdev_convert_rc(r, f_closedir(d));
|
|
}
|
|
|
|
static int fsdev_statvfs(struct _reent *r, const char *path, struct statvfs *buf) {
|
|
(void)path;
|
|
|
|
DWORD nclust;
|
|
FATFS *fatfs;
|
|
FRESULT rc;
|
|
|
|
rc = f_getfree(path, &nclust, &fatfs);
|
|
|
|
if (rc == FR_OK) {
|
|
#if FF_MAX_SS != FF_MIN_SS
|
|
buf->f_bsize = fatfs->ssize;
|
|
#else
|
|
buf->f_bsize = FF_MAX_SS;
|
|
#endif
|
|
buf->f_frsize = buf->f_bsize;
|
|
buf->f_blocks = (fatfs->n_fatent - 2) * fatfs->csize;
|
|
buf->f_bfree = nclust * fatfs->csize;
|
|
buf->f_bavail = buf->f_bfree;
|
|
buf->f_files = 0;
|
|
buf->f_ffree = 0;
|
|
buf->f_favail = 0;
|
|
buf->f_fsid = 0;
|
|
buf->f_flag = ST_NOSUID;
|
|
buf->f_namemax = FF_LFN_BUF;
|
|
|
|
return 0;
|
|
} else {
|
|
return fsdev_convert_rc(r, rc);
|
|
}
|
|
}
|
|
|
|
static int fsdev_ftruncate(struct _reent *r, void *fd, off_t len) {
|
|
FIL *f = (FIL *)fd;
|
|
FSIZE_t off = f_tell(f); /* No need to validate this */
|
|
FRESULT rc = f_lseek(f, (FSIZE_t)len);
|
|
|
|
off = off > (FSIZE_t)len ? (FSIZE_t)len : off;
|
|
if (rc == FR_OK) {
|
|
rc = f_truncate(f);
|
|
/* Ignore errors while attempting restore the position */
|
|
f_lseek(f, off);
|
|
return fsdev_convert_rc(r, rc);
|
|
} else {
|
|
return fsdev_convert_rc(r, rc);
|
|
}
|
|
}
|
|
|
|
static int fsdev_fsync(struct _reent *r, void *fd) {
|
|
FIL *f = (FIL *)fd;
|
|
return fsdev_convert_rc(r, f_sync(f));
|
|
}
|
|
|
|
static int fsdev_chmod(struct _reent *r, const char *path, mode_t mode) {
|
|
(void)path;
|
|
(void)mode;
|
|
r->_errno = ENOSYS;
|
|
return -1;
|
|
}
|
|
|
|
static int fsdev_fchmod(struct _reent *r, void *fd, mode_t mode) {
|
|
(void)fd;
|
|
(void)mode;
|
|
r->_errno = ENOSYS;
|
|
return -1;
|
|
}
|
|
|
|
static int fsdev_rmdir(struct _reent *r, const char *name) {
|
|
return fsdev_convert_rc(r, f_unlink(name));
|
|
}
|