45 static void configfs_d_iput(struct dentry * dentry,  in configfs_d_iput()  argument
48 	struct configfs_dirent *sd = dentry->d_fsdata;  in configfs_d_iput()
59 		if (sd->s_dentry == dentry)  in configfs_d_iput()
232 static int configfs_dirent_exists(struct dentry *dentry)  in configfs_dirent_exists()  argument
234 	struct configfs_dirent *parent_sd = dentry->d_parent->d_fsdata;  in configfs_dirent_exists()
235 	const unsigned char *new = dentry->d_name.name;  in configfs_dirent_exists()
253 			 struct dentry * dentry, void * element,  in configfs_make_dirent()  argument
263 	sd->s_dentry = dentry;  in configfs_make_dirent()
264 	if (dentry)  in configfs_make_dirent()
265 		dentry->d_fsdata = configfs_get(sd);  in configfs_make_dirent()
270 static void configfs_remove_dirent(struct dentry *dentry)  in configfs_remove_dirent()  argument
272 	struct configfs_dirent *sd = dentry->d_fsdata;  in configfs_remove_dirent()
292 static int configfs_create_dir(struct config_item *item, struct dentry *dentry,  in configfs_create_dir()  argument
297 	struct dentry *p = dentry->d_parent;  in configfs_create_dir()
302 	error = configfs_make_dirent(p->d_fsdata, dentry, item, mode,  in configfs_create_dir()
308 	configfs_set_dir_dirent_depth(p->d_fsdata, dentry->d_fsdata);  in configfs_create_dir()
309 	inode = configfs_create(dentry, mode);  in configfs_create_dir()
317 	d_instantiate(dentry, inode);  in configfs_create_dir()
319 	dget(dentry);  /* pin directory dentries in core */  in configfs_create_dir()
321 	item->ci_dentry = dentry;  in configfs_create_dir()
325 	configfs_put(dentry->d_fsdata);  in configfs_create_dir()
326 	configfs_remove_dirent(dentry);  in configfs_create_dir()
368 int configfs_create_link(struct configfs_dirent *target, struct dentry *parent,  in configfs_create_link()
369 		struct dentry *dentry, char *body)  in configfs_create_link()  argument
376 	err = configfs_make_dirent(p, dentry, target, mode, CONFIGFS_ITEM_LINK,  in configfs_create_link()
381 	inode = configfs_create(dentry, mode);  in configfs_create_link()
387 	d_instantiate(dentry, inode);  in configfs_create_link()
388 	dget(dentry);  /* pin link dentries in core */  in configfs_create_link()
392 	configfs_put(dentry->d_fsdata);  in configfs_create_link()
393 	configfs_remove_dirent(dentry);  in configfs_create_link()
397 static void remove_dir(struct dentry * d)  in remove_dir()
399 	struct dentry * parent = dget(d->d_parent);  in remove_dir()
430 	struct dentry * dentry = dget(item->ci_dentry);  in configfs_remove_dir()  local
432 	if (!dentry)  in configfs_remove_dir()
435 	remove_dir(dentry);  in configfs_remove_dir()
439 	dput(dentry);  in configfs_remove_dir()
442 static struct dentry * configfs_lookup(struct inode *dir,  in configfs_lookup()
443 				       struct dentry *dentry,  in configfs_lookup()  argument
446 	struct configfs_dirent * parent_sd = dentry->d_parent->d_fsdata;  in configfs_lookup()
450 	if (dentry->d_name.len > NAME_MAX)  in configfs_lookup()
479 		    !strcmp(configfs_get_name(sd), dentry->d_name.name)) {  in configfs_lookup()
483 			dentry->d_fsdata = configfs_get(sd);  in configfs_lookup()
484 			sd->s_dentry = dentry;  in configfs_lookup()
487 			inode = configfs_create(dentry, mode);  in configfs_lookup()
504 	d_add(dentry, inode);  in configfs_lookup()
516 static int configfs_detach_prep(struct dentry *dentry, struct dentry **wait)  in configfs_detach_prep()  argument
