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rt-thread-official/components/dfs/filesystems/uffs/dfs_uffs.c

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/*
* File : rtthread.h
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006-2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE.
*
* Change Logs:
* Date Author Notes
* 2011-10-22 prife the first version
* 2012-03-28 prife use mtd device interface
* 2012-04-05 prife update uffs with official repo and use uffs_UnMount/Mount
*/
#include <rtthread.h>
#include <dfs_fs.h>
#include <dfs_def.h>
#include <rtdevice.h>
#include "dfs_uffs.h"
#include "uffs/uffs_fd.h" /* posix file api is here */
#include "uffs/uffs_mtb.h"
#include "uffs/uffs_mem.h"
#include "uffs/uffs_utils.h"
/*
* RT-Thread DFS Interface for uffs
*/
#define UFFS_DEVICE_MAX 2 /* the max partions on a nand deivce*/
#define UFFS_MOUNT_PATH_MAX 128 /* the mount point max length */
#define FILE_PATH_MAX 256 /* the longest file path */
struct _nand_dev
{
struct rt_mtd_nand_device * dev;
struct uffs_StorageAttrSt storage;
uffs_Device uffs_dev;
uffs_MountTable mount_table;
char mount_path[UFFS_MOUNT_PATH_MAX];
void * data; /* when uffs use static buf, it will save ptr here */
};
/* make sure the following struct var had been initilased to 0! */
static struct _nand_dev nand_part[UFFS_DEVICE_MAX] = {0};
static int uffs_result_to_dfs(int result)
{
int status = -1;
result = result < 0 ? -result : result;
switch (result)
{
case UENOERR:/** no error */
break;
case UEACCES:/** Tried to open read-only file for writing, or files sharing mode
does not allow specified operations, or given path is directory */
status = -DFS_STATUS_EINVAL;
break;/* no suitable */
case UEEXIST: /** _O_CREAT and _O_EXCL flags specified, but filename already exists */
status = -DFS_STATUS_EEXIST;
break;
case UEINVAL: /** Invalid oflag or pmode argument */
status = -DFS_STATUS_EINVAL;
break;
case UEMFILE: /** No more file handles available(too many open files) */
status = -1;
break;
case UENOENT: /** file or path not found */
status = -DFS_STATUS_ENOENT;
break;
case UETIME: /** can't set file time */
status = -1;
break;
case UEBADF: /** invalid file handle */
status = -DFS_STATUS_EBADF;
break;
case UENOMEM:/** no enough memory */
status = -DFS_STATUS_ENOSPC;
break;
case UEIOERR: /** I/O error from lower level flash operation */
status = -DFS_STATUS_EIO;
break;
case UENOTDIR: /** Not a directory */
status = -DFS_STATUS_ENOTDIR;
break;
case UEISDIR: /** Is a directory */
status = -DFS_STATUS_EISDIR;
break;
case UEUNKNOWN_ERR:
default:
status = -1;
break; /* unknown error! */
}
return status;
}
static URET _device_init(uffs_Device *dev)
{
dev->attr->_private = NULL; // hook nand_chip data structure to attr->_private
dev->ops = (struct uffs_FlashOpsSt *)&nand_ops;
return U_SUCC;
}
static URET _device_release(uffs_Device *dev)
{
return U_SUCC;
}
static int init_uffs_fs(
struct _nand_dev * nand_part)
{
uffs_MountTable * mtb;
struct rt_mtd_nand_device * nand;
struct uffs_StorageAttrSt * flash_storage;
mtb = &nand_part->mount_table;
nand = nand_part->dev;
flash_storage = &nand_part->storage;
/* setup nand storage attributes */
uffs_setup_storage(flash_storage, nand);
/* register mount table */
if(mtb->dev)
{
/* set memory allocator for uffs */
#if CONFIG_USE_SYSTEM_MEMORY_ALLOCATOR > 0
uffs_MemSetupSystemAllocator(&mtb->dev->mem);
#endif
/* setup device init/release entry */
mtb->dev->Init = _device_init;
mtb->dev->Release = _device_release;
mtb->dev->attr = flash_storage;
uffs_RegisterMountTable(mtb);
}
/* mount uffs partion on nand device */
return uffs_Mount(nand_part->mount_path) == U_SUCC ? 0 : -1;
}
static int dfs_uffs_mount(
struct dfs_filesystem* fs,
unsigned long rwflag,
const void* data)
{
rt_base_t index;
uffs_MountTable * mount_part;
struct rt_mtd_nand_device * dev;
RT_ASSERT(rt_strlen(fs->path) < (UFFS_MOUNT_PATH_MAX-1));
dev = RT_MTD_NAND_DEVICE(fs->dev_id);
/*1. find a empty entry in partition table */
for (index = 0; index < UFFS_DEVICE_MAX ; index ++)
{
if (nand_part[index].dev == RT_NULL)
break;
}
if (index == UFFS_DEVICE_MAX)
return -DFS_STATUS_ENOENT;
/*2. fill partition structure */
nand_part[index].dev = dev;
/* make a right mount path for uffs, end with '/' */
rt_snprintf(nand_part[index].mount_path, UFFS_MOUNT_PATH_MAX, "%s/", fs->path);
if (nand_part[index].mount_path[1] == '/')
nand_part[index].mount_path[1] = 0;
mount_part = &(nand_part[index].mount_table);
mount_part->mount = nand_part[index].mount_path;
mount_part->dev = &(nand_part[index].uffs_dev);
rt_memset(mount_part->dev, 0, sizeof(uffs_Device));//in order to make uffs happy.
