# SPDX-License-Identifier: GPL-2.0
config AUFS_FS
	bool "Aufs (Advanced multi layered unification filesystem) support"
	help
	Aufs is a stackable unification filesystem such as Unionfs,
	which unifies several directories and provides a merged single
	directory.
	In the early days, aufs was entirely re-designed and
	re-implemented Unionfs Version 1.x series. Introducing many
	original ideas, approaches and improvements, it becomes totally
	different from Unionfs while keeping the basic features.

if AUFS_FS
choice
	prompt "Maximum number of branches"
	default AUFS_BRANCH_MAX_127
	help
	Specifies the maximum number of branches (or member directories)
	in a single aufs. The larger value consumes more system
	resources and has a minor impact to performance.
config AUFS_BRANCH_MAX_127
	bool "127"
	help
	Specifies the maximum number of branches (or member directories)
	in a single aufs. The larger value consumes more system
	resources and has a minor impact to performance.
config AUFS_BRANCH_MAX_511
	bool "511"
	help
	Specifies the maximum number of branches (or member directories)
	in a single aufs. The larger value consumes more system
	resources and has a minor impact to performance.
config AUFS_BRANCH_MAX_1023
	bool "1023"
	help
	Specifies the maximum number of branches (or member directories)
	in a single aufs. The larger value consumes more system
	resources and has a minor impact to performance.
config AUFS_BRANCH_MAX_32767
	bool "32767"
	help
	Specifies the maximum number of branches (or member directories)
	in a single aufs. The larger value consumes more system
	resources and has a minor impact to performance.
endchoice

config AUFS_SBILIST
	bool
	depends on PROC_FS
	default y
	help
	Automatic configuration for internal use.
	When aufs supports Magic SysRq or /proc, enabled automatically.

config AUFS_EXPORT
	bool "NFS-exportable aufs"
	depends on EXPORTFS = y
	help
	If you want to export your mounted aufs via NFS, then enable this
	option. There are several requirements for this configuration.
	See detail in aufs.5.

config AUFS_INO_T_64
	bool
	depends on AUFS_EXPORT
	depends on 64BIT && !(ALPHA || S390)
	default y
	help
	Automatic configuration for internal use.
	/* typedef unsigned long/int __kernel_ino_t */
	/* alpha and s390x are int */

config AUFS_DEBUG
	bool "Debug aufs"
	help
	Enable this to compile aufs internal debug code.
	It will have a negative impact to the performance.
endif