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
18config FS_IOMAP
19	bool
20
21# Stackable filesystems
22config FS_STACK
23	bool
24
25config BUFFER_HEAD
26	bool
27
28# old blockdev_direct_IO implementation.  Use iomap for new code instead
29config LEGACY_DIRECT_IO
30	depends on BUFFER_HEAD
31	bool
32
33if BLOCK
34
35source "fs/ext2/Kconfig"
36source "fs/ext4/Kconfig"
37source "fs/jbd2/Kconfig"
38
39config FS_MBCACHE
40# Meta block cache for Extended Attributes (ext2/ext3/ext4)
41	tristate
42	default y if EXT2_FS=y && EXT2_FS_XATTR
43	default y if EXT4_FS=y
44	default m if EXT2_FS_XATTR || EXT4_FS
45
46source "fs/reiserfs/Kconfig"
47source "fs/jfs/Kconfig"
48
49source "fs/xfs/Kconfig"
50source "fs/gfs2/Kconfig"
51source "fs/ocfs2/Kconfig"
52source "fs/btrfs/Kconfig"
53source "fs/nilfs2/Kconfig"
54source "fs/f2fs/Kconfig"
55source "fs/bcachefs/Kconfig"
56source "fs/zonefs/Kconfig"
57
58endif # BLOCK
59
60config FS_DAX
61	bool "File system based Direct Access (DAX) support"
62	depends on MMU
63	depends on ZONE_DEVICE || FS_DAX_LIMITED
64	select FS_IOMAP
65	select DAX
66	help
67	  Direct Access (DAX) can be used on memory-backed block devices.
68	  If the block device supports DAX and the filesystem supports DAX,
69	  then you can avoid using the pagecache to buffer I/Os.  Turning
70	  on this option will compile in support for DAX.
71
72	  For a DAX device to support file system access it needs to have
73	  struct pages.  For the nfit based NVDIMMs this can be enabled
74	  using the ndctl utility:
75
76		# ndctl create-namespace --force --reconfig=namespace0.0 \
77			--mode=fsdax --map=mem
78
79	  See the 'create-namespace' man page for details on the overhead of
80	  --map=mem:
81	  https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace
82
83          For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most
84	  file systems DAX support needs to be manually enabled globally or
85	  per-inode using a mount option as well.  See the file documentation in
86	  Documentation/filesystems/dax.rst for details.
87
88	  If you do not have a block device that is capable of using this,
89	  or if unsure, say N.  Saying Y will increase the size of the kernel
90	  by about 5kB.
91
92config FS_DAX_PMD
93	bool
94	default FS_DAX
95	depends on FS_DAX
96	depends on ZONE_DEVICE
97	depends on TRANSPARENT_HUGEPAGE
98
99# Selected by DAX drivers that do not expect filesystem DAX to support
100# get_user_pages() of DAX mappings. I.e. "limited" indicates no support
101# for fork() of processes with MAP_SHARED mappings or support for
102# direct-I/O to a DAX mapping.
103config FS_DAX_LIMITED
104	bool
105
106# Posix ACL utility routines
107#
108# Note: Posix ACLs can be implemented without these helpers.  Never use
109# this symbol for ifdefs in core code.
110#
111config FS_POSIX_ACL
112	def_bool n
113
114config EXPORTFS
115	tristate
116
117config EXPORTFS_BLOCK_OPS
118	bool "Enable filesystem export operations for block IO"
119	help
120	  This option enables the export operations for a filesystem to support
121	  external block IO.
122
123config FILE_LOCKING
124	bool "Enable POSIX file locking API" if EXPERT
125	default y
126	help
127	  This option enables standard file locking support, required
128          for filesystems like NFS and for the flock() system
129          call. Disabling this option saves about 11k.