mount_part->dev->_private = dev; /* save dev_id into uffs */
mount_part->start_block = dev->block_start;
mount_part->end_block = dev->block_end;
/*3. mount uffs */
if (init_uffs_fs(&nand_part[index]) < 0)
{
return uffs_result_to_dfs(uffs_get_error());
}
return 0;
}
static int dfs_uffs_unmount(struct dfs_filesystem* fs)
{
rt_base_t index;
int result;
/* find the device index and then unmount it */
for (index = 0; index < UFFS_DEVICE_MAX; index++)
{
if (nand_part[index].dev == RT_MTD_NAND_DEVICE(fs->dev_id))
{
nand_part[index].dev = RT_NULL;
result = uffs_UnMount(nand_part[index].mount_path);
if (result != U_SUCC)
break;
result = uffs_UnRegisterMountTable(& nand_part[index].mount_table);
return (result == U_SUCC) ? DFS_STATUS_OK : -1;
}
}
return -DFS_STATUS_ENOENT;
}
static int dfs_uffs_mkfs(const char* device_name)
{
rt_base_t index;
rt_uint32_t block;
struct rt_mtd_nand_device * mtd;
/*1. find the device index */
for (index = 0; index < UFFS_DEVICE_MAX; index++)
{
if (rt_strncmp(nand_part[index].dev->parent.parent.name,
device_name, RT_NAME_MAX) == 0)
break;
}
if (index == UFFS_DEVICE_MAX)
{
/* can't find device driver */
rt_kprintf("can not find device driver: %s\n", device_name);
return -DFS_STATUS_ENOENT;
}
/*2. then unmount the partition */
uffs_Mount(nand_part[index].mount_path);
mtd = nand_part[index].dev;
/*3. erase all blocks on the partition */
block = mtd->block_start;
for (; block <= mtd->block_end; block++)
{
rt_mtd_nand_erase_block(mtd, block);
if (rt_mtd_nand_check_block(mtd, block) != RT_EOK)
{
rt_kprintf("found bad block %d\n", block);
rt_mtd_nand_mark_badblock(mtd, block);
}
}
/*4. remount it */
if (init_uffs_fs(&nand_part[index]) < 0)
{
return uffs_result_to_dfs(uffs_get_error());
}
return DFS_STATUS_OK;
}
static int dfs_uffs_statfs(struct dfs_filesystem* fs,
struct statfs *buf)
{
rt_base_t index;
struct rt_mtd_nand_device * mtd = RT_MTD_NAND_DEVICE(fs->dev_id);
RT_ASSERT(mtd != RT_NULL);
/* find the device index */
for (index = 0; index < UFFS_DEVICE_MAX; index++)
{
if (nand_part[index].dev == (void *)mtd)
break;
}
if (index == UFFS_DEVICE_MAX)
return -DFS_STATUS_ENOENT;
buf->f_bsize = mtd->page_size;
buf->f_blocks = (mtd->block_size)/(mtd->page_size)*
(mtd->block_end - mtd->block_start + 1);
buf->f_bfree = uffs_GetDeviceFree(&nand_part[index].uffs_dev) / mtd->page_size;
return 0;
}
static int dfs_uffs_open(struct dfs_fd* file)
{
int fd;
int oflag, mode;
char * file_path;
oflag = file->flags;
if (oflag & DFS_O_DIRECTORY) /* operations about dir */
{
uffs_DIR * dir;
if (oflag & DFS_O_CREAT) /* create a dir*/
{
if (uffs_mkdir(file->path) < 0)
return uffs_result_to_dfs(uffs_get_error());
}
/* open dir */
file_path = rt_malloc(FILE_PATH_MAX);
if(file_path == RT_NULL)
return -DFS_STATUS_ENOMEM;
if (file->path[0] == '/' && !(file->path[1] == 0))
rt_snprintf(file_path, FILE_PATH_MAX, "%s/", file->path);
else
{
file_path[0] = '/';
file_path[1] = 0;
}
dir = uffs_opendir(file_path);
if (dir == RT_NULL)
{
rt_free(file_path);
return uffs_result_to_dfs(uffs_get_error());
}
/* save this pointer,will used by dfs_uffs_getdents*/
file->data = dir;
rt_free(file_path);
return DFS_STATUS_OK;
}
/* regular file operations */
/* int uffs_open(const char *name, int oflag, ...); what is this?
