int ubifs_size(const char *filename, loff_t *size)
{
struct ubifs_info *c = ubifs_sb->s_fs_info;
unsigned long inum;
struct inode *inode;
int err = 0;
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
inum = ubifs_findfile(ubifs_sb, (char *)filename);
if (!inum) {
err = -1;
goto out;
}
inode = ubifs_iget(ubifs_sb, inum);
if (IS_ERR(inode)) {
printf("%s: Error reading inode %ld!\n", __func__, inum);
err = PTR_ERR(inode);
goto out;
}
*size = inode->i_size;
ubifs_iput(inode);
out:
ubi_close_volume(c->ubi);
return err;
}
int ubifs_mount(char *name)
{
int flags;
void *data;
struct vfsmount *mnt;
int ret;
struct ubifs_info *c;
/*
* First unmount if allready mounted
*/
if (ubifs_sb)
ubifs_umount(ubifs_sb->s_fs_info);
INIT_LIST_HEAD(&ubifs_infos);
INIT_LIST_HEAD(&ubifs_fs_type.fs_supers);
/*
* Mount in read-only mode
*/
flags = MS_RDONLY;
data = NULL;
mnt = NULL;
ret = ubifs_get_sb(&ubifs_fs_type, flags, name, data, mnt);
if (ret) {
ubifs_err("Error reading superblock on volume '%s' errno=%d!\n", name, ret);
return -1;
}
c = ubifs_sb->s_fs_info;
ubi_close_volume(c->ubi);
return 0;
}
/**
* gluebi_put_device - put MTD device reference.
* @mtd: the MTD device description object
*
* This function is called every time the MTD device is being put. Returns
* zero in case of success and a negative error code in case of failure.
*/
static void gluebi_put_device(struct mtd_info *mtd)
{
struct ubi_volume *vol;
vol = container_of(mtd, struct ubi_volume, gluebi_mtd);
vol->gluebi_refcount -= 1;
ubi_assert(vol->gluebi_refcount >= 0);
if (vol->gluebi_refcount == 0)
ubi_close_volume(vol->gluebi_desc);
}
int ubifs_exists(const char *filename)
{
struct ubifs_info *c = ubifs_sb->s_fs_info;
unsigned long inum;
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
inum = ubifs_findfile(ubifs_sb, (char *)filename);
ubi_close_volume(c->ubi);
return inum != 0;
}
static void ubifs_remove(struct device_d *dev)
{
struct ubifs_priv *priv = dev->priv;
struct super_block *sb = priv->sb;
struct ubifs_info *c = sb->s_fs_info;
ubifs_umount(c);
ubi_close_volume(priv->ubi);
free(c);
free(priv);
}
BAREBOX_CMD_END
static int get_vol_id(u32 ubi_num, const char *name)
{
struct ubi_volume_desc *desc;
struct ubi_volume_info vi;
desc = ubi_open_volume_nm(ubi_num, name, UBI_READONLY);
if(IS_ERR(desc))
return PTR_ERR(desc);
ubi_get_volume_info(desc, &vi);
ubi_close_volume(desc);
return vi.vol_id;
};
int ubifs_ls(char *filename)
{
struct ubifs_info *c = ubifs_sb->s_fs_info;
struct file *file;
struct dentry *dentry;
struct inode *dir;
void *dirent = NULL;
unsigned long inum;
int ret = 0;
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
inum = ubifs_findfile(ubifs_sb, filename);
if (!inum) {
ret = -1;
goto out;
}
file = kzalloc(sizeof(struct file), 0);
dentry = kzalloc(sizeof(struct dentry), 0);
dir = kzalloc(sizeof(struct inode), 0);
if (!file || !dentry || !dir) {
printf("%s: Error, no memory for malloc!\n", __func__);
ret = -ENOMEM;
goto out_mem;
}
dir->i_sb = ubifs_sb;
file->f_path.dentry = dentry;
file->f_path.dentry->d_parent = dentry;
file->f_path.dentry->d_inode = dir;
file->f_path.dentry->d_inode->i_ino = inum;
file->f_pos = 1;
file->private_data = NULL;
ubifs_printdir(file, dirent);
out_mem:
if (file)
free(file);
if (dentry)
free(dentry);
if (dir)
free(dir);
out:
ubi_close_volume(c->ubi);
return ret;
}
static int vol_cdev_release(struct inode *inode, struct file *file)
{
struct ubi_volume_desc *desc = file->private_data;
struct ubi_volume *vol = desc->vol;
dbg_msg("release volume %d, mode %d", vol->vol_id, desc->mode);
if (vol->updating) {
ubi_warn("update of volume %d not finished, volume is damaged",
vol->vol_id);
vol->updating = 0;
kfree(vol->upd_buf);
}
ubi_close_volume(desc);
return 0;
}
