561 static int cgroup_mkdir(struct inode *dir, struct dentry *dentry, int mode);
562 static int cgroup_rmdir(struct inode *unused_dir, struct dentry *dentry);
605 static void cgroup_diput(struct dentry *dentry, struct inode *inode)  in cgroup_diput()  argument
609 		struct cgroup *cgrp = dentry->d_fsdata;  in cgroup_diput()
641 static void remove_dir(struct dentry *d)  in remove_dir()
643 	struct dentry *parent = dget(d->d_parent);  in remove_dir()
650 static void cgroup_clear_directory(struct dentry *dentry)  in cgroup_clear_directory()  argument
654 	BUG_ON(!mutex_is_locked(&dentry->d_inode->i_mutex));  in cgroup_clear_directory()
656 	node = dentry->d_subdirs.next;  in cgroup_clear_directory()
657 	while (node != &dentry->d_subdirs) {  in cgroup_clear_directory()
658 		struct dentry *d = list_entry(node, struct dentry, d_u.d_child);  in cgroup_clear_directory()
667 			simple_unlink(dentry->d_inode, d);  in cgroup_clear_directory()
671 		node = dentry->d_subdirs.next;  in cgroup_clear_directory()
679 static void cgroup_d_remove_dir(struct dentry *dentry)  in cgroup_d_remove_dir()  argument
681 	cgroup_clear_directory(dentry);  in cgroup_d_remove_dir()
684 	list_del_init(&dentry->d_u.d_child);  in cgroup_d_remove_dir()
686 	remove_dir(dentry);  in cgroup_d_remove_dir()
846 	mutex_lock(&cgrp->dentry->d_inode->i_mutex);  in cgroup_remount()
872 	mutex_unlock(&cgrp->dentry->d_inode->i_mutex);  in cgroup_remount()
942 	struct dentry *dentry;  in cgroup_get_rootdir()  local
951 	dentry = d_alloc_root(inode);  in cgroup_get_rootdir()
952 	if (!dentry) {  in cgroup_get_rootdir()
956 	sb->s_root = dentry;  in cgroup_get_rootdir()
1049 		root->top_cgroup.dentry = sb->s_root;  in cgroup_get_sb()
1136 static inline struct cgroup *__d_cgrp(struct dentry *dentry)  in __d_cgrp()  argument
1138 	return dentry->d_fsdata;  in __d_cgrp()
1141 static inline struct cftype *__d_cft(struct dentry *dentry)  in __d_cft()  argument
1143 	return dentry->d_fsdata;  in __d_cft()
1159 	struct dentry *dentry = rcu_dereference(cgrp->dentry);  in cgroup_path()  local
1161 	if (!dentry || cgrp == dummytop) {  in cgroup_path()
1174 		int len = dentry->d_name.len;  in cgroup_path()
1177 		memcpy(start, cgrp->dentry->d_name.name, len);  in cgroup_path()
1181 		dentry = rcu_dereference(cgrp->dentry);  in cgroup_path()
1601 static int cgroup_rename(struct inode *old_dir, struct dentry *old_dentry,  in cgroup_rename()
1602 			    struct inode *new_dir, struct dentry *new_dentry)  in cgroup_rename()
1628 static int cgroup_create_file(struct dentry *dentry, int mode,  in cgroup_create_file()  argument
1637 	if (!dentry)  in cgroup_create_file()
1639 	if (dentry->d_inode)  in cgroup_create_file()
1660 	dentry->d_op = &cgroup_dops;  in cgroup_create_file()
1661 	d_instantiate(dentry, inode);  in cgroup_create_file()
1662 	dget(dentry);	/* Extra count - pin the dentry in core */  in cgroup_create_file()
1673 static int cgroup_create_dir(struct cgroup *cgrp, struct dentry *dentry,  in cgroup_create_dir()  argument
1676 	struct dentry *parent;  in cgroup_create_dir()
1679 	parent = cgrp->parent->dentry;  in cgroup_create_dir()
1680 	error = cgroup_create_file(dentry, S_IFDIR | mode, cgrp->root->sb);  in cgroup_create_dir()
1682 		dentry->d_fsdata = cgrp;  in cgroup_create_dir()
1684 		rcu_assign_pointer(cgrp->dentry, dentry);  in cgroup_create_dir()
1685 		dget(dentry);  in cgroup_create_dir()
1687 	dput(dentry);  in cgroup_create_dir()
1696 	struct dentry *dir = cgrp->dentry;  in cgroup_add_file()
1697 	struct dentry *dentry;  in cgroup_add_file()  local
1707 	dentry = lookup_one_len(name, dir, strlen(name));  in cgroup_add_file()
1708 	if (!IS_ERR(dentry)) {  in cgroup_add_file()
1709 		error = cgroup_create_file(dentry, 0644 | S_IFREG,  in cgroup_add_file()
1712 			dentry->d_fsdata = (void *)cft;  in cgroup_add_file()
1713 		dput(dentry);  in cgroup_add_file()
1715 		error = PTR_ERR(dentry);  in cgroup_add_file()
2052 int cgroupstats_build(struct cgroupstats *stats, struct dentry *dentry)  in cgroupstats_build()  argument
2063 	if (dentry->d_sb->s_op != &cgroup_ops ||  in cgroupstats_build()
2064 	    !S_ISDIR(dentry->d_inode->i_mode))  in cgroupstats_build()
2068 	cgrp = dentry->d_fsdata;  in cgroupstats_build()
2315 	cgroup_clear_directory(cgrp->dentry);  in cgroup_populate_dir()
2378 static long cgroup_create(struct cgroup *parent, struct dentry *dentry,  in cgroup_create()  argument
2423 	err = cgroup_create_dir(cgrp, dentry, mode);  in cgroup_create()
2428 	BUG_ON(!mutex_is_locked(&cgrp->dentry->d_inode->i_mutex));  in cgroup_create()
2434 	mutex_unlock(&cgrp->dentry->d_inode->i_mutex);  in cgroup_create()
2461 static int cgroup_mkdir(struct inode *dir, struct dentry *dentry, int mode)  in cgroup_mkdir()  argument
2463 	struct cgroup *c_parent = dentry->d_parent->d_fsdata;  in cgroup_mkdir()
2466 	return cgroup_create(c_parent, dentry, mode | S_IFDIR);  in cgroup_mkdir()
2553 static int cgroup_rmdir(struct inode *unused_dir, struct dentry *dentry)  in cgroup_rmdir()  argument
2555 	struct cgroup *cgrp = dentry->d_fsdata;  in cgroup_rmdir()
2556 	struct dentry *d;  in cgroup_rmdir()
2599 	spin_lock(&cgrp->dentry->d_lock);  in cgroup_rmdir()
2600 	d = dget(cgrp->dentry);  in cgroup_rmdir()
2983 	struct dentry *dentry;  in cgroup_clone()  local
3021 	inode = parent->dentry->d_inode;  in cgroup_clone()
3026 	dentry = lookup_one_len(nodename, parent->dentry, strlen(nodename));  in cgroup_clone()
3027 	if (IS_ERR(dentry)) {  in cgroup_clone()
3030 		       PTR_ERR(dentry));  in cgroup_clone()
3031 		ret = PTR_ERR(dentry);  in cgroup_clone()
3036 	ret = vfs_mkdir(inode, dentry, 0755);  in cgroup_clone()
3037 	child = __d_cgrp(dentry);  in cgroup_clone()
3038 	dput(dentry);  in cgroup_clone()