45 static int debugfs_setattr(struct dentry *dentry, struct iattr *ia)  in debugfs_setattr()  argument
51 	return simple_setattr(dentry, ia);  in debugfs_setattr()
180 static int debugfs_show_options(struct seq_file *m, struct dentry *root)  in debugfs_show_options()
211 static void debugfs_release_dentry(struct dentry *dentry)  in debugfs_release_dentry()  argument
213 	void *fsd = dentry->d_fsdata;  in debugfs_release_dentry()
216 		kfree(dentry->d_fsdata);  in debugfs_release_dentry()
222 	f = (debugfs_automount_t)path->dentry->d_fsdata;  in debugfs_automount()
223 	return f(path->dentry, d_inode(path->dentry)->i_private);  in debugfs_automount()
266 static struct dentry *debug_mount(struct file_system_type *fs_type,  in debug_mount()
296 struct dentry *debugfs_lookup(const char *name, struct dentry *parent)  in debugfs_lookup()
298 	struct dentry *dentry;  in debugfs_lookup()  local
306 	dentry = lookup_positive_unlocked(name, parent, strlen(name));  in debugfs_lookup()
307 	if (IS_ERR(dentry))  in debugfs_lookup()
309 	return dentry;  in debugfs_lookup()
313 static struct dentry *start_creating(const char *name, struct dentry *parent)  in start_creating()
315 	struct dentry *dentry;  in start_creating()  local
343 		dentry = ERR_PTR(-ENOENT);  in start_creating()
345 		dentry = lookup_one_len(name, parent, strlen(name));  in start_creating()
346 	if (!IS_ERR(dentry) && d_really_is_positive(dentry)) {  in start_creating()
347 		if (d_is_dir(dentry))  in start_creating()
353 		dput(dentry);  in start_creating()
354 		dentry = ERR_PTR(-EEXIST);  in start_creating()
357 	if (IS_ERR(dentry)) {  in start_creating()
362 	return dentry;  in start_creating()
365 static struct dentry *failed_creating(struct dentry *dentry)  in failed_creating()  argument
367 	inode_unlock(d_inode(dentry->d_parent));  in failed_creating()
368 	dput(dentry);  in failed_creating()
373 static struct dentry *end_creating(struct dentry *dentry)  in end_creating()  argument
375 	inode_unlock(d_inode(dentry->d_parent));  in end_creating()
376 	return dentry;  in end_creating()
379 static struct dentry *__debugfs_create_file(const char *name, umode_t mode,  in __debugfs_create_file()
380 				struct dentry *parent, void *data,  in __debugfs_create_file()
384 	struct dentry *dentry;  in __debugfs_create_file()  local
390 	dentry = start_creating(name, parent);  in __debugfs_create_file()
392 	if (IS_ERR(dentry))  in __debugfs_create_file()
393 		return dentry;  in __debugfs_create_file()
396 		failed_creating(dentry);  in __debugfs_create_file()
400 	inode = debugfs_get_inode(dentry->d_sb);  in __debugfs_create_file()
404 		return failed_creating(dentry);  in __debugfs_create_file()
412 	dentry->d_fsdata = (void *)((unsigned long)real_fops |  in __debugfs_create_file()
415 	d_instantiate(dentry, inode);  in __debugfs_create_file()
416 	fsnotify_create(d_inode(dentry->d_parent), dentry);  in __debugfs_create_file()
417 	return end_creating(dentry);  in __debugfs_create_file()
447 struct dentry *debugfs_create_file(const char *name, umode_t mode,  in debugfs_create_file()
448 				   struct dentry *parent, void *data,  in debugfs_create_file()
486 struct dentry *debugfs_create_file_unsafe(const char *name, umode_t mode,  in debugfs_create_file_unsafe()
487 				   struct dentry *parent, void *data,  in debugfs_create_file_unsafe()
518 			      struct dentry *parent, void *data,  in debugfs_create_file_size()
522 	struct dentry *de = debugfs_create_file(name, mode, parent, data, fops);  in debugfs_create_file_size()