int ubifs_filesize(char *filename, u32* size)
{
struct ubifs_info *c = ubifs_sb->s_fs_info;
unsigned long inum=0;
struct inode *inode=NULL;
int err = 0;
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
if (IS_ERR(c->ubi)) {
err = PTR_ERR(c->ubi);
goto out_no_close;
}
inum = ubifs_findfile(ubifs_sb, filename);
if (!inum) {
err = -1;
goto out;
}
/*
* Read file inode
*/
inode = ubifs_iget(ubifs_sb, inum);
if (IS_ERR(inode)) {
printf("%s: Error reading inode %ld!\n", __func__, inum);
err = PTR_ERR(inode);
goto out;
}
/*
* If no size was specified or if size bigger than filesize
* set size to filesize
*/
//if ((size == 0) || (size > inode->i_size))
*size = inode->i_size;
printf("ubifs_filesize %08x \n", *size);
//return 0;
out:
ubi_close_volume(c->ubi);
out_no_close:
return err;
}
static void ubiblk_exit(void)
{
int i;
for (i = 0; i < ndevices; i++) {
struct ubiblk_dev *dev = Devices + i;
if (dev->gd) {
del_gendisk(dev->gd);
put_disk(dev->gd);
}
if (dev->queue) {
blk_cleanup_queue(dev->queue);
}
if (dev->ubi_vol) {
ubi_close_volume(dev->ubi_vol);
}
}
unregister_blkdev(ubiblk_major, "ubiblk");
kfree(Devices);
}
BAREBOX_CMD_END
static int do_ubirmvol(int argc, char *argv[])
{
struct ubi_volume_desc *desc;
uint32_t ubinum;
int fd, ret;
if (argc != 3)
return COMMAND_ERROR_USAGE;
fd = open(argv[1], O_WRONLY);
if (fd < 0) {
perror("open");
return 1;
}
ret = ioctl(fd, UBI_IOCGETUBINUM, &ubinum);
if (ret) {
printf("failed to get ubinum: %s\n", strerror(-ret));
goto err;
}
desc = ubi_open_volume_nm(ubinum, argv[2], UBI_EXCLUSIVE);
if (IS_ERR(desc)) {
ret = PTR_ERR(desc);
printf("failed to open volume %s: %s\n", argv[2], strerror(-ret));
goto err;
}
ret = ubi_api_remove_volume(desc, 0);
if (ret)
printf("failed to remove volume %s: %s\n", argv[2], strerror(-ret));
ubi_close_volume(desc);
err:
close(fd);
return ret ? 1 : 0;
}
static int ubi_cdev_ioctl(struct cdev *cdev, int cmd, void *buf)
{
struct ubi_volume_desc *desc;
struct ubi_device *ubi = cdev->priv;
struct ubi_mkvol_req *req = buf;
switch (cmd) {
case UBI_IOCRMVOL:
desc = ubi_open_volume_nm(ubi->ubi_num, req->name,
UBI_EXCLUSIVE);
if (IS_ERR(desc))
return PTR_ERR(desc);
ubi_remove_volume(desc, 0);
ubi_close_volume(desc);
break;
case UBI_IOCMKVOL:
if (!req->bytes)
req->bytes = (__s64)ubi->avail_pebs * ubi->leb_size;
return ubi_create_volume(ubi, req);
};
return 0;
}
static int ubifs_probe(struct device_d *dev)
{
struct fs_device_d *fsdev = dev_to_fs_device(dev);
struct ubifs_priv *priv = xzalloc(sizeof(struct ubifs_priv));
int ret;
dev->priv = priv;
ret = fsdev_open_cdev(fsdev);
if (ret)
goto err_free;
priv->cdev = fsdev->cdev;
priv->ubi = ubi_open_volume_cdev(priv->cdev, UBI_READONLY);
if (IS_ERR(priv->ubi)) {
dev_err(dev, "failed to open ubi volume: %s\n",
strerrorp(priv->ubi));
ret = PTR_ERR(priv->ubi);
goto err_free;
}
ret = ubifs_get_super(dev, priv->ubi, 0);
if (ret)
goto err;
priv->sb = &fsdev->sb;
ubifs_set_rootarg(priv, fsdev);
return 0;
err:
ubi_close_volume(priv->ubi);
err_free:
free(priv);
return ret;
}
static int vol_cdev_release(struct inode *inode, struct file *file)
{
struct ubi_volume_desc *desc = file->private_data;
struct ubi_volume *vol = desc->vol;
dbg_msg("release volume %d, mode %d", vol->vol_id, desc->mode);
if (vol->updating) {
ubi_warn("update of volume %d not finished, volume is damaged",
vol->vol_id);
ubi_assert(!vol->changing_leb);
vol->updating = 0;
vfree(vol->upd_buf);
} else if (vol->changing_leb) {
dbg_msg("only %lld of %lld bytes received for atomic LEB change"
" for volume %d:%d, cancel", vol->upd_received,
vol->upd_bytes, vol->ubi->ubi_num, vol->vol_id);
vol->changing_leb = 0;
vfree(vol->upd_buf);
}
ubi_close_volume(desc);
return 0;
}
/**
* ubi_open_volume - open UBI volume.
