xref: /openbmc/linux/fs/Kconfig (revision 2f0754f2) 
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
21if BLOCK
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
45endif # BLOCK
46
47config FS_DAX
48	bool "File system based Direct Access (DAX) support"
49	depends on MMU
50	depends on !(ARM || MIPS || SPARC)
51	select DEV_PAGEMAP_OPS if (ZONE_DEVICE && !FS_DAX_LIMITED)
52	select FS_IOMAP
53	select DAX
54	help
55	  Direct Access (DAX) can be used on memory-backed block devices.
56	  If the block device supports DAX and the filesystem supports DAX,
57	  then you can avoid using the pagecache to buffer I/Os.  Turning
58	  on this option will compile in support for DAX.
59
60	  For a DAX device to support file system access it needs to have
61	  struct pages.  For the nfit based NVDIMMs this can be enabled
62	  using the ndctl utility:
63
64		# ndctl create-namespace --force --reconfig=namespace0.0 \
65			--mode=fsdax --map=mem
66
67	  See the 'create-namespace' man page for details on the overhead of
68	  --map=mem:
69	  https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace
70
71          For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most
72	  file systems DAX support needs to be manually enabled globally or
73	  per-inode using a mount option as well.  See the file documentation in
74	  Documentation/filesystems/dax.rst for details.
75
76	  If you do not have a block device that is capable of using this,
77	  or if unsure, say N.  Saying Y will increase the size of the kernel
78	  by about 5kB.
79
80config FS_DAX_PMD
81	bool
82	default FS_DAX
83	depends on FS_DAX
84	depends on ZONE_DEVICE
85	depends on TRANSPARENT_HUGEPAGE
86
87# Selected by DAX drivers that do not expect filesystem DAX to support
88# get_user_pages() of DAX mappings. I.e. "limited" indicates no support
89# for fork() of processes with MAP_SHARED mappings or support for
90# direct-I/O to a DAX mapping.
91config FS_DAX_LIMITED
92	bool
93
94# Posix ACL utility routines
95#
96# Note: Posix ACLs can be implemented without these helpers.  Never use
97# this symbol for ifdefs in core code.
98#
99config FS_POSIX_ACL
100	def_bool n
101
102config EXPORTFS
103	tristate
104
105config EXPORTFS_BLOCK_OPS
106	bool "Enable filesystem export operations for block IO"
107	help
108	  This option enables the export operations for a filesystem to support
109	  external block IO.
110
111config FILE_LOCKING
112	bool "Enable POSIX file locking API" if EXPERT
113	default y
114	help
115	  This option enables standard file locking support, required
116          for filesystems like NFS and for the flock() system
117          call. Disabling this option saves about 11k.
118
119source "fs/crypto/Kconfig"
120
121source "fs/verity/Kconfig"
122
123source "fs/notify/Kconfig"
124
125source "fs/quota/Kconfig"
126
127source "fs/autofs/Kconfig"
128source "fs/fuse/Kconfig"
129source "fs/overlayfs/Kconfig"
130
131menu "Caches"
132
133source "fs/netfs/Kconfig"
134source "fs/fscache/Kconfig"
135source "fs/cachefiles/Kconfig"
136
137endmenu
138
139if BLOCK
140menu "CD-ROM/DVD Filesystems"
141
142source "fs/isofs/Kconfig"
143source "fs/udf/Kconfig"
144
145endmenu
146endif # BLOCK
147
148if BLOCK
149menu "DOS/FAT/EXFAT/NT Filesystems"
150
151source "fs/fat/Kconfig"
152source "fs/exfat/Kconfig"
153source "fs/ntfs/Kconfig"
154source "fs/ntfs3/Kconfig"
155
156endmenu
157endif # BLOCK
158
159menu "Pseudo filesystems"
160
161source "fs/proc/Kconfig"
162source "fs/kernfs/Kconfig"
163source "fs/sysfs/Kconfig"
164
165config TMPFS
166	bool "Tmpfs virtual memory file system support (former shm fs)"
167	depends on SHMEM
168	help
169	  Tmpfs is a file system which keeps all files in virtual memory.
170
171	  Everything in tmpfs is temporary in the sense that no files will be
172	  created on your hard drive. The files live in memory and swap
173	  space. If you unmount a tmpfs instance, everything stored therein is
174	  lost.
175
176	  See <file:Documentation/filesystems/tmpfs.rst> for details.
177
178config TMPFS_POSIX_ACL
179	bool "Tmpfs POSIX Access Control Lists"
180	depends on TMPFS
181	select TMPFS_XATTR
182	select FS_POSIX_ACL
183	help
184	  POSIX Access Control Lists (ACLs) support additional access rights
185	  for users and groups beyond the standard owner/group/world scheme,
186	  and this option selects support for ACLs specifically for tmpfs
187	  filesystems.
188
189	  If you've selected TMPFS, it's possible that you'll also need
190	  this option as there are a number of Linux distros that require
191	  POSIX ACL support under /dev for certain features to work properly.
192	  For example, some distros need this feature for ALSA-related /dev
193	  files for sound to work properly.  In short, if you're not sure,
194	  say Y.
195
196config TMPFS_XATTR
197	bool "Tmpfs extended attributes"
198	depends on TMPFS
199	default n
200	help
201	  Extended attributes are name:value pairs associated with inodes by
202	  the kernel or by users (see the attr(5) manual page for details).
203
204	  Currently this enables support for the trusted.* and
205	  security.* namespaces.
