xref: /linux/fs/Kconfig (revision 9a6b55ac) 
1# SPDX-License-Identifier: GPL-2.0-only
2#
3# File system configuration
4#
5
6menu "File systems"
7
8# Use unaligned word dcache accesses
9config DCACHE_WORD_ACCESS
10       bool
11
12config 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
18if BLOCK
19
20config FS_IOMAP
21	bool
22
23source "fs/ext2/Kconfig"
24source "fs/ext4/Kconfig"
25source "fs/jbd2/Kconfig"
26
27config 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
34source "fs/reiserfs/Kconfig"
35source "fs/jfs/Kconfig"
36
37source "fs/xfs/Kconfig"
38source "fs/gfs2/Kconfig"
39source "fs/ocfs2/Kconfig"
40source "fs/btrfs/Kconfig"
41source "fs/nilfs2/Kconfig"
42source "fs/f2fs/Kconfig"
43
44config FS_DAX
45	bool "Direct Access (DAX) support"
46	depends on MMU
47	depends on !(ARM || MIPS || SPARC)
48	select DEV_PAGEMAP_OPS if (ZONE_DEVICE && !FS_DAX_LIMITED)
49	select FS_IOMAP
50	select DAX
51	help
52	  Direct Access (DAX) can be used on memory-backed block devices.
53	  If the block device supports DAX and the filesystem supports DAX,
54	  then you can avoid using the pagecache to buffer I/Os.  Turning
55	  on this option will compile in support for DAX; you will need to
56	  mount the filesystem using the -o dax option.
57
58	  If you do not have a block device that is capable of using this,
59	  or if unsure, say N.  Saying Y will increase the size of the kernel
60	  by about 5kB.
61
62config FS_DAX_PMD
63	bool
64	default FS_DAX
65	depends on FS_DAX
66	depends on ZONE_DEVICE
67	depends on TRANSPARENT_HUGEPAGE
68
69# Selected by DAX drivers that do not expect filesystem DAX to support
70# get_user_pages() of DAX mappings. I.e. "limited" indicates no support
71# for fork() of processes with MAP_SHARED mappings or support for
72# direct-I/O to a DAX mapping.
73config FS_DAX_LIMITED
74	bool
75
76endif # BLOCK
77
78# Posix ACL utility routines
79#
80# Note: Posix ACLs can be implemented without these helpers.  Never use
81# this symbol for ifdefs in core code.
82#
83config FS_POSIX_ACL
84	def_bool n
85
86config EXPORTFS
87	tristate
88
89config EXPORTFS_BLOCK_OPS
90	bool "Enable filesystem export operations for block IO"
91	help
92	  This option enables the export operations for a filesystem to support
93	  external block IO.
94
95config FILE_LOCKING
96	bool "Enable POSIX file locking API" if EXPERT
97	default y
98	help
99	  This option enables standard file locking support, required
100          for filesystems like NFS and for the flock() system
101          call. Disabling this option saves about 11k.
102
103config MANDATORY_FILE_LOCKING
104	bool "Enable Mandatory file locking"
105	depends on FILE_LOCKING
106	default y
107	help
108	  This option enables files appropriately marked files on appropriely
109	  mounted filesystems to support mandatory locking.
110
111	  To the best of my knowledge this is dead code that no one cares about.
112
113source "fs/crypto/Kconfig"
114
115source "fs/verity/Kconfig"
116
117source "fs/notify/Kconfig"
118
119source "fs/quota/Kconfig"
120
121source "fs/autofs/Kconfig"
122source "fs/fuse/Kconfig"
123source "fs/overlayfs/Kconfig"
124
125menu "Caches"
126
127source "fs/fscache/Kconfig"
128source "fs/cachefiles/Kconfig"
129
130endmenu
131
132if BLOCK
133menu "CD-ROM/DVD Filesystems"
134
135source "fs/isofs/Kconfig"
136source "fs/udf/Kconfig"
137
138endmenu
139endif # BLOCK
140
141if BLOCK
142menu "DOS/FAT/NT Filesystems"
143
144source "fs/fat/Kconfig"
145source "fs/ntfs/Kconfig"
146
147endmenu
148endif # BLOCK
149
150menu "Pseudo filesystems"
151
152source "fs/proc/Kconfig"
153source "fs/kernfs/Kconfig"
154source "fs/sysfs/Kconfig"
155
156config TMPFS
157	bool "Tmpfs virtual memory file system support (former shm fs)"
158	depends on SHMEM
159	help
160	  Tmpfs is a file system which keeps all files in virtual memory.
161
162	  Everything in tmpfs is temporary in the sense that no files will be
163	  created on your hard drive. The files live in memory and swap
164	  space. If you unmount a tmpfs instance, everything stored therein is
165	  lost.