* @ubi_num: UBI device number
* @vol_id: volume ID
* @mode: open mode
*
* The @mode parameter specifies if the volume should be opened in read-only
* mode, read-write mode, or exclusive mode. The exclusive mode guarantees that
* nobody else will be able to open this volume. UBI allows to have many volume
* readers and one writer at a time.
*
* If a static volume is being opened for the first time since boot, it will be
* checked by this function, which means it will be fully read and the CRC
* checksum of each logical eraseblock will be checked.
*
* This function returns volume descriptor in case of success and a negative
* error code in case of failure.
*/
struct ubi_volume_desc *ubi_open_volume(int ubi_num, int vol_id, int mode)
{
int err;
struct ubi_volume_desc *desc;
struct ubi_device *ubi;
struct ubi_volume *vol;
dbg_gen("open device %d, volume %d, mode %d", ubi_num, vol_id, mode);
if (ubi_num < 0 || ubi_num >= UBI_MAX_DEVICES)
return ERR_PTR(-EINVAL);
if (mode != UBI_READONLY && mode != UBI_READWRITE &&
mode != UBI_EXCLUSIVE)
return ERR_PTR(-EINVAL);
/*
* First of all, we have to get the UBI device to prevent its removal.
*/
ubi = ubi_get_device(ubi_num);
if (!ubi)
return ERR_PTR(-ENODEV);
if (vol_id < 0 || vol_id >= ubi->vtbl_slots) {
err = -EINVAL;
goto out_put_ubi;
}
desc = kmalloc(sizeof(struct ubi_volume_desc), GFP_KERNEL);
if (!desc) {
err = -ENOMEM;
goto out_put_ubi;
}
err = -ENODEV;
if (!try_module_get(THIS_MODULE))
goto out_free;
spin_lock(&ubi->volumes_lock);
vol = ubi->volumes[vol_id];
if (!vol)
goto out_unlock;
err = -EBUSY;
switch (mode) {
case UBI_READONLY:
if (vol->exclusive)
goto out_unlock;
vol->readers += 1;
break;
case UBI_READWRITE:
if (vol->exclusive || vol->writers > 0)
goto out_unlock;
vol->writers += 1;
break;
case UBI_EXCLUSIVE:
if (vol->exclusive || vol->writers || vol->readers)
goto out_unlock;
vol->exclusive = 1;
break;
}
get_device(&vol->dev);
vol->ref_count += 1;
spin_unlock(&ubi->volumes_lock);
desc->vol = vol;
desc->mode = mode;
mutex_lock(&ubi->ckvol_mutex);
if (!vol->checked) {
/* This is the first open - check the volume */
err = ubi_check_volume(ubi, vol_id);
if (err < 0) {
mutex_unlock(&ubi->ckvol_mutex);
ubi_close_volume(desc);
return ERR_PTR(err);
}
if (err == 1) {
ubi_warn("volume %d on UBI device %d is corrupted",
vol_id, ubi->ubi_num);
vol->corrupted = 1;
}
vol->checked = 1;
}
mutex_unlock(&ubi->ckvol_mutex);
return desc;
out_unlock:
spin_unlock(&ubi->volumes_lock);
module_put(THIS_MODULE);
out_free:
kfree(desc);
out_put_ubi:
ubi_put_device(ubi);
dbg_err("cannot open device %d, volume %d, error %d",
ubi_num, vol_id, err);
return ERR_PTR(err);
}
int ubifs_read(const char *filename, void *buf, loff_t offset,
loff_t size, loff_t *actread)
{
struct ubifs_info *c = ubifs_sb->s_fs_info;
unsigned long inum;
struct inode *inode;
struct page page;
int err = 0;
int i;
int count;
int last_block_size = 0;
*actread = 0;
if (offset & (PAGE_SIZE - 1)) {
printf("ubifs: Error offset must be a multple of %d\n",
PAGE_SIZE);
return -1;
