53 static void configfs_d_iput(struct dentry * dentry,  in configfs_d_iput()  argument
56 	struct configfs_dirent *sd = dentry->d_fsdata;  in configfs_d_iput()
226 			 struct dentry * dentry, void * element,  in configfs_make_dirent()  argument
236 	sd->s_dentry = dentry;  in configfs_make_dirent()
237 	if (dentry)  in configfs_make_dirent()
238 		dentry->d_fsdata = configfs_get(sd);  in configfs_make_dirent()
272 static int configfs_create_dir(struct config_item *item, struct dentry *dentry)  in configfs_create_dir()  argument
276 	struct dentry *p = dentry->d_parent;  in configfs_create_dir()
280 	error = configfs_dirent_exists(p->d_fsdata, dentry->d_name.name);  in configfs_create_dir()
284 	error = configfs_make_dirent(p->d_fsdata, dentry, item, mode,  in configfs_create_dir()
289 	configfs_set_dir_dirent_depth(p->d_fsdata, dentry->d_fsdata);  in configfs_create_dir()
290 	error = configfs_create(dentry, mode, init_dir);  in configfs_create_dir()
293 		item->ci_dentry = dentry;  in configfs_create_dir()
295 		struct configfs_dirent *sd = dentry->d_fsdata;  in configfs_create_dir()
345 			 struct dentry *parent,  in configfs_create_link()
346 			 struct dentry *dentry)  in configfs_create_link()  argument
351 	err = configfs_make_dirent(parent->d_fsdata, dentry, sl, mode,  in configfs_create_link()
354 		err = configfs_create(dentry, mode, init_symlink);  in configfs_create_link()
356 			struct configfs_dirent *sd = dentry->d_fsdata;  in configfs_create_link()
368 static void remove_dir(struct dentry * d)  in remove_dir()
370 	struct dentry * parent = dget(d->d_parent);  in remove_dir()
399 	struct dentry * dentry = dget(item->ci_dentry);  in configfs_remove_dir()  local
401 	if (!dentry)  in configfs_remove_dir()
404 	remove_dir(dentry);  in configfs_remove_dir()
408 	dput(dentry);  in configfs_remove_dir()
415 static int configfs_attach_attr(struct configfs_dirent * sd, struct dentry * dentry)  in configfs_attach_attr()  argument
421 	dentry->d_fsdata = configfs_get(sd);  in configfs_attach_attr()
422 	sd->s_dentry = dentry;  in configfs_attach_attr()
425 	error = configfs_create(dentry, (attr->ca_mode & S_IALLUGO) | S_IFREG,  in configfs_attach_attr()
432 	d_rehash(dentry);  in configfs_attach_attr()
437 static struct dentry * configfs_lookup(struct inode *dir,  in configfs_lookup()
438 				       struct dentry *dentry,  in configfs_lookup()  argument
441 	struct configfs_dirent * parent_sd = dentry->d_parent->d_fsdata;  in configfs_lookup()
462 			if (strcmp(name, dentry->d_name.name))  in configfs_lookup()
466 			err = configfs_attach_attr(sd, dentry);  in configfs_lookup()
476 		if (dentry->d_name.len > NAME_MAX)  in configfs_lookup()
478 		d_add(dentry, NULL);  in configfs_lookup()
494 static int configfs_detach_prep(struct dentry *dentry, struct mutex **wait_mutex)  in configfs_detach_prep()  argument
496 	struct configfs_dirent *parent_sd = dentry->d_fsdata;  in configfs_detach_prep()
541 static void configfs_detach_rollback(struct dentry *dentry)  in configfs_detach_rollback()  argument
543 	struct configfs_dirent *parent_sd = dentry->d_fsdata;  in configfs_detach_rollback()
555 	struct dentry * dentry = dget(item->ci_dentry);  in detach_attrs()  local