518 	struct configfs_dirent *parent_sd = dentry->d_fsdata;  in configfs_detach_prep()
563 static void configfs_detach_rollback(struct dentry *dentry)  in configfs_detach_rollback()  argument
565 	struct configfs_dirent *parent_sd = dentry->d_fsdata;  in configfs_detach_rollback()
577 	struct dentry * dentry = dget(item->ci_dentry);  in detach_attrs()  local
581 	if (!dentry)  in detach_attrs()
585 		 dentry->d_name.name);  in detach_attrs()
587 	parent_sd = dentry->d_fsdata;  in detach_attrs()
594 		configfs_drop_dentry(sd, dentry);  in detach_attrs()
601 	dput(dentry);  in detach_attrs()
646 				 struct dentry *dentry,
652 	struct dentry * dentry = dget(group->cg_item.ci_dentry);  in detach_groups()  local
653 	struct dentry *child;  in detach_groups()
657 	if (!dentry)  in detach_groups()
660 	parent_sd = dentry->d_fsdata;  in detach_groups()
683 	dput(dentry);  in detach_groups()
701 	struct dentry *child, *parent = parent_group->cg_item.ci_dentry;  in create_default_group()
847 				struct dentry *dentry,  in configfs_attach_item()  argument
852 	ret = configfs_create_dir(item, dentry, frag);  in configfs_attach_item()
861 			inode_lock(d_inode(dentry));  in configfs_attach_item()
863 			d_inode(dentry)->i_flags |= S_DEAD;  in configfs_attach_item()
864 			dont_mount(dentry);  in configfs_attach_item()
865 			inode_unlock(d_inode(dentry));  in configfs_attach_item()
866 			d_delete(dentry);  in configfs_attach_item()
882 				 struct dentry *dentry,  in configfs_attach_group()  argument
888 	ret = configfs_attach_item(parent_item, item, dentry, frag);  in configfs_attach_group()
890 		sd = dentry->d_fsdata;  in configfs_attach_group()
902 		inode_lock_nested(d_inode(dentry), I_MUTEX_CHILD);  in configfs_attach_group()
907 			d_inode(dentry)->i_flags |= S_DEAD;  in configfs_attach_group()
908 			dont_mount(dentry);  in configfs_attach_group()
911 		inode_unlock(d_inode(dentry));  in configfs_attach_group()
913 			d_delete(dentry);  in configfs_attach_group()
1068 static int configfs_depend_prep(struct dentry *origin,  in configfs_depend_prep()
1098 static int configfs_do_depend_item(struct dentry *subsys_dentry,  in configfs_do_depend_item()
1148 	struct dentry *root;  in configfs_depend_item()
1288 static struct dentry *configfs_mkdir(struct mnt_idmap *idmap, struct inode *dir,  in configfs_mkdir()
1289 				     struct dentry *dentry, umode_t mode)  in configfs_mkdir()  argument
1303 	sd = dentry->d_parent->d_fsdata;  in configfs_mkdir()
1326 	parent_item = configfs_get_config_item(dentry->d_parent);  in configfs_mkdir()
1353 	name = kmalloc(dentry->d_name.len + 1, GFP_KERNEL);  in configfs_mkdir()
1359 	snprintf(name, dentry->d_name.len + 1, "%s", dentry->d_name.name);  in configfs_mkdir()
1427 		ret = configfs_attach_group(parent_item, item, dentry, frag);  in configfs_mkdir()
1429 		ret = configfs_attach_item(parent_item, item, dentry, frag);  in configfs_mkdir()
1434 		configfs_dir_set_ready(dentry->d_fsdata);  in configfs_mkdir()
1472 static int configfs_rmdir(struct inode *dir, struct dentry *dentry)  in configfs_rmdir()  argument
1482 	sd = dentry->d_fsdata;  in configfs_rmdir()
1487 	parent_item = configfs_get_config_item(dentry->d_parent);  in configfs_rmdir()
1505 		struct dentry *wait;  in configfs_rmdir()
1516 			ret = configfs_detach_prep(dentry, &wait);  in configfs_rmdir()
1518 				configfs_detach_rollback(dentry);  in configfs_rmdir()
1539 		configfs_detach_rollback(dentry);  in configfs_rmdir()
1548 	item = configfs_get_config_item(dentry);  in configfs_rmdir()