}
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
/* ubifs_findfile will resolve symlinks, so we know that we get
* the real file here */
inum = ubifs_findfile(ubifs_sb, (char *)filename);
if (!inum) {
err = -1;
goto out;
}
/*
* Read file inode
*/
inode = ubifs_iget(ubifs_sb, inum);
if (IS_ERR(inode)) {
printf("%s: Error reading inode %ld!\n", __func__, inum);
err = PTR_ERR(inode);
goto out;
}
if (offset > inode->i_size) {
printf("ubifs: Error offset (%lld) > file-size (%lld)\n",
offset, size);
err = -1;
goto put_inode;
}
/*
* If no size was specified or if size bigger than filesize
* set size to filesize
*/
if ((size == 0) || (size > (inode->i_size - offset)))
size = inode->i_size - offset;
count = (size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT;
page.addr = buf;
page.index = offset / PAGE_SIZE;
page.inode = inode;
for (i = 0; i < count; i++) {
/*
* Make sure to not read beyond the requested size
*/
if (((i + 1) == count) && (size < inode->i_size))
last_block_size = size - (i * PAGE_SIZE);
err = do_readpage(c, inode, &page, last_block_size);
if (err)
break;
page.addr += PAGE_SIZE;
page.index++;
}
if (err) {
printf("Error reading file '%s'\n", filename);
*actread = i * PAGE_SIZE;
} else {
*actread = size;
}
put_inode:
ubifs_iput(inode);
out:
ubi_close_volume(c->ubi);
return err;
}
int ubifs_load(char *filename, u32 addr, u32 size)
{
struct ubifs_info *c = ubifs_sb->s_fs_info;
unsigned long inum;
struct inode *inode;
struct page page;
int err = 0;
int i;
int count;
int last_block_size = 0;
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
/* ubifs_findfile will resolve symlinks, so we know that we get
* the real file here */
inum = ubifs_findfile(ubifs_sb, filename);
if (!inum) {
err = -1;
goto out;
}
/*
* Read file inode
*/
inode = ubifs_iget(ubifs_sb, inum);
if (IS_ERR(inode)) {
printf("%s: Error reading inode %ld!\n", __func__, inum);
err = PTR_ERR(inode);
goto out;
}
/*
* If no size was specified or if size bigger than filesize
* set size to filesize
*/
if ((size == 0) || (size > inode->i_size))
size = inode->i_size;
count = (size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT;
printf("Loading file '%s' to addr 0x%08x with size %d (0x%08x)...\n",
filename, addr, size, size);
page.addr = (void *)addr;
page.index = 0;
page.inode = inode;
for (i = 0; i < count; i++) {
/*
* Make sure to not read beyond the requested size
*/
if ((i + 1) == count)
last_block_size = size - (i * PAGE_SIZE);
err = do_readpage(c, inode, &page, last_block_size);
if (err)
break;
page.addr += PAGE_SIZE;
page.index++;
}
if (err)
printf("Error reading file '%s'\n", filename);
else
printf("Done\n");
ubifs_iput(inode);
out:
ubi_close_volume(c->ubi);
return err;
}
static int ubi_cdev_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
int err = 0;
struct ubi_device *ubi;
struct ubi_volume_desc *desc;
void __user *argp = (void __user *)arg;
if (_IOC_NR(cmd) > UBI_CDEV_IOC_MAX_SEQ ||
_IOC_TYPE(cmd) != UBI_IOC_MAGIC)
return -ENOTTY;
if (_IOC_DIR(cmd) && _IOC_READ)
