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()
67 		if (sd->s_dentry == dentry)  in configfs_d_iput()
224 			 struct dentry * dentry, void * element,  in configfs_make_dirent()  argument
234 	sd->s_dentry = dentry;  in configfs_make_dirent()
235 	if (dentry)  in configfs_make_dirent()
236 		dentry->d_fsdata = configfs_get(sd);  in configfs_make_dirent()
270 static int configfs_create_dir(struct config_item *item, struct dentry *dentry)  in configfs_create_dir()  argument
274 	struct dentry *p = dentry->d_parent;  in configfs_create_dir()
278 	error = configfs_dirent_exists(p->d_fsdata, dentry->d_name.name);  in configfs_create_dir()
282 	error = configfs_make_dirent(p->d_fsdata, dentry, item, mode,  in configfs_create_dir()
287 	configfs_set_dir_dirent_depth(p->d_fsdata, dentry->d_fsdata);  in configfs_create_dir()
288 	error = configfs_create(dentry, mode, init_dir);  in configfs_create_dir()
291 		item->ci_dentry = dentry;  in configfs_create_dir()
293 		struct configfs_dirent *sd = dentry->d_fsdata;  in configfs_create_dir()
343 			 struct dentry *parent,  in configfs_create_link()
344 			 struct dentry *dentry)  in configfs_create_link()  argument
349 	err = configfs_make_dirent(parent->d_fsdata, dentry, sl, mode,  in configfs_create_link()
352 		err = configfs_create(dentry, mode, init_symlink);  in configfs_create_link()
354 			struct configfs_dirent *sd = dentry->d_fsdata;  in configfs_create_link()
366 static void remove_dir(struct dentry * d)  in remove_dir()
368 	struct dentry * parent = dget(d->d_parent);  in remove_dir()
397 	struct dentry * dentry = dget(item->ci_dentry);  in configfs_remove_dir()  local
399 	if (!dentry)  in configfs_remove_dir()
402 	remove_dir(dentry);  in configfs_remove_dir()
406 	dput(dentry);  in configfs_remove_dir()
413 static int configfs_attach_attr(struct configfs_dirent * sd, struct dentry * dentry)  in configfs_attach_attr()  argument
419 	dentry->d_fsdata = configfs_get(sd);  in configfs_attach_attr()
420 	sd->s_dentry = dentry;  in configfs_attach_attr()
423 	error = configfs_create(dentry, (attr->ca_mode & S_IALLUGO) | S_IFREG,  in configfs_attach_attr()
430 	d_rehash(dentry);  in configfs_attach_attr()
435 static struct dentry * configfs_lookup(struct inode *dir,  in configfs_lookup()
436 				       struct dentry *dentry,  in configfs_lookup()  argument
439 	struct configfs_dirent * parent_sd = dentry->d_parent->d_fsdata;  in configfs_lookup()
460 			if (strcmp(name, dentry->d_name.name))  in configfs_lookup()
464 			err = configfs_attach_attr(sd, dentry);  in configfs_lookup()
474 		if (dentry->d_name.len > NAME_MAX)  in configfs_lookup()
476 		d_add(dentry, NULL);  in configfs_lookup()
492 static int configfs_detach_prep(struct dentry *dentry, struct mutex **wait_mutex)  in configfs_detach_prep()  argument
494 	struct configfs_dirent *parent_sd = dentry->d_fsdata;  in configfs_detach_prep()
539 static void configfs_detach_rollback(struct dentry *dentry)  in configfs_detach_rollback()  argument
541 	struct configfs_dirent *parent_sd = dentry->d_fsdata;  in configfs_detach_rollback()
553 	struct dentry * dentry = dget(item->ci_dentry);  in detach_attrs()  local
557 	if (!dentry)  in detach_attrs()
561 		 dentry->d_name.name);  in detach_attrs()
563 	parent_sd = dentry->d_fsdata;  in detach_attrs()
570 		configfs_drop_dentry(sd, dentry);  in detach_attrs()
577 	dput(dentry);  in detach_attrs()
604 				 struct dentry *dentry);
609 	struct dentry * dentry = dget(group->cg_item.ci_dentry);  in detach_groups()  local
610 	struct dentry *child;  in detach_groups()
614 	if (!dentry)  in detach_groups()
617 	parent_sd = dentry->d_fsdata;  in detach_groups()
640 	dput(dentry);  in detach_groups()
657 	struct dentry *child, *parent = parent_group->cg_item.ci_dentry;  in create_default_group()
806 				struct dentry *dentry)  in configfs_attach_item()  argument
810 	ret = configfs_create_dir(item, dentry);  in configfs_attach_item()
819 			mutex_lock(&d_inode(dentry)->i_mutex);  in configfs_attach_item()
821 			d_inode(dentry)->i_flags |= S_DEAD;  in configfs_attach_item()
822 			dont_mount(dentry);  in configfs_attach_item()
823 			mutex_unlock(&d_inode(dentry)->i_mutex);  in configfs_attach_item()
824 			d_delete(dentry);  in configfs_attach_item()
840 				 struct dentry *dentry)  in configfs_attach_group()  argument
845 	ret = configfs_attach_item(parent_item, item, dentry);  in configfs_attach_group()
847 		sd = dentry->d_fsdata;  in configfs_attach_group()
859 		mutex_lock_nested(&d_inode(dentry)->i_mutex, I_MUTEX_CHILD);  in configfs_attach_group()
864 			d_inode(dentry)->i_flags |= S_DEAD;  in configfs_attach_group()
865 			dont_mount(dentry);  in configfs_attach_group()
868 		mutex_unlock(&d_inode(dentry)->i_mutex);  in configfs_attach_group()