1598 	struct dentry * dentry = file->f_path.dentry;  in configfs_dir_open()  local
1599 	struct configfs_dirent * parent_sd = dentry->d_fsdata;  in configfs_dir_open()
1602 	inode_lock(d_inode(dentry));  in configfs_dir_open()
1612 	inode_unlock(d_inode(dentry));  in configfs_dir_open()
1619 	struct dentry * dentry = file->f_path.dentry;  in configfs_dir_close()  local
1622 	inode_lock(d_inode(dentry));  in configfs_dir_close()
1626 	inode_unlock(d_inode(dentry));  in configfs_dir_close()
1635 	struct dentry *dentry = file->f_path.dentry;  in configfs_readdir()  local
1636 	struct super_block *sb = dentry->d_sb;  in configfs_readdir()
1637 	struct configfs_dirent * parent_sd = dentry->d_fsdata;  in configfs_readdir()
1670 		dentry = next->s_dentry;  in configfs_readdir()
1671 		if (dentry)  in configfs_readdir()
1672 			inode = d_inode(dentry);  in configfs_readdir()
1697 	struct dentry * dentry = file->f_path.dentry;  in configfs_dir_lseek()  local
1713 			struct configfs_dirent *sd = dentry->d_fsdata;  in configfs_dir_lseek()
1758 	struct dentry *parent;  in configfs_register_group()
1802 	struct dentry *dentry = group->cg_item.ci_dentry;  in configfs_unregister_group()  local
1803 	struct dentry *parent = group->cg_item.ci_parent->ci_dentry;  in configfs_unregister_group()
1804 	struct configfs_dirent *sd = dentry->d_fsdata;  in configfs_unregister_group()
1813 	configfs_detach_prep(dentry, NULL);  in configfs_unregister_group()
1817 	d_inode(dentry)->i_flags |= S_DEAD;  in configfs_unregister_group()
1818 	dont_mount(dentry);  in configfs_unregister_group()
1819 	d_drop(dentry);  in configfs_unregister_group()
1820 	fsnotify_rmdir(d_inode(parent), dentry);  in configfs_unregister_group()
1823 	dput(dentry);  in configfs_unregister_group()
1879 	struct dentry *dentry;  in configfs_register_subsystem()  local
1880 	struct dentry *root;  in configfs_register_subsystem()
1905 	dentry = d_alloc_name(root, group->cg_item.ci_name);  in configfs_register_subsystem()
1906 	if (dentry) {  in configfs_register_subsystem()
1907 		d_add(dentry, NULL);  in configfs_register_subsystem()
1909 		err = configfs_dirent_exists(dentry);  in configfs_register_subsystem()
1913 						    dentry, frag);  in configfs_register_subsystem()
1915 			BUG_ON(d_inode(dentry));  in configfs_register_subsystem()
1916 			d_drop(dentry);  in configfs_register_subsystem()
1917 			dput(dentry);  in configfs_register_subsystem()
1920 			configfs_dir_set_ready(dentry->d_fsdata);  in configfs_register_subsystem()
1941 	struct dentry *dentry = group->cg_item.ci_dentry;  in configfs_unregister_subsystem()  local
1942 	struct dentry *root = dentry->d_sb->s_root;  in configfs_unregister_subsystem()
1943 	struct configfs_dirent *sd = dentry->d_fsdata;  in configfs_unregister_subsystem()
1946 	if (dentry->d_parent != root) {  in configfs_unregister_subsystem()
1957 	inode_lock_nested(d_inode(dentry), I_MUTEX_CHILD);  in configfs_unregister_subsystem()
1960 	if (configfs_detach_prep(dentry, NULL)) {  in configfs_unregister_subsystem()
1966 	d_inode(dentry)->i_flags |= S_DEAD;  in configfs_unregister_subsystem()
1967 	dont_mount(dentry);  in configfs_unregister_subsystem()
1968 	inode_unlock(d_inode(dentry));  in configfs_unregister_subsystem()
1970 	d_drop(dentry);  in configfs_unregister_subsystem()
1971 	fsnotify_rmdir(d_inode(root), dentry);  in configfs_unregister_subsystem()
1975 	dput(dentry);  in configfs_unregister_subsystem()