44 static int debugfs_setattr(struct dentry *dentry, struct iattr *ia)  in debugfs_setattr()  argument
50 	return simple_setattr(dentry, ia);  in debugfs_setattr()
179 static int debugfs_show_options(struct seq_file *m, struct dentry *root)  in debugfs_show_options()
210 static void debugfs_release_dentry(struct dentry *dentry)  in debugfs_release_dentry()  argument
212 	void *fsd = dentry->d_fsdata;  in debugfs_release_dentry()
215 		kfree(dentry->d_fsdata);  in debugfs_release_dentry()
221 	f = (debugfs_automount_t)path->dentry->d_fsdata;  in debugfs_automount()
222 	return f(path->dentry, d_inode(path->dentry)->i_private);  in debugfs_automount()
265 static struct dentry *debug_mount(struct file_system_type *fs_type,  in debug_mount()
292 struct dentry *debugfs_lookup(const char *name, struct dentry *parent)  in debugfs_lookup()
294 	struct dentry *dentry;  in debugfs_lookup()  local
302 	dentry = lookup_one_len_unlocked(name, parent, strlen(name));  in debugfs_lookup()
303 	if (IS_ERR(dentry))  in debugfs_lookup()
305 	if (!d_really_is_positive(dentry)) {  in debugfs_lookup()
306 		dput(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
339 	dentry = lookup_one_len(name, parent, strlen(name));  in start_creating()
340 	if (!IS_ERR(dentry) && d_really_is_positive(dentry)) {  in start_creating()
341 		if (d_is_dir(dentry))  in start_creating()
347 		dput(dentry);  in start_creating()
348 		dentry = ERR_PTR(-EEXIST);  in start_creating()
351 	if (IS_ERR(dentry)) {  in start_creating()
356 	return dentry;  in start_creating()
359 static struct dentry *failed_creating(struct dentry *dentry)  in failed_creating()  argument
361 	inode_unlock(d_inode(dentry->d_parent));  in failed_creating()
362 	dput(dentry);  in failed_creating()
367 static struct dentry *end_creating(struct dentry *dentry)  in end_creating()  argument
369 	inode_unlock(d_inode(dentry->d_parent));  in end_creating()
370 	return dentry;  in end_creating()
373 static struct dentry *__debugfs_create_file(const char *name, umode_t mode,  in __debugfs_create_file()
374 				struct dentry *parent, void *data,  in __debugfs_create_file()
378 	struct dentry *dentry;  in __debugfs_create_file()  local
384 	dentry = start_creating(name, parent);  in __debugfs_create_file()
386 	if (IS_ERR(dentry))  in __debugfs_create_file()
387 		return dentry;  in __debugfs_create_file()
389 	inode = debugfs_get_inode(dentry->d_sb);  in __debugfs_create_file()
393 		return failed_creating(dentry);  in __debugfs_create_file()
401 	dentry->d_fsdata = (void *)((unsigned long)real_fops |  in __debugfs_create_file()
404 	d_instantiate(dentry, inode);  in __debugfs_create_file()
405 	fsnotify_create(d_inode(dentry->d_parent), dentry);  in __debugfs_create_file()
406 	return end_creating(dentry);  in __debugfs_create_file()
436 struct dentry *debugfs_create_file(const char *name, umode_t mode,  in debugfs_create_file()
437 				   struct dentry *parent, void *data,  in debugfs_create_file()
475 struct dentry *debugfs_create_file_unsafe(const char *name, umode_t mode,  in debugfs_create_file_unsafe()
476 				   struct dentry *parent, void *data,  in debugfs_create_file_unsafe()
515 struct dentry *debugfs_create_file_size(const char *name, umode_t mode,  in debugfs_create_file_size()
516 					struct dentry *parent, void *data,  in debugfs_create_file_size()
520 	struct dentry *de = debugfs_create_file(name, mode, parent, data, fops);  in debugfs_create_file_size()
547 struct dentry *debugfs_create_dir(const char *name, struct dentry *parent)  in debugfs_create_dir()
549 	struct dentry *dentry = start_creating(name, parent);  in debugfs_create_dir()  local
552 	if (IS_ERR(dentry))  in debugfs_create_dir()
553 		return dentry;  in debugfs_create_dir()
555 	inode = debugfs_get_inode(dentry->d_sb);  in debugfs_create_dir()
559 		return failed_creating(dentry);  in debugfs_create_dir()
568 	d_instantiate(dentry, inode);  in debugfs_create_dir()