130
131source "fs/crypto/Kconfig"
132
133source "fs/verity/Kconfig"
134
135source "fs/notify/Kconfig"
136
137source "fs/quota/Kconfig"
138
139source "fs/autofs/Kconfig"
140source "fs/fuse/Kconfig"
141source "fs/overlayfs/Kconfig"
142
143menu "Caches"
144
145source "fs/netfs/Kconfig"
146source "fs/cachefiles/Kconfig"
147
148endmenu
149
150if BLOCK
151menu "CD-ROM/DVD Filesystems"
152
153source "fs/isofs/Kconfig"
154source "fs/udf/Kconfig"
155
156endmenu
157endif # BLOCK
158
159if BLOCK
160menu "DOS/FAT/EXFAT/NT Filesystems"
161
162source "fs/fat/Kconfig"
163source "fs/exfat/Kconfig"
164source "fs/ntfs3/Kconfig"
165
166endmenu
167endif # BLOCK
168
169menu "Pseudo filesystems"
170
171source "fs/proc/Kconfig"
172source "fs/kernfs/Kconfig"
173source "fs/sysfs/Kconfig"
174
175config TMPFS
176	bool "Tmpfs virtual memory file system support (former shm fs)"
177	depends on SHMEM
178	select MEMFD_CREATE
179	help
180	  Tmpfs is a file system which keeps all files in virtual memory.
181
182	  Everything in tmpfs is temporary in the sense that no files will be
183	  created on your hard drive. The files live in memory and swap
184	  space. If you unmount a tmpfs instance, everything stored therein is
185	  lost.
186
187	  See <file:Documentation/filesystems/tmpfs.rst> for details.
188
189config TMPFS_POSIX_ACL
190	bool "Tmpfs POSIX Access Control Lists"
191	depends on TMPFS
192	select TMPFS_XATTR
193	select FS_POSIX_ACL
194	help
195	  POSIX Access Control Lists (ACLs) support additional access rights
196	  for users and groups beyond the standard owner/group/world scheme,
197	  and this option selects support for ACLs specifically for tmpfs
198	  filesystems.
199
200	  If you've selected TMPFS, it's possible that you'll also need
201	  this option as there are a number of Linux distros that require
202	  POSIX ACL support under /dev for certain features to work properly.
203	  For example, some distros need this feature for ALSA-related /dev
204	  files for sound to work properly.  In short, if you're not sure,
205	  say Y.
206
207config TMPFS_XATTR
208	bool "Tmpfs extended attributes"
209	depends on TMPFS
210	default n
211	help
212	  Extended attributes are name:value pairs associated with inodes by
213	  the kernel or by users (see the attr(5) manual page for details).
214
215	  This enables support for the trusted.*, security.* and user.*
216	  namespaces.
217
218	  You need this for POSIX ACL support on tmpfs.
219
220	  If unsure, say N.
221
222config TMPFS_INODE64
223	bool "Use 64-bit ino_t by default in tmpfs"
224	depends on TMPFS && 64BIT
225	default n
226	help
227	  tmpfs has historically used only inode numbers as wide as an unsigned
228	  int. In some cases this can cause wraparound, potentially resulting
229	  in multiple files with the same inode number on a single device. This
230	  option makes tmpfs use the full width of ino_t by default, without
231	  needing to specify the inode64 option when mounting.
232
233	  But if a long-lived tmpfs is to be accessed by 32-bit applications so
234	  ancient that opening a file larger than 2GiB fails with EINVAL, then
235	  the INODE64 config option and inode64 mount option risk operations
236	  failing with EOVERFLOW once 33-bit inode numbers are reached.
237
238	  To override this configured default, use the inode32 or inode64
239	  option when mounting.
240
241	  If unsure, say N.
242
243config TMPFS_QUOTA
244	bool "Tmpfs quota support"
245	depends on TMPFS
246	select QUOTA
247	help
248	  Quota support allows to set per user and group limits for tmpfs
249	  usage.  Say Y to enable quota support. Once enabled you can control
250	  user and group quota enforcement with quota, usrquota and grpquota
251	  mount options.