* uffs_open can open dir!! **/
mode = 0;
if (oflag & DFS_O_RDONLY) mode |= UO_RDONLY;
if (oflag & DFS_O_WRONLY) mode |= UO_WRONLY;
if (oflag & DFS_O_RDWR) mode |= UO_RDWR;
/* Opens the file, if it is existing. If not, a new file is created. */
if (oflag & DFS_O_CREAT) mode |= UO_CREATE;
/* Creates a new file. If the file is existing, it is truncated and overwritten. */
if (oflag & DFS_O_TRUNC) mode |= UO_TRUNC;
/* Creates a new file. The function fails if the file is already existing. */
if (oflag & DFS_O_EXCL) mode |= UO_EXCL;
fd = uffs_open(file->path, mode);
if (fd < 0)
{
return uffs_result_to_dfs(uffs_get_error());
}
/* save this pointer, it will be used when calling read()<29><>write(),
* flush(), seek(), and will be free when calling close()*/
file->data = (void *)fd;
file->pos = uffs_seek(fd, 0, USEEK_CUR);
file->size = uffs_seek(fd, 0, USEEK_END);
uffs_seek(fd, file->pos, USEEK_SET);
if (oflag & DFS_O_APPEND)
{
file->pos = uffs_seek(fd, 0, USEEK_END);
}
return 0;
}
static int dfs_uffs_close(struct dfs_fd* file)
{
int oflag;
int fd;
oflag = file->flags;
if (oflag & DFS_O_DIRECTORY)
{
/* operations about dir */
if (uffs_closedir((uffs_DIR *)(file->data)) < 0)
return uffs_result_to_dfs(uffs_get_error());
return 0;
}
/* regular file operations */
fd = (int)(file->data);
if (uffs_close(fd) == 0)
return 0;
return uffs_result_to_dfs(uffs_get_error());
}
static int dfs_uffs_ioctl(struct dfs_fd * file, int cmd, void* args)
{
return -DFS_STATUS_ENOSYS;
}
static int dfs_uffs_read(struct dfs_fd * file, void* buf, rt_size_t len)
{
int fd;
int char_read;
fd = (int)(file->data);
char_read = uffs_read(fd, buf, len);
if (char_read < 0)
return uffs_result_to_dfs(uffs_get_error());
/* update position */
file->pos = uffs_seek(fd, 0, USEEK_CUR);
return char_read;
}
static int dfs_uffs_write(struct dfs_fd* file,
const void* buf,
rt_size_t len)
{
int fd;
int char_write;
fd = (int)(file->data);
char_write = uffs_write(fd, buf, len);
if (char_write < 0)
return uffs_result_to_dfs(uffs_get_error());
/* update position */
file->pos = uffs_seek(fd, 0, USEEK_CUR);
return char_write;
}
static int dfs_uffs_flush(struct dfs_fd* file)
{
int fd;
int result;
fd = (int)(file->data);
result = uffs_flush(fd);
if (result < 0 )
return uffs_result_to_dfs(uffs_get_error());
return 0;
}
static int dfs_uffs_seek(struct dfs_fd* file,
rt_off_t offset)
{
int fd;
int result;
fd = (int)(file->data);
/* set offset as current offset */
result = uffs_seek(fd, offset, USEEK_SET);
if (result < 0)
return uffs_result_to_dfs(uffs_get_error());
return result;
}
/* return the size of struct dirent*/
static int dfs_uffs_getdents(
struct dfs_fd* file,
struct dirent* dirp,
rt_uint32_t count)
{
rt_uint32_t index;
char * file_path;
struct dirent* d;
uffs_DIR* dir;
struct uffs_dirent * uffs_d;
dir = (uffs_DIR*)(file->data);
RT_ASSERT(dir != RT_NULL);
/* round count, count is always 1 */
count = (count / sizeof(struct dirent)) * sizeof(struct dirent);
if (count == 0) return -DFS_STATUS_EINVAL;
/* allocate file name */
file_path = rt_malloc(FILE_PATH_MAX);
if (file_path == RT_NULL)
return -DFS_STATUS_ENOMEM;
index = 0;
/* usually, the while loop should only be looped only once! */