559 	if (!dentry)  in detach_attrs()
563 		 dentry->d_name.name);  in detach_attrs()
565 	parent_sd = dentry->d_fsdata;  in detach_attrs()
572 		configfs_drop_dentry(sd, dentry);  in detach_attrs()
579 	dput(dentry);  in detach_attrs()
606 				 struct dentry *dentry);
611 	struct dentry * dentry = dget(group->cg_item.ci_dentry);  in detach_groups()  local
612 	struct dentry *child;  in detach_groups()
616 	if (!dentry)  in detach_groups()
619 	parent_sd = dentry->d_fsdata;  in detach_groups()
642 	dput(dentry);  in detach_groups()
659 	struct dentry *child, *parent = parent_group->cg_item.ci_dentry;  in create_default_group()
808 				struct dentry *dentry)  in configfs_attach_item()  argument
812 	ret = configfs_create_dir(item, dentry);  in configfs_attach_item()
821 			mutex_lock(&d_inode(dentry)->i_mutex);  in configfs_attach_item()
823 			d_inode(dentry)->i_flags |= S_DEAD;  in configfs_attach_item()
824 			dont_mount(dentry);  in configfs_attach_item()
825 			mutex_unlock(&d_inode(dentry)->i_mutex);  in configfs_attach_item()
826 			d_delete(dentry);  in configfs_attach_item()
842 				 struct dentry *dentry)  in configfs_attach_group()  argument
847 	ret = configfs_attach_item(parent_item, item, dentry);  in configfs_attach_group()
849 		sd = dentry->d_fsdata;  in configfs_attach_group()
861 		mutex_lock_nested(&d_inode(dentry)->i_mutex, I_MUTEX_CHILD);  in configfs_attach_group()
866 			d_inode(dentry)->i_flags |= S_DEAD;  in configfs_attach_group()
867 			dont_mount(dentry);  in configfs_attach_group()
870 		mutex_unlock(&d_inode(dentry)->i_mutex);  in configfs_attach_group()
872 			d_delete(dentry);  in configfs_attach_group()
1027 static int configfs_depend_prep(struct dentry *origin,  in configfs_depend_prep()
1063 	struct dentry *root;  in configfs_depend_item()
1155 static int configfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)  in configfs_mkdir()  argument
1168 	sd = dentry->d_parent->d_fsdata;  in configfs_mkdir()
1185 	parent_item = configfs_get_config_item(dentry->d_parent);  in configfs_mkdir()
1212 	name = kmalloc(dentry->d_name.len + 1, GFP_KERNEL);  in configfs_mkdir()
1218 	snprintf(name, dentry->d_name.len + 1, "%s", dentry->d_name.name);  in configfs_mkdir()
1286 		ret = configfs_attach_group(parent_item, item, dentry);  in configfs_mkdir()
1288 		ret = configfs_attach_item(parent_item, item, dentry);  in configfs_mkdir()
1293 		configfs_dir_set_ready(dentry->d_fsdata);  in configfs_mkdir()
1330 static int configfs_rmdir(struct inode *dir, struct dentry *dentry)  in configfs_rmdir()  argument
1339 	sd = dentry->d_fsdata;  in configfs_rmdir()
1344 	parent_item = configfs_get_config_item(dentry->d_parent);  in configfs_rmdir()
1373 			ret = configfs_detach_prep(dentry, &wait_mutex);  in configfs_rmdir()
1375 				configfs_detach_rollback(dentry);  in configfs_rmdir()
1393 	item = configfs_get_config_item(dentry);  in configfs_rmdir()
1445 	struct dentry * new_dentry, * parent;
1454 	parent = item->parent->dentry;
1464 				d_move(item->dentry, new_dentry);
1481 	struct dentry * dentry = file->f_path.dentry;  in configfs_dir_open()  local
