/**
* Close an openned object.
*
* \param[in] obj object to be closed
* \return U_SUCC or U_FAIL (error code in obj->err).
*/
URET uffs_CloseObject(uffs_Object *obj)
{
#ifdef CONFIG_CHANGE_MODIFY_TIME
uffs_Device *dev;
uffs_Buf *buf;
uffs_FileInfo fi;
#endif
if(obj->dev == NULL || obj->open_succ != U_TRUE) {
obj->err = UEBADF;
goto ext;
}
uffs_ObjectDevLock(obj);
if (obj->oflag & (UO_WRONLY|UO_RDWR|UO_APPEND|UO_CREATE|UO_TRUNC)) {
#ifdef CONFIG_CHANGE_MODIFY_TIME
dev = obj->dev;
if (obj->node) {
//need to change the last modify time stamp
if (obj->type == UFFS_TYPE_DIR)
buf = uffs_BufGetEx(dev, UFFS_TYPE_DIR, obj->node, 0, obj->oflag);
else
buf = uffs_BufGetEx(dev, UFFS_TYPE_FILE, obj->node, 0, obj->oflag);
if(buf == NULL) {
uffs_Perror(UFFS_MSG_SERIOUS, "can't get file header");
do_FlushObject(obj);
uffs_ObjectDevUnLock(obj);
goto ext;
}
uffs_BufRead(dev, buf, &fi, 0, sizeof(uffs_FileInfo));
fi.last_modify = uffs_GetCurDateTime();
uffs_BufWrite(dev, buf, &fi, 0, sizeof(uffs_FileInfo));
uffs_BufPut(dev, buf);
}
#endif
do_FlushObject(obj);
}
uffs_ObjectDevUnLock(obj);
ext:
do_ReleaseObjectResource(obj);
return (obj->err == UENOERR ? U_SUCC : U_FAIL);
}
/**
* Open a UFFS object
*
* \param[in|out] obj the object to be open
* \param[in] name the full name of the object
* \param[in] oflag open flag
*
* \return U_SUCC if object is opened successfully,
* U_FAIL if failed, error code will be set to obj->err.
*/
URET uffs_OpenObject(uffs_Object *obj, const char *name, int oflag)
{
URET ret;
if (obj == NULL)
return U_FAIL;
if ((ret = uffs_ParseObject(obj, name)) == U_SUCC) {
ret = uffs_OpenObjectEx(obj, obj->dev, obj->parent,
obj->name, obj->name_len, oflag);
}
if (ret != U_SUCC)
do_ReleaseObjectResource(obj);
return ret;
}
/**
* \brief delete uffs object
*
* \param[in] name full name of object
* \param[out] err return error code
*
* \return U_SUCC if object is deleted successfully.
* return U_FAIL if error happen, error code is set to *err.
*/
URET uffs_DeleteObject(const char * name, int *err)
{
uffs_Object *obj, *work;
TreeNode *node, *d_node;
uffs_Device *dev = NULL;
u16 block;
u16 serial, parent, last_serial;
UBOOL bad = U_FALSE;
URET ret = U_FAIL;
obj = uffs_GetObject();
if (obj == NULL) {
if (err)
*err = UEMFILE;
goto ext_unlock;
}
if (uffs_OpenObject(obj, name, UO_RDWR|UO_DIR) == U_FAIL) {
if (uffs_OpenObject(obj, name, UO_RDWR) == U_FAIL) {
if (err)
*err = UENOENT;
goto ext_unlock;
}
}
dev = obj->dev;
// working throught object pool see if the object is opened ...
uffs_ObjectDevLock(obj);
work = NULL;
while ((work = (uffs_Object *)uffs_PoolFindNextAllocated(&_object_pool, work)) != NULL) {
if (work != obj &&
work->dev &&
work->dev == obj->dev &&
work->node &&
work->node == obj->node) {
// this object is opened, can't delete it.
if (err)
*err = UEACCES;
goto ext_lock;
}
}
if (obj->type == UFFS_TYPE_DIR) {
// if the dir is not empty, can't delete it.
node = uffs_TreeFindDirNodeWithParent(dev, obj->serial);
if (node != NULL) {
if (err)
*err = UEACCES;
goto ext_lock; //have sub dirs ?
