[mirror_ubuntu-kernels.git] / fs / Kconfig

# SPDX-License-Identifier: GPL-2.0-only
#
# File system configuration
#

menu "File systems"

# Use unaligned word dcache accesses
config DCACHE_WORD_ACCESS
       bool

config VALIDATE_FS_PARSER
	bool "Validate filesystem parameter description"
	help
	  Enable this to perform validation of the parameter description for a
	  filesystem when it is registered.

if BLOCK

config FS_IOMAP
	bool

source "fs/ext2/Kconfig"
source "fs/ext4/Kconfig"
source "fs/jbd2/Kconfig"

config FS_MBCACHE
# Meta block cache for Extended Attributes (ext2/ext3/ext4)
	tristate
	default y if EXT2_FS=y && EXT2_FS_XATTR
	default y if EXT4_FS=y
	default m if EXT2_FS_XATTR || EXT4_FS

source "fs/reiserfs/Kconfig"
source "fs/jfs/Kconfig"

source "fs/xfs/Kconfig"
source "fs/gfs2/Kconfig"
source "fs/ocfs2/Kconfig"
source "fs/btrfs/Kconfig"
source "fs/nilfs2/Kconfig"
source "fs/f2fs/Kconfig"
source "fs/zonefs/Kconfig"

config FS_DAX
	bool "Direct Access (DAX) support"
	depends on MMU
	depends on !(ARM || MIPS || SPARC)
	select DEV_PAGEMAP_OPS if (ZONE_DEVICE && !FS_DAX_LIMITED)
	select FS_IOMAP
	select DAX
	help
	  Direct Access (DAX) can be used on memory-backed block devices.
	  If the block device supports DAX and the filesystem supports DAX,
	  then you can avoid using the pagecache to buffer I/Os.  Turning
	  on this option will compile in support for DAX; you will need to
	  mount the filesystem using the -o dax option.

	  If you do not have a block device that is capable of using this,
	  or if unsure, say N.  Saying Y will increase the size of the kernel
	  by about 5kB.

config FS_DAX_PMD
	bool
	default FS_DAX
	depends on FS_DAX
	depends on ZONE_DEVICE
	depends on TRANSPARENT_HUGEPAGE

# Selected by DAX drivers that do not expect filesystem DAX to support
# get_user_pages() of DAX mappings. I.e. "limited" indicates no support
# for fork() of processes with MAP_SHARED mappings or support for
# direct-I/O to a DAX mapping.
config FS_DAX_LIMITED
	bool

endif # BLOCK

# Posix ACL utility routines
#
# Note: Posix ACLs can be implemented without these helpers.  Never use
# this symbol for ifdefs in core code.
#
config FS_POSIX_ACL
	def_bool n

config EXPORTFS
	tristate

config EXPORTFS_BLOCK_OPS
	bool "Enable filesystem export operations for block IO"
	help
	  This option enables the export operations for a filesystem to support
	  external block IO.

config FILE_LOCKING
	bool "Enable POSIX file locking API" if EXPERT
	default y
	help
	  This option enables standard file locking support, required
          for filesystems like NFS and for the flock() system
          call. Disabling this option saves about 11k.

config MANDATORY_FILE_LOCKING
	bool "Enable Mandatory file locking"
	depends on FILE_LOCKING
	default y
	help
	  This option enables files appropriately marked files on appropriely
	  mounted filesystems to support mandatory locking.

	  To the best of my knowledge this is dead code that no one cares about.

source "fs/crypto/Kconfig"

source "fs/verity/Kconfig"

source "fs/notify/Kconfig"

source "fs/quota/Kconfig"

source "fs/autofs/Kconfig"
source "fs/fuse/Kconfig"
source "fs/overlayfs/Kconfig"

menu "Caches"

source "fs/netfs/Kconfig"
source "fs/fscache/Kconfig"
source "fs/cachefiles/Kconfig"

endmenu

if BLOCK
menu "CD-ROM/DVD Filesystems"

source "fs/isofs/Kconfig"
source "fs/udf/Kconfig"

endmenu
endif # BLOCK

if BLOCK
menu "DOS/FAT/EXFAT/NT Filesystems"

source "fs/fat/Kconfig"
source "fs/exfat/Kconfig"
source "fs/ntfs/Kconfig"

endmenu
endif # BLOCK

menu "Pseudo filesystems"

source "fs/proc/Kconfig"
source "fs/kernfs/Kconfig"
source "fs/sysfs/Kconfig"

config TMPFS
	bool "Tmpfs virtual memory file system support (former shm fs)"
	depends on SHMEM
	help
	  Tmpfs is a file system which keeps all files in virtual memory.