err = !access_ok(VERIFY_WRITE, argp, _IOC_SIZE(cmd));
else if (_IOC_DIR(cmd) && _IOC_WRITE)
err = !access_ok(VERIFY_READ, argp, _IOC_SIZE(cmd));
if (err)
return -EFAULT;
if (!capable(CAP_SYS_RESOURCE))
return -EPERM;
ubi = major_to_device(imajor(inode));
if (IS_ERR(ubi))
return PTR_ERR(ubi);
switch (cmd) {
/* Create volume command */
case UBI_IOCMKVOL:
{
struct ubi_mkvol_req req;
dbg_msg("create volume");
err = __copy_from_user(&req, argp,
sizeof(struct ubi_mkvol_req));
if (err) {
err = -EFAULT;
break;
}
err = verify_mkvol_req(ubi, &req);
if (err)
break;
req.name[req.name_len] = '\0';
err = ubi_create_volume(ubi, &req);
if (err)
break;
err = __put_user(req.vol_id, (__user int32_t *)argp);
if (err)
err = -EFAULT;
break;
}
/* Remove volume command */
case UBI_IOCRMVOL:
{
int vol_id;
dbg_msg("remove volume");
err = __get_user(vol_id, (__user int32_t *)argp);
if (err) {
err = -EFAULT;
break;
}
desc = ubi_open_volume(ubi->ubi_num, vol_id, UBI_EXCLUSIVE);
if (IS_ERR(desc)) {
err = PTR_ERR(desc);
break;
}
err = ubi_remove_volume(desc);
if (err)
ubi_close_volume(desc);
break;
}
/* Re-size volume command */
case UBI_IOCRSVOL:
{
int pebs;
uint64_t tmp;
struct ubi_rsvol_req req;
dbg_msg("re-size volume");
err = __copy_from_user(&req, argp,
sizeof(struct ubi_rsvol_req));
if (err) {
err = -EFAULT;
break;
}
err = verify_rsvol_req(ubi, &req);
if (err)
break;
desc = ubi_open_volume(ubi->ubi_num, req.vol_id, UBI_EXCLUSIVE);
if (IS_ERR(desc)) {
err = PTR_ERR(desc);
break;
}
tmp = req.bytes;
pebs = !!do_div(tmp, desc->vol->usable_leb_size);
pebs += tmp;
err = ubi_resize_volume(desc, pebs);
ubi_close_volume(desc);
break;
}
default:
err = -ENOTTY;
break;
}
return err;
}
static int ubi_cdev_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
int err = 0;
struct ubi_device *ubi;
struct ubi_volume_desc *desc;
void __user *argp = (void __user *)arg;
if (!capable(CAP_SYS_RESOURCE))
return -EPERM;
ubi = ubi_get_by_major(imajor(inode));
if (!ubi)
return -ENODEV;
switch (cmd) {
/* Create volume command */
case UBI_IOCMKVOL:
{
struct ubi_mkvol_req req;
dbg_msg("create volume");
err = copy_from_user(&req, argp, sizeof(struct ubi_mkvol_req));
if (err) {
err = -EFAULT;
break;
}
err = verify_mkvol_req(ubi, &req);
if (err)
break;
req.name[req.name_len] = '\0';
mutex_lock(&ubi->volumes_mutex);
err = ubi_create_volume(ubi, &req);
mutex_unlock(&ubi->volumes_mutex);
if (err)
break;
err = put_user(req.vol_id, (__user int32_t *)argp);
if (err)
err = -EFAULT;
break;
}
/* Remove volume command */
case UBI_IOCRMVOL:
{
int vol_id;
dbg_msg("remove volume");
err = get_user(vol_id, (__user int32_t *)argp);
if (err) {
err = -EFAULT;
break;
}
desc = ubi_open_volume(ubi->ubi_num, vol_id, UBI_EXCLUSIVE);
if (IS_ERR(desc)) {
err = PTR_ERR(desc);
break;
}
mutex_lock(&ubi->volumes_mutex);
err = ubi_remove_volume(desc);
mutex_unlock(&ubi->volumes_mutex);
/*
* The volume is deleted (unless an error occurred), and the
* 'struct ubi_volume' object will be freed when
* 'ubi_close_volume()' will call 'put_device()'.