}
node = uffs_TreeFindFileNodeWithParent(dev, obj->serial);
if (node != NULL) {
if (err)
*err = UEACCES;
goto ext_lock; //have sub files ?
}
}
// before erase the block, we need to take care of the buffer ...
uffs_BufFlushAll(dev);
if (_CheckObjBufRef(obj) > 0) {
if (err)
*err = UEACCES;
goto ext_lock;
}
node = obj->node;
// ok, now we are safe to erase DIR/FILE block :-)
block = GET_BLOCK_FROM_NODE(obj);
parent = obj->serial;
last_serial = (obj->type == UFFS_TYPE_FILE && node->u.file.len > 0 ? GetFdnByOfs(obj, node->u.file.len - 1) : 0);
uffs_BreakFromEntry(dev, obj->type, node);
uffs_FlashEraseBlock(dev, block);
node->u.list.block = block;
node->u.list.u.serial = obj->serial;
// From now on, the object is gone physically,
// but we need to 'suspend' this node so that no one will re-use
// the serial number during deleting the reset part of object.
if (HAVE_BADBLOCK(dev)) {
uffs_BadBlockProcessSuspend(dev, node);
bad = U_TRUE; // will be put into 'bad' list later
}
else {
uffs_TreeSuspendAdd(dev, node);
bad = U_FALSE; // will be put into erased list later
}
// now erase DATA blocks
if (obj->type == UFFS_TYPE_FILE && last_serial > 0) {
for (serial = 1; serial <= last_serial; serial++) {
uffs_ObjectDevUnLock(obj);
; // yield CPU to improve responsive when deleting large file.
uffs_ObjectDevLock(obj);
d_node = uffs_TreeFindDataNode(dev, parent, serial);
if (uffs_Assert(d_node != NULL, "Can't find DATA node parent = %d, serial = %d\n", parent, serial)) {
uffs_BreakFromEntry(dev, UFFS_TYPE_DATA, d_node);
block = d_node->u.data.block;
uffs_FlashEraseBlock(dev, block);
d_node->u.list.block = block;
if (HAVE_BADBLOCK(dev))
uffs_BadBlockProcess(dev, d_node);
else
uffs_TreeInsertToErasedListTail(dev, d_node);
}
}
}
// now process the suspend node
uffs_TreeRemoveSuspendNode(dev, node);
if (bad)
uffs_TreeInsertToBadBlockList(dev, node);
else
uffs_TreeInsertToErasedListTail(dev, node);
ret = U_SUCC;
ext_lock:
uffs_ObjectDevUnLock(obj);
ext_unlock:
do_ReleaseObjectResource(obj);
uffs_PutObject(obj);
return ret;
}
/**
* \brief rename(move) file or dir.
* \return U_SUCC if success, otherwise return U_FAIL and set error code to *err.
* \note rename/move file between different mount point is not allowed.