206
207	  You need this for POSIX ACL support on tmpfs.
208
209	  If unsure, say N.
210
211config TMPFS_INODE64
212	bool "Use 64-bit ino_t by default in tmpfs"
213	depends on TMPFS && 64BIT
214	default n
215	help
216	  tmpfs has historically used only inode numbers as wide as an unsigned
217	  int. In some cases this can cause wraparound, potentially resulting
218	  in multiple files with the same inode number on a single device. This
219	  option makes tmpfs use the full width of ino_t by default, without
220	  needing to specify the inode64 option when mounting.
221
222	  But if a long-lived tmpfs is to be accessed by 32-bit applications so
223	  ancient that opening a file larger than 2GiB fails with EINVAL, then
224	  the INODE64 config option and inode64 mount option risk operations
225	  failing with EOVERFLOW once 33-bit inode numbers are reached.
226
227	  To override this configured default, use the inode32 or inode64
228	  option when mounting.
229
230	  If unsure, say N.
231
232config ARCH_SUPPORTS_HUGETLBFS
233	def_bool n
234
235config HUGETLBFS
236	bool "HugeTLB file system support"
237	depends on X86 || IA64 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN
238	help
239	  hugetlbfs is a filesystem backing for HugeTLB pages, based on
240	  ramfs. For architectures that support it, say Y here and read
241	  <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
242
243	  If unsure, say N.
244
245config HUGETLB_PAGE
246	def_bool HUGETLBFS
247
248config HUGETLB_PAGE_FREE_VMEMMAP
249	def_bool HUGETLB_PAGE
250	depends on X86_64
251	depends on SPARSEMEM_VMEMMAP
252
253config HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON
254	bool "Default freeing vmemmap pages of HugeTLB to on"
255	default n
256	depends on HUGETLB_PAGE_FREE_VMEMMAP
257	help
258	  When using HUGETLB_PAGE_FREE_VMEMMAP, the freeing unused vmemmap
259	  pages associated with each HugeTLB page is default off. Say Y here
260	  to enable freeing vmemmap pages of HugeTLB by default. It can then
261	  be disabled on the command line via hugetlb_free_vmemmap=off.
262
263config MEMFD_CREATE
264	def_bool TMPFS || HUGETLBFS
265
266config ARCH_HAS_GIGANTIC_PAGE
267	bool
268
269source "fs/configfs/Kconfig"
270source "fs/efivarfs/Kconfig"
271
272endmenu
273
274menuconfig MISC_FILESYSTEMS
275	bool "Miscellaneous filesystems"
276	default y
277	help
278	  Say Y here to get to see options for various miscellaneous
279	  filesystems, such as filesystems that came from other
280	  operating systems.
281
282	  This option alone does not add any kernel code.
283
284	  If you say N, all options in this submenu will be skipped and
285	  disabled; if unsure, say Y here.
286
287if MISC_FILESYSTEMS
288
289source "fs/orangefs/Kconfig"
290source "fs/adfs/Kconfig"
291source "fs/affs/Kconfig"
292source "fs/ecryptfs/Kconfig"
293source "fs/hfs/Kconfig"
294source "fs/hfsplus/Kconfig"
295source "fs/befs/Kconfig"
296source "fs/bfs/Kconfig"
297source "fs/efs/Kconfig"
298source "fs/jffs2/Kconfig"
299# UBIFS File system configuration
300source "fs/ubifs/Kconfig"
301source "fs/cramfs/Kconfig"
302source "fs/squashfs/Kconfig"
303source "fs/freevxfs/Kconfig"
304source "fs/minix/Kconfig"
305source "fs/omfs/Kconfig"
306source "fs/hpfs/Kconfig"
307source "fs/qnx4/Kconfig"
308source "fs/qnx6/Kconfig"
309source "fs/romfs/Kconfig"
310source "fs/pstore/Kconfig"
311source "fs/sysv/Kconfig"
312source "fs/ufs/Kconfig"
313source "fs/erofs/Kconfig"
314source "fs/vboxsf/Kconfig"
315
316endif # MISC_FILESYSTEMS
317
318menuconfig NETWORK_FILESYSTEMS
319	bool "Network File Systems"
320	default y
321	depends on NET
322	help
323	  Say Y here to get to see options for network filesystems and
324	  filesystem-related networking code, such as NFS daemon and
325	  RPCSEC security modules.
326
327	  This option alone does not add any kernel code.
328
329	  If you say N, all options in this submenu will be skipped and
330	  disabled; if unsure, say Y here.
331
332if NETWORK_FILESYSTEMS
333
334source "fs/nfs/Kconfig"
335source "fs/nfsd/Kconfig"
336
337config GRACE_PERIOD
338	tristate
339
340config LOCKD
341	tristate
342	depends on FILE_LOCKING
343	select GRACE_PERIOD
344
345config LOCKD_V4
346	bool
347	depends on NFSD_V3 || NFS_V3
348	depends on FILE_LOCKING
349	default y
350
351config NFS_ACL_SUPPORT
352	tristate
353	select FS_POSIX_ACL
354
355config NFS_COMMON
356	bool
357	depends on NFSD || NFS_FS || LOCKD
358	default y
359
360config NFS_V4_2_SSC_HELPER
361	bool
362	default y if NFS_V4_2
363
364source "net/sunrpc/Kconfig"
365source "fs/ceph/Kconfig"
366
367source "fs/cifs/Kconfig"
368source "fs/ksmbd/Kconfig"
369
370config SMBFS_COMMON
371	tristate
372	default y if CIFS=y
373	default m if CIFS=m
374
375source "fs/coda/Kconfig"
376source "fs/afs/Kconfig"
377source "fs/9p/Kconfig"
378
379endif # NETWORK_FILESYSTEMS
380
381source "fs/nls/Kconfig"
382source "fs/dlm/Kconfig"
383source "fs/unicode/Kconfig"
384
385config IO_WQ
386	bool
387
388endmenu
389