	  Everything in tmpfs is temporary in the sense that no files will be
	  created on your hard drive. The files live in memory and swap
	  space. If you unmount a tmpfs instance, everything stored therein is
	  lost.

	  See <file:Documentation/filesystems/tmpfs.rst> for details.

config TMPFS_POSIX_ACL
	bool "Tmpfs POSIX Access Control Lists"
	depends on TMPFS
	select TMPFS_XATTR
	select FS_POSIX_ACL
	help
	  POSIX Access Control Lists (ACLs) support additional access rights
	  for users and groups beyond the standard owner/group/world scheme,
	  and this option selects support for ACLs specifically for tmpfs
	  filesystems.

	  If you've selected TMPFS, it's possible that you'll also need
	  this option as there are a number of Linux distros that require
	  POSIX ACL support under /dev for certain features to work properly.
	  For example, some distros need this feature for ALSA-related /dev
	  files for sound to work properly.  In short, if you're not sure,
	  say Y.

config TMPFS_XATTR
	bool "Tmpfs extended attributes"
	depends on TMPFS
	default n
	help
	  Extended attributes are name:value pairs associated with inodes by
	  the kernel or by users (see the attr(5) manual page for details).

	  Currently this enables support for the trusted.* and
	  security.* namespaces.

	  You need this for POSIX ACL support on tmpfs.

	  If unsure, say N.

config TMPFS_INODE64
	bool "Use 64-bit ino_t by default in tmpfs"
	depends on TMPFS && 64BIT
	default n
	help
	  tmpfs has historically used only inode numbers as wide as an unsigned
	  int. In some cases this can cause wraparound, potentially resulting
	  in multiple files with the same inode number on a single device. This
	  option makes tmpfs use the full width of ino_t by default, without
	  needing to specify the inode64 option when mounting.

	  But if a long-lived tmpfs is to be accessed by 32-bit applications so
	  ancient that opening a file larger than 2GiB fails with EINVAL, then
	  the INODE64 config option and inode64 mount option risk operations
	  failing with EOVERFLOW once 33-bit inode numbers are reached.

	  To override this configured default, use the inode32 or inode64
	  option when mounting.

	  If unsure, say N.

config ARCH_SUPPORTS_HUGETLBFS
	def_bool n

config HUGETLBFS
	bool "HugeTLB file system support"
	depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
		   ARCH_SUPPORTS_HUGETLBFS || BROKEN
	help
	  hugetlbfs is a filesystem backing for HugeTLB pages, based on
	  ramfs. For architectures that support it, say Y here and read
	  <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.

	  If unsure, say N.

config HUGETLB_PAGE
	def_bool HUGETLBFS

config HUGETLB_PAGE_FREE_VMEMMAP
	def_bool HUGETLB_PAGE
	depends on X86_64
	depends on SPARSEMEM_VMEMMAP

config HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON
	bool "Default freeing vmemmap pages of HugeTLB to on"
	default n
	depends on HUGETLB_PAGE_FREE_VMEMMAP
	help
	  When using HUGETLB_PAGE_FREE_VMEMMAP, the freeing unused vmemmap
	  pages associated with each HugeTLB page is default off. Say Y here
	  to enable freeing vmemmap pages of HugeTLB by default. It can then
	  be disabled on the command line via hugetlb_free_vmemmap=off.

config MEMFD_CREATE
	def_bool TMPFS || HUGETLBFS

config ARCH_HAS_GIGANTIC_PAGE
	bool

source "fs/configfs/Kconfig"
source "fs/efivarfs/Kconfig"

endmenu

menuconfig MISC_FILESYSTEMS
	bool "Miscellaneous filesystems"
	default y
	help
	  Say Y here to get to see options for various miscellaneous
	  filesystems, such as filesystems that came from other
	  operating systems.