166
167	  See <file:Documentation/filesystems/tmpfs.txt> for details.
168
169config TMPFS_POSIX_ACL
170	bool "Tmpfs POSIX Access Control Lists"
171	depends on TMPFS
172	select TMPFS_XATTR
173	select FS_POSIX_ACL
174	help
175	  POSIX Access Control Lists (ACLs) support additional access rights
176	  for users and groups beyond the standard owner/group/world scheme,
177	  and this option selects support for ACLs specifically for tmpfs
178	  filesystems.
179
180	  If you've selected TMPFS, it's possible that you'll also need
181	  this option as there are a number of Linux distros that require
182	  POSIX ACL support under /dev for certain features to work properly.
183	  For example, some distros need this feature for ALSA-related /dev
184	  files for sound to work properly.  In short, if you're not sure,
185	  say Y.
186
187config TMPFS_XATTR
188	bool "Tmpfs extended attributes"
189	depends on TMPFS
190	default n
191	help
192	  Extended attributes are name:value pairs associated with inodes by
193	  the kernel or by users (see the attr(5) manual page for details).
194
195	  Currently this enables support for the trusted.* and
196	  security.* namespaces.
197
198	  You need this for POSIX ACL support on tmpfs.
199
200	  If unsure, say N.
201
202config HUGETLBFS
203	bool "HugeTLB file system support"
204	depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
205		   SYS_SUPPORTS_HUGETLBFS || BROKEN
206	help
207	  hugetlbfs is a filesystem backing for HugeTLB pages, based on
208	  ramfs. For architectures that support it, say Y here and read
209	  <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
210
211	  If unsure, say N.
212
213config HUGETLB_PAGE
214	def_bool HUGETLBFS
215
216config MEMFD_CREATE
217	def_bool TMPFS || HUGETLBFS
218
219config ARCH_HAS_GIGANTIC_PAGE
220	bool
221
222source "fs/configfs/Kconfig"
223source "fs/efivarfs/Kconfig"
224
225endmenu
226
227menuconfig MISC_FILESYSTEMS
228	bool "Miscellaneous filesystems"
229	default y
230	---help---
231	  Say Y here to get to see options for various miscellaneous
232	  filesystems, such as filesystems that came from other
233	  operating systems.
234
235	  This option alone does not add any kernel code.
236
237	  If you say N, all options in this submenu will be skipped and
238	  disabled; if unsure, say Y here.
239
240if MISC_FILESYSTEMS
241
242source "fs/orangefs/Kconfig"
243source "fs/adfs/Kconfig"
244source "fs/affs/Kconfig"
245source "fs/ecryptfs/Kconfig"
246source "fs/hfs/Kconfig"
247source "fs/hfsplus/Kconfig"
248source "fs/befs/Kconfig"
249source "fs/bfs/Kconfig"
250source "fs/efs/Kconfig"
251source "fs/jffs2/Kconfig"
252# UBIFS File system configuration
253source "fs/ubifs/Kconfig"
254source "fs/cramfs/Kconfig"
255source "fs/squashfs/Kconfig"
256source "fs/freevxfs/Kconfig"
257source "fs/minix/Kconfig"
258source "fs/omfs/Kconfig"
259source "fs/hpfs/Kconfig"
260source "fs/qnx4/Kconfig"
261source "fs/qnx6/Kconfig"
262source "fs/romfs/Kconfig"
263source "fs/pstore/Kconfig"
264source "fs/sysv/Kconfig"
265source "fs/ufs/Kconfig"
266source "fs/erofs/Kconfig"
267
268endif # MISC_FILESYSTEMS
269
270menuconfig NETWORK_FILESYSTEMS
271	bool "Network File Systems"
272	default y
273	depends on NET
274	---help---
275	  Say Y here to get to see options for network filesystems and
276	  filesystem-related networking code, such as NFS daemon and
277	  RPCSEC security modules.
278
279	  This option alone does not add any kernel code.
280
281	  If you say N, all options in this submenu will be skipped and
282	  disabled; if unsure, say Y here.
283
284if NETWORK_FILESYSTEMS
285
286source "fs/nfs/Kconfig"
287source "fs/nfsd/Kconfig"
288
289config GRACE_PERIOD
290	tristate
291
292config LOCKD
293	tristate
294	depends on FILE_LOCKING
295	select GRACE_PERIOD
296
297config LOCKD_V4
298	bool
299	depends on NFSD_V3 || NFS_V3
300	depends on FILE_LOCKING
301	default y
302
303config NFS_ACL_SUPPORT
304	tristate
305	select FS_POSIX_ACL
306
307config NFS_COMMON
308	bool
309	depends on NFSD || NFS_FS || LOCKD
310	default y
311
312source "net/sunrpc/Kconfig"
313source "fs/ceph/Kconfig"
314source "fs/cifs/Kconfig"
315source "fs/coda/Kconfig"
316source "fs/afs/Kconfig"
317source "fs/9p/Kconfig"
318
319endif # NETWORK_FILESYSTEMS
320
321source "fs/nls/Kconfig"
322source "fs/dlm/Kconfig"
323source "fs/unicode/Kconfig"
324
325config IO_WQ
326	bool
327
328endmenu
329