1482 	struct configfs_dirent * parent_sd = dentry->d_fsdata;  in configfs_dir_open()
1485 	mutex_lock(&d_inode(dentry)->i_mutex);  in configfs_dir_open()
1498 	mutex_unlock(&d_inode(dentry)->i_mutex);  in configfs_dir_open()
1505 	struct dentry * dentry = file->f_path.dentry;  in configfs_dir_close()  local
1508 	mutex_lock(&d_inode(dentry)->i_mutex);  in configfs_dir_close()
1512 	mutex_unlock(&d_inode(dentry)->i_mutex);  in configfs_dir_close()
1527 	struct dentry *dentry = file->f_path.dentry;  in configfs_readdir()  local
1528 	struct super_block *sb = dentry->d_sb;  in configfs_readdir()
1529 	struct configfs_dirent * parent_sd = dentry->d_fsdata;  in configfs_readdir()
1568 		dentry = next->s_dentry;  in configfs_readdir()
1569 		if (dentry)  in configfs_readdir()
1570 			inode = d_inode(dentry);  in configfs_readdir()
1591 	struct dentry * dentry = file->f_path.dentry;  in configfs_dir_lseek()  local
1593 	mutex_lock(&d_inode(dentry)->i_mutex);  in configfs_dir_lseek()
1601 			mutex_unlock(&d_inode(dentry)->i_mutex);  in configfs_dir_lseek()
1607 			struct configfs_dirent *sd = dentry->d_fsdata;  in configfs_dir_lseek()
1627 	mutex_unlock(&d_inode(dentry)->i_mutex);  in configfs_dir_lseek()
1653 	struct dentry *parent;  in configfs_register_group()
1683 	struct dentry *dentry = group->cg_item.ci_dentry;  in configfs_unregister_group()  local
1684 	struct dentry *parent = group->cg_item.ci_parent->ci_dentry;  in configfs_unregister_group()
1688 	configfs_detach_prep(dentry, NULL);  in configfs_unregister_group()
1692 	d_inode(dentry)->i_flags |= S_DEAD;  in configfs_unregister_group()
1693 	dont_mount(dentry);  in configfs_unregister_group()
1694 	d_delete(dentry);  in configfs_unregister_group()
1697 	dput(dentry);  in configfs_unregister_group()
1753 	struct dentry *dentry;  in configfs_register_subsystem()  local
1754 	struct dentry *root;  in configfs_register_subsystem()
1770 	dentry = d_alloc_name(root, group->cg_item.ci_name);  in configfs_register_subsystem()
1771 	if (dentry) {  in configfs_register_subsystem()
1772 		d_add(dentry, NULL);  in configfs_register_subsystem()
1775 					    dentry);  in configfs_register_subsystem()
1777 			BUG_ON(d_inode(dentry));  in configfs_register_subsystem()
1778 			d_drop(dentry);  in configfs_register_subsystem()
1779 			dput(dentry);  in configfs_register_subsystem()
1782 			configfs_dir_set_ready(dentry->d_fsdata);  in configfs_register_subsystem()
1800 	struct dentry *dentry = group->cg_item.ci_dentry;  in configfs_unregister_subsystem()  local
1801 	struct dentry *root = dentry->d_sb->s_root;  in configfs_unregister_subsystem()
1803 	if (dentry->d_parent != root) {  in configfs_unregister_subsystem()
1810 	mutex_lock_nested(&d_inode(dentry)->i_mutex, I_MUTEX_CHILD);  in configfs_unregister_subsystem()
1813 	if (configfs_detach_prep(dentry, NULL)) {  in configfs_unregister_subsystem()
1819 	d_inode(dentry)->i_flags |= S_DEAD;  in configfs_unregister_subsystem()
1820 	dont_mount(dentry);  in configfs_unregister_subsystem()
1821 	mutex_unlock(&d_inode(dentry)->i_mutex);  in configfs_unregister_subsystem()
1823 	d_delete(dentry);  in configfs_unregister_subsystem()
1827 	dput(dentry);  in configfs_unregister_subsystem()