	  This option alone does not add any kernel code.

	  If you say N, all options in this submenu will be skipped and
	  disabled; if unsure, say Y here.

if MISC_FILESYSTEMS

source "fs/orangefs/Kconfig"
source "fs/adfs/Kconfig"
source "fs/affs/Kconfig"
source "fs/ecryptfs/Kconfig"
source "fs/hfs/Kconfig"
source "fs/hfsplus/Kconfig"
source "fs/befs/Kconfig"
source "fs/bfs/Kconfig"
source "fs/efs/Kconfig"
source "fs/jffs2/Kconfig"
# UBIFS File system configuration
source "fs/ubifs/Kconfig"
source "fs/cramfs/Kconfig"
source "fs/squashfs/Kconfig"
source "fs/freevxfs/Kconfig"
source "fs/minix/Kconfig"
source "fs/omfs/Kconfig"
source "fs/hpfs/Kconfig"
source "fs/qnx4/Kconfig"
source "fs/qnx6/Kconfig"
source "fs/romfs/Kconfig"
source "fs/pstore/Kconfig"
source "fs/sysv/Kconfig"
source "fs/ufs/Kconfig"
source "fs/erofs/Kconfig"
source "fs/vboxsf/Kconfig"

endif # MISC_FILESYSTEMS

menuconfig NETWORK_FILESYSTEMS
	bool "Network File Systems"
	default y
	depends on NET
	help
	  Say Y here to get to see options for network filesystems and
	  filesystem-related networking code, such as NFS daemon and
	  RPCSEC security modules.

	  This option alone does not add any kernel code.

	  If you say N, all options in this submenu will be skipped and
	  disabled; if unsure, say Y here.

if NETWORK_FILESYSTEMS

source "fs/nfs/Kconfig"
source "fs/nfsd/Kconfig"

config GRACE_PERIOD
	tristate

config LOCKD
	tristate
	depends on FILE_LOCKING
	select GRACE_PERIOD

config LOCKD_V4
	bool
	depends on NFSD_V3 || NFS_V3
	depends on FILE_LOCKING
	default y

config NFS_ACL_SUPPORT
	tristate
	select FS_POSIX_ACL

config NFS_COMMON
	bool
	depends on NFSD || NFS_FS || LOCKD
	default y

config NFS_V4_2_SSC_HELPER
	bool
	default y if NFS_V4_2

source "net/sunrpc/Kconfig"
source "fs/ceph/Kconfig"
source "fs/cifs/Kconfig"
source "fs/coda/Kconfig"
source "fs/afs/Kconfig"
source "fs/9p/Kconfig"

endif # NETWORK_FILESYSTEMS

source "fs/nls/Kconfig"
source "fs/dlm/Kconfig"
source "fs/unicode/Kconfig"