while (1)
{
struct uffs_stat s;
d = dirp + index;
uffs_d = uffs_readdir(dir);
if (uffs_d == RT_NULL)
{
rt_free(file_path);
return (uffs_result_to_dfs(uffs_get_error()));
}
if (file->path[0] == '/' && !(file->path[1] == 0))
rt_snprintf(file_path, FILE_PATH_MAX, "%s/%s", file->path, uffs_d->d_name);
else
rt_strncpy(file_path, uffs_d->d_name, FILE_PATH_MAX);
uffs_stat(file_path, &s);
switch(s.st_mode & US_IFMT) /* file type mark */
{
case US_IFREG: /* directory */
d->d_type = DFS_DT_REG;
break;
case US_IFDIR: /* regular file */
d->d_type = DFS_DT_DIR;
break;
case US_IFLNK: /* symbolic link */
case US_IREAD: /* read permission */
case US_IWRITE:/* write permission */
default:
d->d_type = DFS_DT_UNKNOWN;
break;
}
/* write the rest args of struct dirent* dirp */
d->d_namlen = rt_strlen(uffs_d->d_name);
d->d_reclen = (rt_uint16_t)sizeof(struct dirent);
rt_strncpy(d->d_name, uffs_d->d_name, rt_strlen(uffs_d->d_name) + 1);
index ++;
if (index * sizeof(struct dirent) >= count)
break;
}
/* free file name buf */
rt_free(file_path);
if (index == 0)
return uffs_result_to_dfs(uffs_get_error());
return index * sizeof(struct dirent);
}
static int dfs_uffs_unlink(struct dfs_filesystem* fs, const char* path)
{
int result;
struct uffs_stat s;
/* judge file type, dir is to be delete by uffs_rmdir, others by uffs_remove */
if (uffs_lstat(path, &s) < 0)
{
return uffs_result_to_dfs(uffs_get_error());
}
switch(s.st_mode & US_IFMT)
{
case US_IFREG:
result = uffs_remove(path);
break;
case US_IFDIR:
result = uffs_rmdir(path);
break;
default:
/* unknown file type */
return -1;
}
if (result < 0)
return uffs_result_to_dfs(uffs_get_error());
return 0;
}
static int dfs_uffs_rename(
struct dfs_filesystem* fs,
const char* oldpath,
const char* newpath)
{
int result;
result = uffs_rename(oldpath, newpath);
if (result < 0)
return uffs_result_to_dfs(uffs_get_error());
return 0;
}
static int dfs_uffs_stat(struct dfs_filesystem* fs, const char *path, struct stat *st)
{
int result;
struct uffs_stat s;
struct rt_mtd_nand_device * mtd;
result = uffs_stat(path, &s);
if (result < 0)
return uffs_result_to_dfs(uffs_get_error());
/* convert uffs stat to dfs stat structure */
/* FIXME, these field may not be the same */
st->st_dev = 0;
st->st_mode = s.st_mode;
st->st_size = s.st_size;
st->st_mtime = s.st_mtime;
mtd = RT_MTD_NAND_DEVICE(fs->dev_id);
st->st_blksize = mtd->page_size;
return 0;
}
static const struct dfs_filesystem_operation dfs_uffs_ops =
{
"uffs", /* file system type: uffs */
#if RTTHREAD_VERSION >= 10100
DFS_FS_FLAG_FULLPATH,
#else
#error "uffs can only work with rtthread whose version should >= 1.01\n"
#endif
dfs_uffs_mount,
dfs_uffs_unmount,
dfs_uffs_mkfs,
dfs_uffs_statfs,
dfs_uffs_open,
dfs_uffs_close,
dfs_uffs_ioctl,
dfs_uffs_read,
dfs_uffs_write,
dfs_uffs_flush,
dfs_uffs_seek,
dfs_uffs_getdents,
dfs_uffs_unlink,
dfs_uffs_stat,
dfs_uffs_rename,
};
int dfs_uffs_init(void)
{
/* register uffs file system */
dfs_register(&dfs_uffs_ops);
if (uffs_InitObjectBuf() == U_SUCC)
{
if (uffs_DirEntryBufInit() == U_SUCC)
{
uffs_InitGlobalFsLock();
return RT_EOK;
}
}
return -RT_ERROR;
}
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