252
253	  If unsure, say N.
254
255config ARCH_SUPPORTS_HUGETLBFS
256	def_bool n
257
258menuconfig HUGETLBFS
259	bool "HugeTLB file system support"
260	depends on X86 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN
261	depends on (SYSFS || SYSCTL)
262	select MEMFD_CREATE
263	select PADATA if SMP
264	help
265	  hugetlbfs is a filesystem backing for HugeTLB pages, based on
266	  ramfs. For architectures that support it, say Y here and read
267	  <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
268
269	  If unsure, say N.
270
271if HUGETLBFS
272config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
273	bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"
274	default n
275	depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP
276	help
277	  The HugeTLB Vmemmap Optimization (HVO) defaults to off. Say Y here to
278	  enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off
279	  (boot command line) or hugetlb_optimize_vmemmap (sysctl).
280endif # HUGETLBFS
281
282config HUGETLB_PAGE
283	def_bool HUGETLBFS
284	select XARRAY_MULTI
285
286config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
287	def_bool HUGETLB_PAGE
288	depends on ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
289	depends on SPARSEMEM_VMEMMAP
290
291config ARCH_HAS_GIGANTIC_PAGE
292	bool
293
294source "fs/configfs/Kconfig"
295source "fs/efivarfs/Kconfig"
296
297endmenu
298
299menuconfig MISC_FILESYSTEMS
300	bool "Miscellaneous filesystems"
301	default y
302	help
303	  Say Y here to get to see options for various miscellaneous
304	  filesystems, such as filesystems that came from other
305	  operating systems.
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 MISC_FILESYSTEMS
313
314source "fs/orangefs/Kconfig"
315source "fs/adfs/Kconfig"
316source "fs/affs/Kconfig"
317source "fs/ecryptfs/Kconfig"
318source "fs/hfs/Kconfig"
319source "fs/hfsplus/Kconfig"
320source "fs/befs/Kconfig"
321source "fs/bfs/Kconfig"
322source "fs/efs/Kconfig"
323source "fs/jffs2/Kconfig"
324# UBIFS File system configuration
325source "fs/ubifs/Kconfig"
326source "fs/cramfs/Kconfig"
327source "fs/squashfs/Kconfig"
328source "fs/freevxfs/Kconfig"
329source "fs/minix/Kconfig"
330source "fs/omfs/Kconfig"
331source "fs/hpfs/Kconfig"
332source "fs/qnx4/Kconfig"
333source "fs/qnx6/Kconfig"
334source "fs/romfs/Kconfig"
335source "fs/pstore/Kconfig"
336source "fs/sysv/Kconfig"
337source "fs/ufs/Kconfig"
338source "fs/erofs/Kconfig"
339source "fs/vboxsf/Kconfig"
340
341endif # MISC_FILESYSTEMS
342
343menuconfig NETWORK_FILESYSTEMS
344	bool "Network File Systems"
345	default y
346	depends on NET
347	help
348	  Say Y here to get to see options for network filesystems and
349	  filesystem-related networking code, such as NFS daemon and
350	  RPCSEC security modules.
351
352	  This option alone does not add any kernel code.
353
354	  If you say N, all options in this submenu will be skipped and
355	  disabled; if unsure, say Y here.
356
357if NETWORK_FILESYSTEMS
358
359source "fs/nfs/Kconfig"
360source "fs/nfsd/Kconfig"
361
362config GRACE_PERIOD
363	tristate
364
365config LOCKD
366	tristate
367	depends on FILE_LOCKING
368	select GRACE_PERIOD
369
370config LOCKD_V4
371	bool
372	depends on NFSD || NFS_V3
373	depends on FILE_LOCKING
374	default y
375
376config NFS_ACL_SUPPORT
377	tristate
378	select FS_POSIX_ACL
379
380config NFS_COMMON
381	bool
382	depends on NFSD || NFS_FS || LOCKD
383	default y
384
385config NFS_V4_2_SSC_HELPER
386	bool
387	default y if NFS_V4_2
388
389source "net/sunrpc/Kconfig"
390source "fs/ceph/Kconfig"
391
392source "fs/smb/Kconfig"
393source "fs/coda/Kconfig"
394source "fs/afs/Kconfig"
395source "fs/9p/Kconfig"
396
397endif # NETWORK_FILESYSTEMS
398
399source "fs/nls/Kconfig"
400source "fs/dlm/Kconfig"
401source "fs/unicode/Kconfig"
402
403config IO_WQ
404	bool
405
406endmenu
407