config IO_WQ
	bool

endmenu
Commit	Line	Data
	1	# SPDX-License-Identifier: GPL-2.0-only
	2	#
	3	# File system configuration
	4	#
	5
	6	menu "File systems"
	7
	8	# Use unaligned word dcache accesses
	9	config DCACHE_WORD_ACCESS
	10	bool
	11
	12	config VALIDATE_FS_PARSER
	13	bool "Validate filesystem parameter description"
	14	help
	15	Enable this to perform validation of the parameter description for a
	16	filesystem when it is registered.
	17
	18	if BLOCK
	19
	20	config FS_IOMAP
	21	bool
	22
	23	source "fs/ext2/Kconfig"
	24	source "fs/ext4/Kconfig"
	25	source "fs/jbd2/Kconfig"
	26
	27	config FS_MBCACHE
	28	# Meta block cache for Extended Attributes (ext2/ext3/ext4)
	29	tristate
	30	default y if EXT2_FS=y && EXT2_FS_XATTR
	31	default y if EXT4_FS=y
	32	default m if EXT2_FS_XATTR \|\| EXT4_FS
	33
	34	source "fs/reiserfs/Kconfig"
	35	source "fs/jfs/Kconfig"
	36
	37	source "fs/xfs/Kconfig"
	38	source "fs/gfs2/Kconfig"
	39	source "fs/ocfs2/Kconfig"
	40	source "fs/btrfs/Kconfig"
	41	source "fs/nilfs2/Kconfig"
	42	source "fs/f2fs/Kconfig"
	43	source "fs/zonefs/Kconfig"
	44
	45	config FS_DAX
	46	bool "Direct Access (DAX) support"
	47	depends on MMU
	48	depends on !(ARM \|\| MIPS \|\| SPARC)
	49	select DEV_PAGEMAP_OPS if (ZONE_DEVICE && !FS_DAX_LIMITED)
	50	select FS_IOMAP
	51	select DAX
	52	help
	53	Direct Access (DAX) can be used on memory-backed block devices.
	54	If the block device supports DAX and the filesystem supports DAX,
	55	then you can avoid using the pagecache to buffer I/Os. Turning
	56	on this option will compile in support for DAX; you will need to
	57	mount the filesystem using the -o dax option.
	58
	59	If you do not have a block device that is capable of using this,
	60	or if unsure, say N. Saying Y will increase the size of the kernel
	61	by about 5kB.
	62
	63	config FS_DAX_PMD
	64	bool
	65	default FS_DAX
	66	depends on FS_DAX
	67	depends on ZONE_DEVICE
	68	depends on TRANSPARENT_HUGEPAGE
	69
	70	# Selected by DAX drivers that do not expect filesystem DAX to support
	71	# get_user_pages() of DAX mappings. I.e. "limited" indicates no support
	72	# for fork() of processes with MAP_SHARED mappings or support for
	73	# direct-I/O to a DAX mapping.
	74	config FS_DAX_LIMITED
	75	bool
	76
	77	endif # BLOCK
	78
	79	# Posix ACL utility routines
	80	#
	81	# Note: Posix ACLs can be implemented without these helpers. Never use
	82	# this symbol for ifdefs in core code.
	83	#
	84	config FS_POSIX_ACL
	85	def_bool n
	86
	87	config EXPORTFS
	88	tristate
	89
	90	config EXPORTFS_BLOCK_OPS
	91	bool "Enable filesystem export operations for block IO"
	92	help
	93	This option enables the export operations for a filesystem to support
	94	external block IO.
	95
	96	config FILE_LOCKING
	97	bool "Enable POSIX file locking API" if EXPERT
	98	default y
	99	help
	100	This option enables standard file locking support, required
	101	for filesystems like NFS and for the flock() system
	102	call. Disabling this option saves about 11k.
	103
	104	config MANDATORY_FILE_LOCKING
	105	bool "Enable Mandatory file locking"
	106	depends on FILE_LOCKING
	107	default y
	108	help
	109	This option enables files appropriately marked files on appropriely
	110	mounted filesystems to support mandatory locking.
	111
	112	To the best of my knowledge this is dead code that no one cares about.
	113
	114	source "fs/crypto/Kconfig"
	115
	116	source "fs/verity/Kconfig"
	117
	118	source "fs/notify/Kconfig"
	119
	120	source "fs/quota/Kconfig"
	121
	122	source "fs/autofs/Kconfig"
	123	source "fs/fuse/Kconfig"
	124	source "fs/overlayfs/Kconfig"
	125
	126	menu "Caches"
	127
	128	source "fs/netfs/Kconfig"