*/
ubi_close_volume(desc);
break;
}
/* Re-size volume command */
case UBI_IOCRSVOL:
{
int pebs;
uint64_t tmp;
struct ubi_rsvol_req req;
dbg_msg("re-size volume");
err = copy_from_user(&req, argp, sizeof(struct ubi_rsvol_req));
if (err) {
err = -EFAULT;
break;
}
err = verify_rsvol_req(ubi, &req);
if (err)
break;
desc = ubi_open_volume(ubi->ubi_num, req.vol_id, UBI_EXCLUSIVE);
if (IS_ERR(desc)) {
err = PTR_ERR(desc);
break;
}
tmp = req.bytes;
pebs = !!do_div(tmp, desc->vol->usable_leb_size);
pebs += tmp;
mutex_lock(&ubi->volumes_mutex);
err = ubi_resize_volume(desc, pebs);
mutex_unlock(&ubi->volumes_mutex);
ubi_close_volume(desc);
break;
}
default:
err = -ENOTTY;
break;
}
ubi_put_device(ubi);
return err;
}
int ubifs_load(char *filename, u32 addr, u32 size)
{
struct ubifs_info *c = ubifs_sb->s_fs_info;
unsigned long inum;
struct inode *inode;
struct page page;
int err = 0;
int i;
int count;
char link_name[64];
struct ubifs_inode *ui;
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
inum = ubifs_findfile(ubifs_sb, filename);
if (!inum) {
err = -1;
goto out;
}
/*
* Read file inode
*/
inode = ubifs_iget(ubifs_sb, inum);
if (IS_ERR(inode)) {
printf("%s: Error reading inode %ld!\n", __func__, inum);
err = PTR_ERR(inode);
goto out;
}
/*
* Check for symbolic link
*/
ui = ubifs_inode(inode);
if (((inode->i_mode & S_IFMT) == S_IFLNK) && ui->data_len) {
memcpy(link_name, ui->data, ui->data_len);
printf("%s is linked to %s!\n", filename, link_name);
ubifs_iput(inode);
/*
* Now we have the "real" filename, call ubifs_load()
* again (recursive call) to load this file instead
*/
return ubifs_load(link_name, addr, size);
}
/*
* If no size was specified or if size bigger than filesize
* set size to filesize
*/
if ((size == 0) || (size > inode->i_size))
size = inode->i_size;
count = (size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT;
printf("Loading file '%s' to addr 0x%08x with size %d (0x%08x)...\n",
filename, addr, size, size);
page.addr = (void *)addr;
page.index = 0;
page.inode = inode;
for (i = 0; i < count; i++) {
err = do_readpage(c, inode, &page);
if (err)
break;
page.addr += PAGE_SIZE;
page.index++;
}
if (err)
printf("Error reading file '%s'\n", filename);
else
printf("Done\n");
ubifs_iput(inode);
out:
ubi_close_volume(c->ubi);
return err;
}
static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
{
struct ubi_volume_desc *ubi = sb->s_fs_info;
struct ubifs_info *c;
struct inode *root;
int err;
c = kzalloc(sizeof(struct ubifs_info), GFP_KERNEL);
if (!c)
return -ENOMEM;
spin_lock_init(&c->cnt_lock);
spin_lock_init(&c->cs_lock);
spin_lock_init(&c->buds_lock);
spin_lock_init(&c->space_lock);
spin_lock_init(&c->orphan_lock);
init_rwsem(&c->commit_sem);
mutex_init(&c->lp_mutex);
mutex_init(&c->tnc_mutex);
mutex_init(&c->log_mutex);
mutex_init(&c->mst_mutex);
mutex_init(&c->umount_mutex);
init_waitqueue_head(&c->cmt_wq);
c->buds = RB_ROOT;
c->old_idx = RB_ROOT;
c->size_tree = RB_ROOT;
c->orph_tree = RB_ROOT;
INIT_LIST_HEAD(&c->infos_list);
INIT_LIST_HEAD(&c->idx_gc);
INIT_LIST_HEAD(&c->replay_list);
INIT_LIST_HEAD(&c->replay_buds);
INIT_LIST_HEAD(&c->uncat_list);
INIT_LIST_HEAD(&c->empty_list);
INIT_LIST_HEAD(&c->freeable_list);
INIT_LIST_HEAD(&c->frdi_idx_list);
INIT_LIST_HEAD(&c->unclean_leb_list);
INIT_LIST_HEAD(&c->old_buds);
INIT_LIST_HEAD(&c->orph_list);
INIT_LIST_HEAD(&c->orph_new);
c->highest_inum = UBIFS_FIRST_INO;
c->lhead_lnum = c->ltail_lnum = UBIFS_LOG_LNUM;
ubi_get_volume_info(ubi, &c->vi);
ubi_get_device_info(c->vi.ubi_num, &c->di);
/* Re-open the UBI device in read-write mode */
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