870 			d_delete(dentry);  in configfs_attach_group()
1025 static int configfs_depend_prep(struct dentry *origin,  in configfs_depend_prep()
1061 	struct dentry *root;  in configfs_depend_item()
1153 static int configfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)  in configfs_mkdir()  argument
1166 	sd = dentry->d_parent->d_fsdata;  in configfs_mkdir()
1183 	parent_item = configfs_get_config_item(dentry->d_parent);  in configfs_mkdir()
1210 	name = kmalloc(dentry->d_name.len + 1, GFP_KERNEL);  in configfs_mkdir()
1216 	snprintf(name, dentry->d_name.len + 1, "%s", dentry->d_name.name);  in configfs_mkdir()
1284 		ret = configfs_attach_group(parent_item, item, dentry);  in configfs_mkdir()
1286 		ret = configfs_attach_item(parent_item, item, dentry);  in configfs_mkdir()
1291 		configfs_dir_set_ready(dentry->d_fsdata);  in configfs_mkdir()
1328 static int configfs_rmdir(struct inode *dir, struct dentry *dentry)  in configfs_rmdir()  argument
1337 	sd = dentry->d_fsdata;  in configfs_rmdir()
1342 	parent_item = configfs_get_config_item(dentry->d_parent);  in configfs_rmdir()
1371 			ret = configfs_detach_prep(dentry, &wait_mutex);  in configfs_rmdir()
1373 				configfs_detach_rollback(dentry);  in configfs_rmdir()
1391 	item = configfs_get_config_item(dentry);  in configfs_rmdir()
1443 	struct dentry * new_dentry, * parent;
1452 	parent = item->parent->dentry;
1462 				d_move(item->dentry, new_dentry);
1479 	struct dentry * dentry = file->f_path.dentry;  in configfs_dir_open()  local
1480 	struct configfs_dirent * parent_sd = dentry->d_fsdata;  in configfs_dir_open()
1483 	mutex_lock(&d_inode(dentry)->i_mutex);  in configfs_dir_open()
1496 	mutex_unlock(&d_inode(dentry)->i_mutex);  in configfs_dir_open()
1503 	struct dentry * dentry = file->f_path.dentry;  in configfs_dir_close()  local
1506 	mutex_lock(&d_inode(dentry)->i_mutex);  in configfs_dir_close()
1510 	mutex_unlock(&d_inode(dentry)->i_mutex);  in configfs_dir_close()
1525 	struct dentry *dentry = file->f_path.dentry;  in configfs_readdir()  local
1526 	struct super_block *sb = dentry->d_sb;  in configfs_readdir()
1527 	struct configfs_dirent * parent_sd = dentry->d_fsdata;  in configfs_readdir()
1566 		dentry = next->s_dentry;  in configfs_readdir()
1567 		if (dentry)  in configfs_readdir()
1568 			inode = d_inode(dentry);  in configfs_readdir()
1589 	struct dentry * dentry = file->f_path.dentry;  in configfs_dir_lseek()  local
1591 	mutex_lock(&d_inode(dentry)->i_mutex);  in configfs_dir_lseek()
1599 			mutex_unlock(&d_inode(dentry)->i_mutex);  in configfs_dir_lseek()
1605 			struct configfs_dirent *sd = dentry->d_fsdata;  in configfs_dir_lseek()
1625 	mutex_unlock(&d_inode(dentry)->i_mutex);  in configfs_dir_lseek()
1651 	struct dentry *parent;  in configfs_register_group()
1681 	struct dentry *dentry = group->cg_item.ci_dentry;  in configfs_unregister_group()  local
1682 	struct dentry *parent = group->cg_item.ci_parent->ci_dentry;  in configfs_unregister_group()
1686 	configfs_detach_prep(dentry, NULL);  in configfs_unregister_group()
1690 	d_inode(dentry)->i_flags |= S_DEAD;  in configfs_unregister_group()
1691 	dont_mount(dentry);  in configfs_unregister_group()
1692 	d_delete(dentry);  in configfs_unregister_group()
1695 	dput(dentry);  in configfs_unregister_group()
1751 	struct dentry *dentry;  in configfs_register_subsystem()  local
1752 	struct dentry *root;  in configfs_register_subsystem()
1768 	dentry = d_alloc_name(root, group->cg_item.ci_name);  in configfs_register_subsystem()
1769 	if (dentry) {  in configfs_register_subsystem()
1770 		d_add(dentry, NULL);  in configfs_register_subsystem()
1773 					    dentry);  in configfs_register_subsystem()
1775 			BUG_ON(d_inode(dentry));  in configfs_register_subsystem()
1776 			d_drop(dentry);  in configfs_register_subsystem()
1777 			dput(dentry);  in configfs_register_subsystem()
1780 			configfs_dir_set_ready(dentry->d_fsdata);  in configfs_register_subsystem()
1798 	struct dentry *dentry = group->cg_item.ci_dentry;  in configfs_unregister_subsystem()  local
1799 	struct dentry *root = dentry->d_sb->s_root;  in configfs_unregister_subsystem()
1801 	if (dentry->d_parent != root) {  in configfs_unregister_subsystem()
1808 	mutex_lock_nested(&d_inode(dentry)->i_mutex, I_MUTEX_CHILD);  in configfs_unregister_subsystem()
1811 	if (configfs_detach_prep(dentry, NULL)) {  in configfs_unregister_subsystem()
1817 	d_inode(dentry)->i_flags |= S_DEAD;  in configfs_unregister_subsystem()
1818 	dont_mount(dentry);  in configfs_unregister_subsystem()
1819 	mutex_unlock(&d_inode(dentry)->i_mutex);  in configfs_unregister_subsystem()
1821 	d_delete(dentry);  in configfs_unregister_subsystem()
1825 	dput(dentry);  in configfs_unregister_subsystem()