	129	source "fs/fscache/Kconfig"
	130	source "fs/cachefiles/Kconfig"
	131
	132	endmenu
	133
	134	if BLOCK
	135	menu "CD-ROM/DVD Filesystems"
	136
	137	source "fs/isofs/Kconfig"
	138	source "fs/udf/Kconfig"
	139
	140	endmenu
	141	endif # BLOCK
	142
	143	if BLOCK
	144	menu "DOS/FAT/EXFAT/NT Filesystems"
	145
	146	source "fs/fat/Kconfig"
	147	source "fs/exfat/Kconfig"
	148	source "fs/ntfs/Kconfig"
	149
	150	endmenu
	151	endif # BLOCK
	152
	153	menu "Pseudo filesystems"
	154
	155	source "fs/proc/Kconfig"
	156	source "fs/kernfs/Kconfig"
	157	source "fs/sysfs/Kconfig"
	158
	159	config TMPFS
	160	bool "Tmpfs virtual memory file system support (former shm fs)"
	161	depends on SHMEM
	162	help
	163	Tmpfs is a file system which keeps all files in virtual memory.
	164
	165	Everything in tmpfs is temporary in the sense that no files will be
	166	created on your hard drive. The files live in memory and swap
	167	space. If you unmount a tmpfs instance, everything stored therein is
	168	lost.
	169
	170	See <file:Documentation/filesystems/tmpfs.rst> for details.
	171
	172	config TMPFS_POSIX_ACL
	173	bool "Tmpfs POSIX Access Control Lists"
	174	depends on TMPFS
	175	select TMPFS_XATTR
	176	select FS_POSIX_ACL
	177	help
	178	POSIX Access Control Lists (ACLs) support additional access rights
	179	for users and groups beyond the standard owner/group/world scheme,
	180	and this option selects support for ACLs specifically for tmpfs
	181	filesystems.
	182
	183	If you've selected TMPFS, it's possible that you'll also need
	184	this option as there are a number of Linux distros that require
	185	POSIX ACL support under /dev for certain features to work properly.
	186	For example, some distros need this feature for ALSA-related /dev
	187	files for sound to work properly. In short, if you're not sure,
	188	say Y.
	189
	190	config TMPFS_XATTR
	191	bool "Tmpfs extended attributes"
	192	depends on TMPFS
	193	default n
	194	help
	195	Extended attributes are name:value pairs associated with inodes by
	196	the kernel or by users (see the attr(5) manual page for details).
	197
	198	Currently this enables support for the trusted.* and
	199	security.* namespaces.
	200
	201	You need this for POSIX ACL support on tmpfs.
	202
	203	If unsure, say N.
	204
	205	config TMPFS_INODE64
	206	bool "Use 64-bit ino_t by default in tmpfs"
	207	depends on TMPFS && 64BIT
	208	default n
	209	help
	210	tmpfs has historically used only inode numbers as wide as an unsigned
	211	int. In some cases this can cause wraparound, potentially resulting
	212	in multiple files with the same inode number on a single device. This
	213	option makes tmpfs use the full width of ino_t by default, without
	214	needing to specify the inode64 option when mounting.
	215
	216	But if a long-lived tmpfs is to be accessed by 32-bit applications so
	217	ancient that opening a file larger than 2GiB fails with EINVAL, then
	218	the INODE64 config option and inode64 mount option risk operations
	219	failing with EOVERFLOW once 33-bit inode numbers are reached.
	220
	221	To override this configured default, use the inode32 or inode64
	222	option when mounting.
	223
	224	If unsure, say N.
	225
	226	config ARCH_SUPPORTS_HUGETLBFS
	227	def_bool n
	228
	229	config HUGETLBFS
	230	bool "HugeTLB file system support"
	231	depends on X86 \|\| IA64 \|\| SPARC64 \|\| (S390 && 64BIT) \|\| \
	232	ARCH_SUPPORTS_HUGETLBFS \|\| BROKEN
	233	help
	234	hugetlbfs is a filesystem backing for HugeTLB pages, based on
	235	ramfs. For architectures that support it, say Y here and read
	236	<file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
