blob: 675843afa6c5776bec11bc21c4b6bc41d1127dc9 [file] [log] [blame]
/*
* Copyright (c) 2016 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdio.h>
#include <string.h>
#include <kernel.h>
#include <zephyr/types.h>
#include <errno.h>
#include <init.h>
#include <fs.h>
#include <misc/__assert.h>
#include <ff.h>
#define FATFS_MAX_FILE_NAME 12 /* Uses 8.3 SFN */
/* Memory pool for FatFs directory objects */
K_MEM_SLAB_DEFINE(fatfs_dirp_pool, sizeof(DIR),
CONFIG_FS_FATFS_NUM_DIRS, 4);
/* Memory pool for FatFs file objects */
K_MEM_SLAB_DEFINE(fatfs_filep_pool, sizeof(FIL),
CONFIG_FS_FATFS_NUM_FILES, 4);
static int translate_error(int error)
{
switch (error) {
case FR_OK:
return 0;
case FR_NO_FILE:
case FR_NO_PATH:
case FR_INVALID_NAME:
return -ENOENT;
case FR_DENIED:
return -EACCES;
case FR_EXIST:
return -EEXIST;
case FR_INVALID_OBJECT:
return -EBADF;
case FR_WRITE_PROTECTED:
return -EROFS;
case FR_INVALID_DRIVE:
case FR_NOT_ENABLED:
case FR_NO_FILESYSTEM:
return -ENODEV;
case FR_NOT_ENOUGH_CORE:
return -ENOMEM;
case FR_TOO_MANY_OPEN_FILES:
return -EMFILE;
case FR_INVALID_PARAMETER:
return -EINVAL;
case FR_LOCKED:
case FR_TIMEOUT:
case FR_MKFS_ABORTED:
case FR_DISK_ERR:
case FR_INT_ERR:
case FR_NOT_READY:
return -EIO;
}
return -EIO;
}
static int fatfs_open(struct fs_file_t *zfp, const char *file_name)
{
FRESULT res;
u8_t fs_mode;
void *ptr;
if (k_mem_slab_alloc(&fatfs_filep_pool, &ptr, K_NO_WAIT) == 0) {
memset(ptr, 0, sizeof(FIL));
zfp->filep = ptr;
} else {
return -ENOMEM;
}
fs_mode = FA_READ | FA_WRITE | FA_OPEN_ALWAYS;
res = f_open(zfp->filep, &file_name[1], fs_mode);
return translate_error(res);
}
static int fatfs_close(struct fs_file_t *zfp)
{
FRESULT res;
res = f_close(zfp->filep);
/* Free file ptr memory */
k_mem_slab_free(&fatfs_filep_pool, &zfp->filep);
return translate_error(res);
}
static int fatfs_unlink(struct fs_mount_t *mountp, const char *path)
{
FRESULT res;
res = f_unlink(&path[1]);
return translate_error(res);
}
static ssize_t fatfs_read(struct fs_file_t *zfp, void *ptr, size_t size)
{
FRESULT res;
unsigned int br;
res = f_read(zfp->filep, ptr, size, &br);
if (res != FR_OK) {
return translate_error(res);
}
return br;
}
static ssize_t fatfs_write(struct fs_file_t *zfp, const void *ptr, size_t size)
{
FRESULT res;
unsigned int bw;
res = f_write(zfp->filep, ptr, size, &bw);
if (res != FR_OK) {
return translate_error(res);
}
return bw;
}
static int fatfs_seek(struct fs_file_t *zfp, off_t offset, int whence)
{
FRESULT res = FR_OK;
off_t pos;
switch (whence) {
case FS_SEEK_SET:
pos = offset;
break;
case FS_SEEK_CUR:
pos = f_tell((FIL *)zfp->filep) + offset;
break;
case FS_SEEK_END:
pos = f_size((FIL *)zfp->filep) + offset;
break;
default:
return -EINVAL;
}
if ((pos < 0) || (pos > f_size((FIL *)zfp->filep))) {
return -EINVAL;
}
res = f_lseek(zfp->filep, pos);
return translate_error(res);
}
static off_t fatfs_tell(struct fs_file_t *zfp)
{
return f_tell((FIL *)zfp->filep);
}
static int fatfs_truncate(struct fs_file_t *zfp, off_t length)
{
FRESULT res = FR_OK;
off_t cur_length = f_size((FIL *)zfp->filep);
/* f_lseek expands file if new position is larger than file size */
res = f_lseek(zfp->filep, length);
if (res != FR_OK) {
return translate_error(res);
}
if (length < cur_length) {
res = f_truncate(zfp->filep);
} else {
/*
* Get actual length after expansion. This could be
* less if there was not enough space in the volume
* to expand to the requested length
*/
length = f_tell((FIL *)zfp->filep);
res = f_lseek(zfp->filep, cur_length);
if (res != FR_OK) {
return translate_error(res);
}
/*
* The FS module does caching and optimization of
* writes. Here we write 1 byte at a time to avoid
* using additional code and memory for doing any
* optimization.