548 struct dentry *debugfs_create_dir(const char *name, struct dentry *parent)  in debugfs_create_dir()
550 	struct dentry *dentry = start_creating(name, parent);  in debugfs_create_dir()  local
553 	if (IS_ERR(dentry))  in debugfs_create_dir()
554 		return dentry;  in debugfs_create_dir()
557 		failed_creating(dentry);  in debugfs_create_dir()
561 	inode = debugfs_get_inode(dentry->d_sb);  in debugfs_create_dir()
565 		return failed_creating(dentry);  in debugfs_create_dir()
574 	d_instantiate(dentry, inode);  in debugfs_create_dir()
575 	inc_nlink(d_inode(dentry->d_parent));  in debugfs_create_dir()
576 	fsnotify_mkdir(d_inode(dentry->d_parent), dentry);  in debugfs_create_dir()
577 	return end_creating(dentry);  in debugfs_create_dir()
592 struct dentry *debugfs_create_automount(const char *name,  in debugfs_create_automount()
593 					struct dentry *parent,  in debugfs_create_automount()
597 	struct dentry *dentry = start_creating(name, parent);  in debugfs_create_automount()  local
600 	if (IS_ERR(dentry))  in debugfs_create_automount()
601 		return dentry;  in debugfs_create_automount()
604 		failed_creating(dentry);  in debugfs_create_automount()
608 	inode = debugfs_get_inode(dentry->d_sb);  in debugfs_create_automount()
612 		return failed_creating(dentry);  in debugfs_create_automount()
618 	dentry->d_fsdata = (void *)f;  in debugfs_create_automount()
621 	d_instantiate(dentry, inode);  in debugfs_create_automount()
622 	inc_nlink(d_inode(dentry->d_parent));  in debugfs_create_automount()
623 	fsnotify_mkdir(d_inode(dentry->d_parent), dentry);  in debugfs_create_automount()
624 	return end_creating(dentry);  in debugfs_create_automount()
651 struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,  in debugfs_create_symlink()
654 	struct dentry *dentry;  in debugfs_create_symlink()  local
660 	dentry = start_creating(name, parent);  in debugfs_create_symlink()
661 	if (IS_ERR(dentry)) {  in debugfs_create_symlink()
663 		return dentry;  in debugfs_create_symlink()
666 	inode = debugfs_get_inode(dentry->d_sb);  in debugfs_create_symlink()
671 		return failed_creating(dentry);  in debugfs_create_symlink()
676 	d_instantiate(dentry, inode);  in debugfs_create_symlink()
677 	return end_creating(dentry);  in debugfs_create_symlink()
681 static void __debugfs_file_removed(struct dentry *dentry)  in __debugfs_file_removed()  argument
692 	fsd = READ_ONCE(dentry->d_fsdata);  in __debugfs_file_removed()
699 static void remove_one(struct dentry *victim)  in remove_one()
719 void debugfs_remove(struct dentry *dentry)  in debugfs_remove()  argument
721 	if (IS_ERR_OR_NULL(dentry))  in debugfs_remove()
725 	simple_recursive_removal(dentry, remove_one);  in debugfs_remove()
749 struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,  in debugfs_rename()
750 		struct dentry *new_dir, const char *new_name)  in debugfs_rename()
753 	struct dentry *dentry = NULL, *trap;  in debugfs_rename()  local
771 	dentry = lookup_one_len(new_name, new_dir, strlen(new_name));  in debugfs_rename()
773 	if (IS_ERR(dentry) || dentry == trap || d_really_is_positive(dentry))  in debugfs_rename()
779 			      dentry, 0);  in debugfs_rename()
784 	d_move(old_dentry, dentry);  in debugfs_rename()
790 	dput(dentry);  in debugfs_rename()
793 	if (dentry && !IS_ERR(dentry))  in debugfs_rename()
794 		dput(dentry);  in debugfs_rename()
796 	if (IS_ERR(dentry))  in debugfs_rename()
797 		return dentry;  in debugfs_rename()