	237
	238	If unsure, say N.
	239
	240	config HUGETLB_PAGE
	241	def_bool HUGETLBFS
	242
	243	config HUGETLB_PAGE_FREE_VMEMMAP
	244	def_bool HUGETLB_PAGE
	245	depends on X86_64
	246	depends on SPARSEMEM_VMEMMAP
	247
	248	config HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON
	249	bool "Default freeing vmemmap pages of HugeTLB to on"
	250	default n
	251	depends on HUGETLB_PAGE_FREE_VMEMMAP
	252	help
	253	When using HUGETLB_PAGE_FREE_VMEMMAP, the freeing unused vmemmap
	254	pages associated with each HugeTLB page is default off. Say Y here
	255	to enable freeing vmemmap pages of HugeTLB by default. It can then
	256	be disabled on the command line via hugetlb_free_vmemmap=off.
	257
	258	config MEMFD_CREATE
	259	def_bool TMPFS \|\| HUGETLBFS
	260
	261	config ARCH_HAS_GIGANTIC_PAGE
	262	bool
	263
	264	source "fs/configfs/Kconfig"
	265	source "fs/efivarfs/Kconfig"
	266
	267	endmenu
	268
	269	menuconfig MISC_FILESYSTEMS
	270	bool "Miscellaneous filesystems"
	271	default y
	272	help
	273	Say Y here to get to see options for various miscellaneous
	274	filesystems, such as filesystems that came from other
	275	operating systems.
	276
	277	This option alone does not add any kernel code.
	278
	279	If you say N, all options in this submenu will be skipped and
	280	disabled; if unsure, say Y here.
	281
	282	if MISC_FILESYSTEMS
	283
	284	source "fs/orangefs/Kconfig"
	285	source "fs/adfs/Kconfig"
	286	source "fs/affs/Kconfig"
	287	source "fs/ecryptfs/Kconfig"
	288	source "fs/hfs/Kconfig"
	289	source "fs/hfsplus/Kconfig"
	290	source "fs/befs/Kconfig"
	291	source "fs/bfs/Kconfig"
	292	source "fs/efs/Kconfig"
	293	source "fs/jffs2/Kconfig"
	294	# UBIFS File system configuration
	295	source "fs/ubifs/Kconfig"
	296	source "fs/cramfs/Kconfig"
	297	source "fs/squashfs/Kconfig"
	298	source "fs/freevxfs/Kconfig"
	299	source "fs/minix/Kconfig"
	300	source "fs/omfs/Kconfig"
	301	source "fs/hpfs/Kconfig"
	302	source "fs/qnx4/Kconfig"
	303	source "fs/qnx6/Kconfig"
	304	source "fs/romfs/Kconfig"
	305	source "fs/pstore/Kconfig"
	306	source "fs/sysv/Kconfig"
	307	source "fs/ufs/Kconfig"
	308	source "fs/erofs/Kconfig"
	309	source "fs/vboxsf/Kconfig"
	310
	311	endif # MISC_FILESYSTEMS
	312
	313	menuconfig NETWORK_FILESYSTEMS
	314	bool "Network File Systems"
	315	default y
	316	depends on NET
	317	help
	318	Say Y here to get to see options for network filesystems and
	319	filesystem-related networking code, such as NFS daemon and
	320	RPCSEC security modules.
	321
	322	This option alone does not add any kernel code.
	323
	324	If you say N, all options in this submenu will be skipped and
	325	disabled; if unsure, say Y here.
	326
	327	if NETWORK_FILESYSTEMS
	328
	329	source "fs/nfs/Kconfig"
	330	source "fs/nfsd/Kconfig"
	331
	332	config GRACE_PERIOD
	333	tristate
	334
	335	config LOCKD
	336	tristate
	337	depends on FILE_LOCKING
	338	select GRACE_PERIOD
	339
	340	config LOCKD_V4
	341	bool
	342	depends on NFSD_V3 \|\| NFS_V3
	343	depends on FILE_LOCKING
	344	default y
	345
	346	config NFS_ACL_SUPPORT
	347	tristate
	348	select FS_POSIX_ACL
	349
	350	config NFS_COMMON
	351	bool
	352	depends on NFSD \|\| NFS_FS \|\| LOCKD
	353	default y
	354
	355	config NFS_V4_2_SSC_HELPER
	356	bool
	357	default y if NFS_V4_2
	358
	359	source "net/sunrpc/Kconfig"
	360	source "fs/ceph/Kconfig"
	361	source "fs/cifs/Kconfig"
	362	source "fs/coda/Kconfig"
	363	source "fs/afs/Kconfig"
	364	source "fs/9p/Kconfig"
	365
	366	endif # NETWORK_FILESYSTEMS
	367
	368	source "fs/nls/Kconfig"
	369	source "fs/dlm/Kconfig"
	370	source "fs/unicode/Kconfig"
	371
	372	config IO_WQ
	373	bool
	374
	375	endmenu