*/
URET uffs_RenameObject(const char *old_name, const char *new_name, int *err)
{
uffs_Object *obj = NULL, *new_obj = NULL;
URET ret = U_FAIL;
int oflag;
obj = uffs_GetObject();
new_obj = uffs_GetObject();
if (obj == NULL || new_obj == NULL) {
if (err)
*err = UEINVAL;
goto ext;
}
oflag = UO_RDONLY;
if (uffs_OpenObject(new_obj, new_name, oflag) == U_SUCC) {
uffs_CloseObject(new_obj);
uffs_Perror(UFFS_MSG_NOISY, "new object already exist!");
if (err)
*err = UEEXIST;
goto ext;
}
oflag |= UO_DIR;
if (uffs_OpenObject(new_obj, new_name, oflag) == U_SUCC) {
uffs_CloseObject(new_obj);
uffs_Perror(UFFS_MSG_NOISY, "new object already exist!");
if (err)
*err = UEEXIST;
goto ext;
}
if (uffs_ParseObject(new_obj, new_name) != U_SUCC) {
uffs_Perror(UFFS_MSG_NOISY, "parse new name fail !");
if (err)
*err = UENOENT;
goto ext;
}
if (new_obj->name_len == 0) {
uffs_Perror(UFFS_MSG_NOISY, "invalid new name");
if (err)
*err = UEINVAL;
goto ext;
}
oflag = UO_RDONLY;
if (uffs_OpenObject(obj, old_name, oflag) != U_SUCC) {
oflag |= UO_DIR;
if (uffs_OpenObject(obj, old_name, oflag) != U_SUCC) {
uffs_Perror(UFFS_MSG_NOISY, "Can't open old object !");
if (err)
*err = UEACCES;
goto ext;
}
}
if (obj->dev != new_obj->dev) {
uffs_Perror(UFFS_MSG_NOISY,
"Can't move object between different mount point");
if (err)
*err = UEACCES;
}
else {
ret = uffs_MoveObjectEx(obj, new_obj->parent,
new_obj->name, new_obj->name_len);
if (ret == U_FAIL && err)
*err = obj->err;
}
uffs_CloseObject(obj);
ext:
if (obj) uffs_PutObject(obj);
if (new_obj) {
do_ReleaseObjectResource(new_obj);
uffs_PutObject(new_obj);
}
return ret;
}
/**
* \brief delete uffs object
*
* \param[in] name full name of object
* \param[out] err return error code
*
* \return U_SUCC if object is deleted successfully.
* return U_FAIL if error happen, error code is set to *err.
*/
URET uffs_DeleteObject(const char * name, int *err)
{
uffs_Object *obj;
TreeNode *node;
uffs_Device *dev;
u16 block;
uffs_Buf *buf;
URET ret = U_FAIL;
obj = uffs_GetObject();
if (obj == NULL) {
if (err)
*err = UEMFILE;
goto err1;
}
if (uffs_OpenObject(obj, name, UO_RDWR|UO_DIR) == U_FAIL) {
if (uffs_OpenObject(obj, name, UO_RDWR) == U_FAIL) {
if (err)
*err = UENOENT;
goto err1;
}
}
uffs_TruncateObject(obj, 0);
uffs_ObjectDevLock(obj);
dev = obj->dev;
if (obj->type == UFFS_TYPE_DIR)
{
// if the dir is not empty, can't delete it.
node = uffs_TreeFindDirNodeWithParent(dev, obj->serial);
if (node != NULL)
{
if (err)
*err = UEACCES;
goto err; //have sub dirs ?
}
node = uffs_TreeFindFileNodeWithParent(dev, obj->serial);
if (node != NULL)
{
if (err)
*err = UEACCES;
goto err; //have sub files ?
}
}
block = GET_BLOCK_FROM_NODE(obj);
node = obj->node;
// before erase the block, we need to take care of the buffer ...
uffs_BufFlushAll(dev);
if (HAVE_BADBLOCK(dev))
uffs_BadBlockRecover(dev);
buf = uffs_BufFind(dev, obj->parent, obj->serial, 0);
if (buf) {
//need to expire this buffer ...
if (buf->ref_count != 0) {
//there is other obj for this file still in use ?
uffs_Perror(UFFS_ERR_NORMAL, "Try to delete object but still have buf referenced.");
if (err)
*err = UEACCES;
goto err;
}
buf->mark = UFFS_BUF_EMPTY; //!< make this buffer expired.
}
//TODO: need to take care of other obj->node ?
uffs_BreakFromEntry(dev, obj->type, node);
uffs_FlashEraseBlock(dev, block);
node->u.list.block = block;
if (HAVE_BADBLOCK(dev))
uffs_BadBlockProcess(dev, node);
else
uffs_TreeInsertToErasedListTail(dev, node);
ret = U_SUCC;
err:
uffs_ObjectDevUnLock(obj);
err1:
do_ReleaseObjectResource(obj);
uffs_PutObject(obj);
return ret;
}