569 	inc_nlink(d_inode(dentry->d_parent));  in debugfs_create_dir()
570 	fsnotify_mkdir(d_inode(dentry->d_parent), dentry);  in debugfs_create_dir()
571 	return end_creating(dentry);  in debugfs_create_dir()
586 struct dentry *debugfs_create_automount(const char *name,  in debugfs_create_automount()
587 					struct dentry *parent,  in debugfs_create_automount()
591 	struct dentry *dentry = start_creating(name, parent);  in debugfs_create_automount()  local
594 	if (IS_ERR(dentry))  in debugfs_create_automount()
595 		return dentry;  in debugfs_create_automount()
597 	inode = debugfs_get_inode(dentry->d_sb);  in debugfs_create_automount()
601 		return failed_creating(dentry);  in debugfs_create_automount()
607 	dentry->d_fsdata = (void *)f;  in debugfs_create_automount()
610 	d_instantiate(dentry, inode);  in debugfs_create_automount()
611 	inc_nlink(d_inode(dentry->d_parent));  in debugfs_create_automount()
612 	fsnotify_mkdir(d_inode(dentry->d_parent), dentry);  in debugfs_create_automount()
613 	return end_creating(dentry);  in debugfs_create_automount()
640 struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,  in debugfs_create_symlink()
643 	struct dentry *dentry;  in debugfs_create_symlink()  local
649 	dentry = start_creating(name, parent);  in debugfs_create_symlink()
650 	if (IS_ERR(dentry)) {  in debugfs_create_symlink()
652 		return dentry;  in debugfs_create_symlink()
655 	inode = debugfs_get_inode(dentry->d_sb);  in debugfs_create_symlink()
660 		return failed_creating(dentry);  in debugfs_create_symlink()
665 	d_instantiate(dentry, inode);  in debugfs_create_symlink()
666 	return end_creating(dentry);  in debugfs_create_symlink()
670 static void __debugfs_file_removed(struct dentry *dentry)  in __debugfs_file_removed()  argument
681 	fsd = READ_ONCE(dentry->d_fsdata);  in __debugfs_file_removed()
688 static int __debugfs_remove(struct dentry *dentry, struct dentry *parent)  in __debugfs_remove()  argument
692 	if (simple_positive(dentry)) {  in __debugfs_remove()
693 		dget(dentry);  in __debugfs_remove()
694 		if (d_is_dir(dentry)) {  in __debugfs_remove()
695 			ret = simple_rmdir(d_inode(parent), dentry);  in __debugfs_remove()
697 				fsnotify_rmdir(d_inode(parent), dentry);  in __debugfs_remove()
699 			simple_unlink(d_inode(parent), dentry);  in __debugfs_remove()
700 			fsnotify_unlink(d_inode(parent), dentry);  in __debugfs_remove()
703 			d_delete(dentry);  in __debugfs_remove()
704 		if (d_is_reg(dentry))  in __debugfs_remove()
705 			__debugfs_file_removed(dentry);  in __debugfs_remove()
706 		dput(dentry);  in __debugfs_remove()
725 void debugfs_remove(struct dentry *dentry)  in debugfs_remove()  argument
727 	struct dentry *parent;  in debugfs_remove()
730 	if (IS_ERR_OR_NULL(dentry))  in debugfs_remove()
733 	parent = dentry->d_parent;  in debugfs_remove()
735 	ret = __debugfs_remove(dentry, parent);  in debugfs_remove()
755 void debugfs_remove_recursive(struct dentry *dentry)  in debugfs_remove_recursive()  argument
757 	struct dentry *child, *parent;  in debugfs_remove_recursive()
759 	if (IS_ERR_OR_NULL(dentry))  in debugfs_remove_recursive()
762 	parent = dentry;  in debugfs_remove_recursive()
805 	if (child != dentry)  in debugfs_remove_recursive()
834 struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,  in debugfs_rename()
835 		struct dentry *new_dir, const char *new_name)  in debugfs_rename()
838 	struct dentry *dentry = NULL, *trap;  in debugfs_rename()  local
856 	dentry = lookup_one_len(new_name, new_dir, strlen(new_name));  in debugfs_rename()
858 	if (IS_ERR(dentry) || dentry == trap || d_really_is_positive(dentry))  in debugfs_rename()
864 			      dentry, 0);  in debugfs_rename()
869 	d_move(old_dentry, dentry);  in debugfs_rename()
875 	dput(dentry);  in debugfs_rename()
878 	if (dentry && !IS_ERR(dentry))  in debugfs_rename()
879 		dput(dentry);  in debugfs_rename()
881 	if (IS_ERR(dentry))  in debugfs_rename()
882 		return dentry;  in debugfs_rename()