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"
43source "fs/zonefs/Kconfig"
44
45config 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
63config 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.
74config FS_DAX_LIMITED
75	bool
76
77endif # 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#
84config FS_POSIX_ACL
85	def_bool n
86
87config EXPORTFS
88	tristate
89
90config 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
96config 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
104config 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
114source "fs/crypto/Kconfig"
115
116source "fs/verity/Kconfig"
117
118source "fs/notify/Kconfig"
119
120source "fs/quota/Kconfig"
121
122source "fs/autofs/Kconfig"
123source "fs/fuse/Kconfig"
124source "fs/overlayfs/Kconfig"
125
126menu "Caches"
127
128source "fs/netfs/Kconfig"
129source "fs/fscache/Kconfig"
130source "fs/cachefiles/Kconfig"
131
132endmenu
133
134if BLOCK
135menu "CD-ROM/DVD Filesystems"
136
137source "fs/isofs/Kconfig"
138source "fs/udf/Kconfig"
139
140endmenu
141endif # BLOCK
142
143if BLOCK
144menu "DOS/FAT/EXFAT/NT Filesystems"
145
146source "fs/fat/Kconfig"
147source "fs/exfat/Kconfig"
148source "fs/ntfs/Kconfig"
149
150endmenu
151endif # BLOCK
152
153menu "Pseudo filesystems"
154
155source "fs/proc/Kconfig"
156source "fs/kernfs/Kconfig"
157source "fs/sysfs/Kconfig"
158
159config 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
172config 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
190config 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
205config 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
226config ARCH_SUPPORTS_HUGETLBFS
227	def_bool n
228
229config 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
240config HUGETLB_PAGE
241	def_bool HUGETLBFS
242
243config MEMFD_CREATE
244	def_bool TMPFS || HUGETLBFS
245
246config ARCH_HAS_GIGANTIC_PAGE
247	bool
248
249source "fs/configfs/Kconfig"
250source "fs/efivarfs/Kconfig"
251
252endmenu
253
254menuconfig MISC_FILESYSTEMS
255	bool "Miscellaneous filesystems"
256	default y
257	help
258	  Say Y here to get to see options for various miscellaneous
259	  filesystems, such as filesystems that came from other
260	  operating systems.
261
262	  This option alone does not add any kernel code.
263
264	  If you say N, all options in this submenu will be skipped and
265	  disabled; if unsure, say Y here.
266
267if MISC_FILESYSTEMS
268
269source "fs/orangefs/Kconfig"
270source "fs/adfs/Kconfig"
271source "fs/affs/Kconfig"
272source "fs/ecryptfs/Kconfig"
273source "fs/hfs/Kconfig"
274source "fs/hfsplus/Kconfig"
275source "fs/befs/Kconfig"
276source "fs/bfs/Kconfig"
277source "fs/efs/Kconfig"
278source "fs/jffs2/Kconfig"
279# UBIFS File system configuration
280source "fs/ubifs/Kconfig"
281source "fs/cramfs/Kconfig"
282source "fs/squashfs/Kconfig"
283source "fs/freevxfs/Kconfig"
284source "fs/minix/Kconfig"
285source "fs/omfs/Kconfig"
286source "fs/hpfs/Kconfig"
287source "fs/qnx4/Kconfig"
288source "fs/qnx6/Kconfig"
289source "fs/romfs/Kconfig"
290source "fs/pstore/Kconfig"
291source "fs/sysv/Kconfig"
292source "fs/ufs/Kconfig"
293source "fs/erofs/Kconfig"
294source "fs/vboxsf/Kconfig"
295
296endif # MISC_FILESYSTEMS
297
298menuconfig NETWORK_FILESYSTEMS
299	bool "Network File Systems"
300	default y
301	depends on NET
302	help
303	  Say Y here to get to see options for network filesystems and
304	  filesystem-related networking code, such as NFS daemon and
305	  RPCSEC security modules.
306
307	  This option alone does not add any kernel code.
308
309	  If you say N, all options in this submenu will be skipped and
310	  disabled; if unsure, say Y here.
311
312if NETWORK_FILESYSTEMS
313
314source "fs/nfs/Kconfig"
315source "fs/nfsd/Kconfig"
316
317config GRACE_PERIOD
318	tristate
319
320config LOCKD
321	tristate
322	depends on FILE_LOCKING
323	select GRACE_PERIOD
324
325config LOCKD_V4
326	bool
327	depends on NFSD_V3 || NFS_V3
328	depends on FILE_LOCKING
329	default y
330
331config NFS_ACL_SUPPORT
332	tristate
333	select FS_POSIX_ACL
334
335config NFS_COMMON
336	bool
337	depends on NFSD || NFS_FS || LOCKD
338	default y
339
340config NFS_V4_2_SSC_HELPER
341	bool
342	default y if NFS_V4_2
343
344source "net/sunrpc/Kconfig"
345source "fs/ceph/Kconfig"
346source "fs/cifs/Kconfig"
347source "fs/coda/Kconfig"
348source "fs/afs/Kconfig"
349source "fs/9p/Kconfig"
350
351endif # NETWORK_FILESYSTEMS
352
353source "fs/nls/Kconfig"
354source "fs/dlm/Kconfig"
355source "fs/unicode/Kconfig"
356
357config IO_WQ
358	bool
359
360endmenu
361