if (IS_ERR(c->ubi)) {
err = PTR_ERR(c->ubi);
goto out_free;
}
c->vfs_sb = sb;
sb->s_fs_info = c;
sb->s_magic = UBIFS_SUPER_MAGIC;
sb->s_blocksize = UBIFS_BLOCK_SIZE;
sb->s_blocksize_bits = UBIFS_BLOCK_SHIFT;
sb->s_dev = c->vi.cdev;
sb->s_maxbytes = c->max_inode_sz = key_max_inode_size(c);
if (c->max_inode_sz > MAX_LFS_FILESIZE)
sb->s_maxbytes = c->max_inode_sz = MAX_LFS_FILESIZE;
if (c->rw_incompat) {
ubifs_err("the file-system is not R/W-compatible");
ubifs_msg("on-flash format version is w%d/r%d, but software "
"only supports up to version w%d/r%d", c->fmt_version,
c->ro_compat_version, UBIFS_FORMAT_VERSION,
UBIFS_RO_COMPAT_VERSION);
return -EROFS;
}
mutex_lock(&c->umount_mutex);
err = mount_ubifs(c);
if (err) {
ubifs_assert(err < 0);
goto out_unlock;
}
/* Read the root inode */
root = ubifs_iget(sb, UBIFS_ROOT_INO);
if (IS_ERR(root)) {
err = PTR_ERR(root);
goto out_umount;
}
sb->s_root = NULL;
mutex_unlock(&c->umount_mutex);
return 0;
out_umount:
ubifs_umount(c);
out_unlock:
mutex_unlock(&c->umount_mutex);
ubi_close_volume(c->ubi);
out_free:
kfree(c);
return err;
}
int ubifs_part_load(char *filename, u32 addr, u32 offset, u32 size)
{
struct ubifs_info *c = ubifs_sb->s_fs_info;
unsigned long inum=0;
struct inode *inode=NULL;
struct page page;
int err = 0;
int i=0;
int count=0;
int last_block_size = 0;
char link_name[64];
struct ubifs_inode *ui=NULL;
if(offset % PAGE_SIZE != 0)
{
printf("%s: offset(0x%x) should align to page size(0x%x), at %d\n", __func__, offset, PAGE_SIZE, __LINE__);
return 1;
}
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY);
if (IS_ERR(c->ubi)) {
err = PTR_ERR(c->ubi);
goto out_no_close;
}
inum = ubifs_findfile(ubifs_sb, filename);
if (!inum) {
err = -1;
goto out;
}
/*
* Read file inode
*/
inode = ubifs_iget(ubifs_sb, inum);
if (IS_ERR(inode)) {
printf("%s: Error reading inode %ld!\n", __func__, inum);
err = PTR_ERR(inode);
goto out;
}
/*
* Check for symbolic link
*/
ui = ubifs_inode(inode);
if (((inode->i_mode & S_IFMT) == S_IFLNK) && ui->data_len) {
memcpy(link_name, ui->data, ui->data_len);
link_name[ui->data_len] = '\0';
printf("%s is linked to %s!\n", filename, link_name);
ubifs_iput(inode);
/*
* Now we have the "real" filename, call ubifs_load()
* again (recursive call) to load this file instead
*/
return ubifs_part_load(link_name, addr, offset, size);
}
/*
* If no size was specified or if size bigger than filesize
* set size to filesize
*/
if ((size == 0) || (size > inode->i_size))
size = inode->i_size;
count = (size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT;
printf("Loading file '%s' to addr 0x%08x with size %d (0x%08x)...\n",
filename, addr, size, size);
page.addr = (void *)addr;
page.index = (offset / PAGE_SIZE);
page.inode = inode;
//offset
for (i = 0; i < count; i++) {
/*
* Make sure to not read beyond the requested size
*/
if (((i + 1) == count) && (size < inode->i_size))
last_block_size = size - (i * PAGE_SIZE);
err = do_readpage(c, inode, &page, last_block_size);
if (err)
break;
page.addr += PAGE_SIZE;
page.index++;
}
if (err)
printf("Error reading file '%s'\n", filename);
else
printf("Done\n");
ubifs_iput(inode);
out:
ubi_close_volume(c->ubi);
out_no_close:
return err;
}
static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
const char *name, void *data, struct vfsmount *mnt)
{
struct ubi_volume_desc *ubi;
struct ubi_volume_info vi;
struct super_block *sb;
int err;
dbg_gen("name %s, flags %#x", name, flags);
/*
* Get UBI device number and volume ID. Mount it read-only so far
* because this might be a new mount point, and UBI allows only one
* read-write user at a time.