*/
unsigned int bw;
u8_t c = 0;
for (int i = cur_length; i < length; i++) {
res = f_write(zfp->filep, &c, 1, &bw);
if (res != FR_OK) {
break;
}
}
}
return translate_error(res);
}
static int fatfs_sync(struct fs_file_t *zfp)
{
FRESULT res = FR_OK;
res = f_sync(zfp->filep);
return translate_error(res);
}
static int fatfs_mkdir(struct fs_mount_t *mountp, const char *path)
{
FRESULT res;
res = f_mkdir(&path[1]);
return translate_error(res);
}
static int fatfs_opendir(struct fs_dir_t *zdp, const char *path)
{
FRESULT res;
void *ptr;
if (k_mem_slab_alloc(&fatfs_dirp_pool, &ptr, K_NO_WAIT) == 0) {
memset(ptr, 0, sizeof(DIR));
zdp->dirp = ptr;
} else {
return -ENOMEM;
}
res = f_opendir(zdp->dirp, &path[1]);
return translate_error(res);
}
static int fatfs_readdir(struct fs_dir_t *zdp, struct fs_dirent *entry)
{
FRESULT res;
FILINFO fno;
res = f_readdir(zdp->dirp, &fno);
if (res == FR_OK) {
entry->type = ((fno.fattrib & AM_DIR) ?
FS_DIR_ENTRY_DIR : FS_DIR_ENTRY_FILE);
strcpy(entry->name, fno.fname);
entry->size = fno.fsize;
}
return translate_error(res);
}
static int fatfs_closedir(struct fs_dir_t *zdp)
{
FRESULT res;
res = f_closedir(zdp->dirp);
/* Free file ptr memory */
k_mem_slab_free(&fatfs_dirp_pool, &zdp->dirp);
return translate_error(res);
}
static int fatfs_stat(struct fs_mount_t *mountp,
const char *path, struct fs_dirent *entry)
{
FRESULT res;
FILINFO fno;
res = f_stat(&path[1], &fno);
if (res == FR_OK) {
entry->type = ((fno.fattrib & AM_DIR) ?
FS_DIR_ENTRY_DIR : FS_DIR_ENTRY_FILE);
strcpy(entry->name, fno.fname);
entry->size = fno.fsize;
}
return translate_error(res);
}
static int fatfs_statvfs(struct fs_mount_t *mountp,
const char *path, struct fs_statvfs *stat)
{
FATFS *fs;
FRESULT res;
res = f_getfree(&mountp->mnt_point[1], &stat->f_bfree, &fs);
if (res != FR_OK) {
return -EIO;
}
/*
* _MIN_SS holds the sector size. It is one of the configuration
* constants used by the FS module
*/
stat->f_bsize = _MIN_SS;
stat->f_frsize = fs->csize * stat->f_bsize;
stat->f_blocks = (fs->n_fatent - 2);
return translate_error(res);
}
static int fatfs_mount(struct fs_mount_t *mountp)
{
FRESULT res;
res = f_mount((FATFS *)mountp->fs_data, &mountp->mnt_point[1], 1);
/* If no file system found then create one */
if (res == FR_NO_FILESYSTEM) {
u8_t work[_MAX_SS];
res = f_mkfs(&mountp->mnt_point[1],
(FM_FAT | FM_SFD), 0, work, sizeof(work));
if (res == FR_OK) {
res = f_mount((FATFS *)mountp->fs_data,
&mountp->mnt_point[1], 1);
}
}
__ASSERT((res == FR_OK), "FS init failed (%d)", translate_error(res));
return translate_error(res);
}
/* File system interface */
static struct fs_file_system_t fatfs_fs = {
.open = fatfs_open,
.close = fatfs_close,
.read = fatfs_read,
.write = fatfs_write,
.lseek = fatfs_seek,
.tell = fatfs_tell,
.truncate = fatfs_truncate,
.sync = fatfs_sync,
.opendir = fatfs_opendir,
.readdir = fatfs_readdir,
.closedir = fatfs_closedir,
.mount = fatfs_mount,
.unlink = fatfs_unlink,
.mkdir = fatfs_mkdir,
.stat = fatfs_stat,
.statvfs = fatfs_statvfs,
};
static int fatfs_init(struct device *dev)
{
ARG_UNUSED(dev);
return fs_register(FS_FATFS, &fatfs_fs);
}
SYS_INIT(fatfs_init, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);