*/
ubi = open_ubi(name, UBI_READONLY);
if (IS_ERR(ubi)) {
ubifs_err("cannot open \"%s\", error %d",
name, (int)PTR_ERR(ubi));
return PTR_ERR(ubi);
}
ubi_get_volume_info(ubi, &vi);
dbg_gen("opened ubi%d_%d", vi.ubi_num, vi.vol_id);
sb = sget(fs_type, &sb_test, &sb_set, &vi.cdev);
if (IS_ERR(sb)) {
err = PTR_ERR(sb);
goto out_close;
}
if (sb->s_root) {
/* A new mount point for already mounted UBIFS */
dbg_gen("this ubi volume is already mounted");
if ((flags ^ sb->s_flags) & MS_RDONLY) {
err = -EBUSY;
goto out_deact;
}
} else {
sb->s_flags = flags;
/*
* Pass 'ubi' to 'fill_super()' in sb->s_fs_info where it is
* replaced by 'c'.
*/
sb->s_fs_info = ubi;
err = ubifs_fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
if (err)
goto out_deact;
/* We do not support atime */
sb->s_flags |= MS_ACTIVE | MS_NOATIME;
}
/* 'fill_super()' opens ubi again so we must close it here */
ubi_close_volume(ubi);
ubifs_sb = sb;
return 0;
out_deact:
up_write(&sb->s_umount);
out_close:
ubi_close_volume(ubi);
return err;
}
/**
* ubi_open_volume - open UBI volume.
* @ubi_num: UBI device number
* @vol_id: volume ID
* @mode: open mode
*
* The @mode parameter specifies if the volume should be opened in read-only
* mode, read-write mode, or exclusive mode. The exclusive mode guarantees that
* nobody else will be able to open this volume. UBI allows to have many volume
* readers and one writer at a time.
*
* If a static volume is being opened for the first time since boot, it will be
* checked by this function, which means it will be fully read and the CRC
* checksum of each logical eraseblock will be checked.
*
* This function returns volume descriptor in case of success and a negative
* error code in case of failure.
*/
struct ubi_volume_desc *ubi_open_volume(int ubi_num, int vol_id, int mode)
{
int err;
struct ubi_volume_desc *desc;
struct ubi_device *ubi = ubi_devices[ubi_num];
struct ubi_volume *vol;
dbg_msg("open device %d volume %d, mode %d", ubi_num, vol_id, mode);
err = -ENODEV;
if (!try_module_get(THIS_MODULE))
return ERR_PTR(err);
if (ubi_num < 0 || ubi_num >= UBI_MAX_DEVICES || !ubi)
goto out_put;
err = -EINVAL;
if (vol_id < 0 || vol_id >= ubi->vtbl_slots)
goto out_put;
if (mode != UBI_READONLY && mode != UBI_READWRITE &&
mode != UBI_EXCLUSIVE)
goto out_put;
desc = kmalloc(sizeof(struct ubi_volume_desc), GFP_KERNEL);
if (!desc) {
err = -ENOMEM;
goto out_put;
}
spin_lock(&ubi->volumes_lock);
vol = ubi->volumes[vol_id];
if (!vol) {
err = -ENODEV;
goto out_unlock;
}
err = -EBUSY;
switch (mode) {
case UBI_READONLY:
if (vol->exclusive)
goto out_unlock;
vol->readers += 1;
break;
case UBI_READWRITE:
if (vol->exclusive || vol->writers > 0)
goto out_unlock;
vol->writers += 1;
break;
case UBI_EXCLUSIVE:
if (vol->exclusive || vol->writers || vol->readers)
goto out_unlock;
vol->exclusive = 1;
break;
}
spin_unlock(&ubi->volumes_lock);
desc->vol = vol;
desc->mode = mode;
/*
* To prevent simultaneous checks of the same volume we use @vtbl_mutex,
* although it is not the purpose it was introduced for.
*/
mutex_lock(&ubi->vtbl_mutex);
if (!vol->checked) {
/* This is the first open - check the volume */
err = ubi_check_volume(ubi, vol_id);
if (err < 0) {
mutex_unlock(&ubi->vtbl_mutex);
ubi_close_volume(desc);
return ERR_PTR(err);
}
if (err == 1) {
ubi_warn("volume %d on UBI device %d is corrupted",
vol_id, ubi->ubi_num);
vol->corrupted = 1;
}
vol->checked = 1;
}
mutex_unlock(&ubi->vtbl_mutex);
return desc;
out_unlock:
spin_unlock(&ubi->volumes_lock);
kfree(desc);
out_put:
module_put(THIS_MODULE);
return ERR_PTR(err);
}
